14 results on '"Gokuldoss, Prashanth Konda"'
Search Results
2. Metallic Coatings through Additive Manufacturing: A Review
- Author
-
Mohanty, Shalini, primary and Gokuldoss Prashanth, Konda, additional
- Published
- 2023
- Full Text
- View/download PDF
3. Characterization of Al/crystallized Al-based metallic glass composites produced by repeated roll bonding process
- Author
-
Alizadeh, Morteza, Khoramkhorshid, Saba, Taghvaei, Amir Hossein, and Gokuldoss, Prashanth Konda
- Published
- 2017
- Full Text
- View/download PDF
4. Effect of boron addition on thermal and mechanical properties of Co-Cr-Mo-C-(B) glass-forming alloys
- Author
-
Kim, Jeong Tae, primary, Hong, Sung Hwan, additional, Bian, Xilei, additional, Gokuldoss, Prashanth Konda, additional, Song, Kaikai, additional, Eckert, Jürgen, additional, Park, Jin Man, additional, and Kim, Ki Buem, additional
- Published
- 2018
- Full Text
- View/download PDF
5. Additive Manufacturing Processes: Selective Laser Melting, Electron Beam Melting and Binder Jetting—Selection Guidelines
- Author
-
Gokuldoss, Prashanth Konda, primary, Kolla, Sri, additional, and Eckert, Jürgen, additional
- Published
- 2017
- Full Text
- View/download PDF
6. Tensile Properties of Al-12Si Fabricated via Selective Laser Melting (SLM) at Different Temperatures
- Author
-
Gokuldoss Prashanth, Konda, primary, Scudino, Sergio, additional, and Eckert, Jürgen, additional
- Published
- 2016
- Full Text
- View/download PDF
7. Effect of Al2O3 Nanoparticles as Reinforcement on the Tensile Behavior of Al-12Si Composites.
- Author
-
Pan Ma, Yandong Jia, Gokuldoss, Prashanth Konda, Zhishui Yu, Shanglei Yang, Jian Zhao, and Chonggui Li
- Subjects
ALUMINUM oxide ,NANOPARTICLES ,TENSILE strength ,METALLIC composites ,METAL extrusion - Abstract
Al
2 O3 nanoparticle-reinforced Al-12Si matrix composites were successfully fabricated by hot pressing and subsequent hot extrusion. The influence of weight fraction of Al2 O3 particles on the microstructure, mechanical properties, and the corresponding strengthening mechanisms were investigated in detail. The Al2 O3 particles are uniformly distributed in the matrix, when 2 and 5 wt. %of Al2 O3 particles were added to the Al-12Si matrix. Significant agglomeration can be found in composites with 10 wt. %addition of Al2 O3 nanoparticles. The maximum hardness, the yield strength, and tensile strength were obtained for the composite with 5 wt. % Al2 O3 addition, which showed an increase of about ~11%, 23%, and 26%, respectively, compared with the Al-12Si matrix. Meanwhile, the elongation increased to about ~30%. The contribution of different mechanisms including Orowan strengthening, thermal mismatch strengthening, and load transfer strengthening were analyzed. It was shown that the thermal mismatch strengthening has a more significant contribution to strengthening these composites than the Orowan and load transfer strengthening mechanisms. [ABSTRACT FROM AUTHOR]- Published
- 2017
- Full Text
- View/download PDF
8. Selective Laser Melting of Ti-45Nb Alloy.
- Author
-
Schwab, Holger, Gokuldoss Prashanth, Konda, Löber, Lukas, Kühn, Uta, and Eckert, Jürgen
- Subjects
MELTING ,SELECTIVE laser sintering ,TITANIUM alloys ,X-ray diffraction ,YOUNG'S modulus - Abstract
Ti-45Nb is one of the potential alloys that can be applied for biomedical applications as implants due to its low Young's modulus. Ti-45Nb (wt.%) gas atomized powders were used to produce bulk samples by selective laser melting with three different parameter sets (energy inputs). A β-phase microstructure consisting of elliptical grains with an enriched edge of titanium was observed by scanning electron microscopy and X-ray diffraction studies. The mechanical properties of these samples were evaluated using hardness and compression tests, which suggested that the strength of the samples increases with increasing energy input within the range considered. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
9. Effect of Milling Time and the Consolidation Process on the Properties of Al Matrix Composites Reinforced with Fe-Based Glassy Particles.
- Author
-
Balcı, Özge, Gokuldoss Prashanth, Konda, Scudino, Sergio, Ağaoğulları, Duygu, Duman, İsmail, Öveçoğlu, M. Lütfi, Uhlenwinkel, Volker, and Eckert, Jürgen
- Subjects
MILLING (Metalwork) ,FIBROUS composites ,IRON compounds ,MAGNETIC materials ,POWDER metallurgy - Abstract
Al matrix composites reinforced with 40 vol% Fe50.1Co35.1Nb7.7B4.3Si2.8 glassy particles have been produced by powder metallurgy, and their microstructure and mechanical properties have been investigated in detail. Different processing routes (hot pressing and hot extrusion) are used in order to consolidate the composite powders. The homogeneous distribution of the glassy reinforcement in the Al matrix and the decrease of the particle size are obtained through ball milling. This has a positive effect on the hardness and strength of the composites. Mechanical tests show that the hardness of the hot pressed samples increases from 51-155 HV, and the strength rises from 220-630 MPa by extending the milling time from 1-50 h. The use of hot extrusion after hot pressing reduces both the strength and hardness of the composites: however, it enhances the plastic deformation significantly. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
10. Solving the Issue of Discriminant Roughness of Heterogeneous Surfaces Using Elements of Artificial Intelligence.
- Author
-
Kubišová, Milena, Pata, Vladimír, Měřínská, Dagmar, Škrobák, Adam, Marcaník, Miroslav, and Gokuldoss, Prashanth Konda
- Subjects
ARTIFICIAL intelligence ,SURFACE roughness ,PROBLEM solving ,FIBER lasers ,MACHINING ,LASER beam cutting - Abstract
This work deals with investigative methods used for evaluation of the surface quality of selected metallic materials' cutting plane that was created by CO
2 and fiber laser machining. The surface quality expressed by Rz and Ra roughness parameters is examined depending on the sample material and the machining technology. The next part deals with the use of neural networks in the evaluation of measured data. In the last part, the measured data were statistically evaluated. Based on the conclusions of this analysis, the possibilities of using neural networks to determine the material of a given sample while knowing the roughness parameters were evaluated. The main goal of the presented paper is to demonstrate a solution capable of finding characteristic roughness values for heterogeneous surfaces. These surfaces are common in scientific as well as technical practice, and measuring their quality is challenging. This difficulty lies mainly in the fact that it is not possible to express their quality by a single statistical parameter. Thus, this paper's main aim is to demonstrate solutions using the cluster analysis methods and the hidden layer, solving the problem of discriminant and dividing the heterogeneous surface into individual zones that have characteristic parameters. [ABSTRACT FROM AUTHOR]- Published
- 2021
- Full Text
- View/download PDF
11. Regional Control and Optimization of Heat Input during CMT by Wire Arc Additive Manufacturing: Modeling and Microstructure Effects.
- Author
-
Chen, Furong, Yang, Yihang, Feng, Hualong, Gokuldoss, Prashanth Konda, and Wang, Zhi
- Subjects
HEATING control ,SPECIFIC heat capacity ,THERMAL diffusivity ,MICROSTRUCTURE ,MANUFACTURING processes ,THERMOPHYSICAL properties ,ATMOSPHERIC nitrogen - Abstract
Wire arc additive manufacturing (WAAM) of aluminum-magnesium (Al–Mg) ER5356 alloy deposits is accomplished by cold metal transfer (CMT). During the process, the temperature change of the alloy deposits has a great influence on molding quality, and the microstructure and properties of alloy deposits are also affected by the complex thermal history of the additive manufacturing process. Here, we used an inter-layer cooling process and controlled the heat input process to attempt to reduce the influence of thermal history on alloy deposits during the additive process. The results showed that inter-layer cooling can optimize the molding quality of alloy deposits, but with the disadvantages of a long test time and slow deposition rate. A simple and uniform reduction of heat input makes the molding quality worse, but controlling the heat input by regions can optimize the molding quality of the alloy deposits. The thermophysical properties of Al-Mg alloy deposits were measured, and we found that the specific heat capacity and thermal diffusivity of alloy deposits were not obviously affected by the temperature. The microstructure and morphology of the deposited specimens were observed and analyzed by microscope and electron back-scatter diffraction (EBSD). The process of controlled heat input results in a higher deposition rate, less side-wall roughness, minimum average grain size, and less coarse recrystallization. In addition, different thermal histories lead to different texture types in the inter-layer cooling process. Finally, a controlled heat input process yields the highest average microhardness of the deposited specimen, and the fluctuation range is small. We expect that the process of controlling heat input by model height region will be widely used in the WAAM field. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
12. Performance of Sn-3.0Ag-0.5Cu Composite Solder with Kaolin Geopolymer Ceramic Reinforcement on Microstructure and Mechanical Properties under Isothermal Ageing.
- Author
-
Zaimi, Nur Syahirah Mohamad, Salleh, Mohd Arif Anuar Mohd, Sandu, Andrei Victor, Abdullah, Mohd Mustafa Al Bakri, Saud, Norainiza, Rahim, Shayfull Zamree Abd, Vizureanu, Petrica, Said, Rita Mohd, Ramli, Mohd Izrul Izwan, and Gokuldoss, Prashanth Konda
- Subjects
SOLDER & soldering ,LEAD-free solder ,SOLDER joints ,KAOLIN ,KIRKENDALL effect ,COPPER-tin alloys ,FLIP chip technology - Abstract
This paper elucidates the effect of isothermal ageing at temperature of 85 °C, 125 °C and 150 °C for 100, 500 and 1000 h on Sn-3.0Ag-0.5Cu (SAC305) lead-free solder with the addition of 1 wt% kaolin geopolymer ceramic (KGC) reinforcement particles. SAC305-KGC composite solders were fabricated through powder metallurgy using a hybrid microwave sintering method and reflowed on copper substrate printed circuit board with an organic solderability preservative surface finish. The results revealed that, the addition of KGC was beneficial in improving the total thickness of interfacial intermetallic compound (IMC) layer. At higher isothermal ageing of 150 °C and 1000 h, the IMC layer in SAC305-KGC composite solder was towards a planar-type morphology. Moreover, the growth of total interfacial IMC layer and Cu
3 Sn layer during isothermal ageing was found to be controlled by bulk diffusion and grain-boundary process, respectively. The activation energy possessed by SAC305-KGC composite solder for total interfacial IMC layer and Cu3 Sn IMC was 74 kJ/mol and 104 kJ/mol, respectively. Based on a lap shear test, the shear strength of SAC305-KGC composite solder exhibited higher shear strength than non-reinforced SAC305 solder. Meanwhile, the solder joints failure mode after shear testing was a combination of brittle and ductile modes at higher ageing temperature and time for SAC305-KGC composite solder. [ABSTRACT FROM AUTHOR]- Published
- 2021
- Full Text
- View/download PDF
13. 3D Phase Field Modeling of Multi-Dendrites Evolution in Solidification and Validation by Synchrotron X-ray Tomography.
- Author
-
Wang, Shuo, Guo, Zhipeng, Kang, Jinwu, Zou, Meishuai, Li, Xiaodong, Zhang, Ang, Du, Wenjia, Zhang, Wei, Lee, Tung Lik, Xiong, Shoumei, Mi, Jiawei, and Gokuldoss, Prashanth Konda
- Subjects
TOMOGRAPHY ,X-ray computed microtomography ,X-rays ,SOLIDIFICATION ,FIREARMS ,SYNCHROTRONS - Abstract
In this paper, the dynamics of multi-dendrite concurrent growth and coarsening of an Al-15 wt.% Cu alloy was studied using a highly computationally efficient 3D phase field model and real-time synchrotron X-ray micro-tomography. High fidelity multi-dendrite simulations were achieved and the results were compared directly with the time-evolved tomography datasets to quantify the relative importance of multi-dendritic growth and coarsening. Coarsening mechanisms under different solidification conditions were further elucidated. The dominant coarsening mechanisms change from small arm melting and interdendritic groove advancement to coalescence when the solid volume fraction approaches ~0.70. Both tomography experiments and phase field simulations indicated that multi-dendrite coarsening obeys the classical Lifshitz–Slyozov–Wagner theory R n − R 0 n = k c ( t − t 0) , but with a higher constant of n = 4.3. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
14. Strengthening of Al-based composites by microstructural modifications
- Author
-
Shahid, Hafiz Rub Nawaz, Eckert, Jürgen, Gokuldoss, Prashanth Konda, Technische Universität Dresden, and IFW-Dresden
- Subjects
ddc:621.3 ,Aluminiumbasierte Verbundwerkstoffe, harmonische Strukturen, Phasentransformation, Pulvermetallurgie, Intermetallics, Kugelmahlen, mechanische Eigenschaften ,Aluminum based composites, Harmonic structures, Phase transformation, Powder metallurgy, Intermetallics, Ball milling, Mechanical properties ,ddc:620 - Abstract
Die Verstärkung von Aluminium-Matrix-Verbundwerkstoffen kann durch die Integration von Hartphasenpartikeln in die Matrix erreicht werden. Die Festigkeitssteigerung der Komposite ist abhängig davon, wie die Verstärkungsphase die einwirkenden Kräfte aufnehmen kann und zudem von den Auswirkungen der Verstärkungsphase auf das Werkstoffgefüge. Die Verfestigung wird zurückgeführt auf Versetzungsmultiplikation, Matrixpartitionierung und Orowan-Verstärkungseffekte. Die Festigkeit steigt durch Erhöhung des Volumenanteils der Verstärkungsphase sowie durch die Reduktion der Größe der Verstärkungsphase. Darüber hinaus kann die Festigkeitssteigerung von Verbundwerkstoffen durch eine Gefügemodifikation verbunden mit einer Reaktion zwischen Matrix und Verstärkungsphase erreicht werden. Die Festigkeitssteigerung kann auch durch die Schaffung harmonischer Strukturen, d.h. durch ein bimodales Gefüge, erfolgen. Dieses wird erzeugt durch kontrolliertes Mahlen der partikelförmigen Precursor-Phase, die dann aus grobkörnigen Kerngebieten bestehen, eingebettet in eine kontinuierliche feinkörnige Matrix. In dieser Arbeit werden Verbundwerkstoffe auf Aluminiumbasis durch Hochenergiemahlen und anschließender Konsolidierung durch Heißpressen hergestellt. Ausgehend von der in-situ Herstellung intermetallischer Verstärkungsphasen in Al-Mg-Verbundwerkstoffen werden außerdem in-situ Gefügemodifikationen in Al-Fe3Al-Verbundwerkstoffen betrachtet. Al-Fe3Al-Verbundwerkstoffe mit harmonischer Struktur konnten dabei erfolgreich hergestellt werden. Anschließend wurde der Einfluss der mikrostrukturellen Veränderungen auf die mechanischen Eigenschaften analysiert. Al-Mg-Metallmatrix-Verbundwerkstoffe werden aus den Pulvergemischen von elementarem Aluminium und Magnesium durch druckunterstütztes reaktives Sintern hergestellt. Das Ziel ist es, den Einfluss des anfänglichen Volumenanteils von Magnesium auf die mikrostrukturellen Veränderungen und die Entstehung der in-situ intermetallischen Verstärkungsphase zu analysieren. Zudem wird der Einfluss der Reaktion zwischen Aluminium und Magnesium und die damit verbundene Bildung der intermetallischen Phasen β-Al3Mg2 und γ-Al12Mg17 auf die mechanischen Eigenschaften der Verbundwerkstoffe untersucht. Die Bildung der intermetallischen Phasen verbraucht zunehmend Aluminium und Magnesium und bewirkt eine Verfestigung der Verbundwerkstoffe: Die Streckgrenze und die Druckfestigkeit steigen mit zunehmendem Gehalt an intermetallischer Verstärkungsphase auf Kosten der plastischen Verformung. In der nächsten Phase wird im Al-Fe3Al-System die Wirksamkeit der Reaktion zwischen Matrix und Verstärkungsphase als festigkeitssteigernde Maßnahme zur weiteren Verbesserung der mechanischen Eigenschaften untersucht. Dafür werden transformierte und nicht-transformierte Verbundwerkstoffe durch Heißpressen bei unterschiedlichen Temperaturen hergestellt. Phasenanalyse und mikrostrukturelle Charakterisierung der transformierten Verbundwerkstoffe zeigten die Bildung der intermetallischen Phasen Al5Fe2 und Al13Fe4, die als Verstärkungsphase mantelförmig um die die Fe3Al-Phase angeordnet sind. Die Al-Matrix wird dabei mit steigendem Anteil an Verstärkungsphase zunehmend verbraucht. Um die durch die Al-Fe3Al-Reaktion induzierte Phasenfolge zu analysieren, wurden Verbundwerkstoffe, bestehend aus Al-Matrix und einem einzigen mm-großen Fe3Al-Partikel durch Heißpressen bei 823, 873 und 903 K synthetisiert. Die Gefüge- und Phasenanalyse deuten darauf hin, dass die In-situ-Phasenumwandlung durch atomare Diffusion von Aluminium in Fe3Al erfolgt und die Bildung von in-situ intermetallischen Phasen (Al5Fe2 und Al13Fe4) ausschließlich innerhalb der ursprünglichen Fe3Al-Partikel stattfindet. Die Phasenumwandlung beim Heißpressen führt zu einer signifikanten Festigkeitssteigerung: Die Streckgrenze und die Druckfestigkeit erhöhen sich von 70-360 MPa und 200-500 MPa für die nicht umgewandelten Verbundwerkstoffe auf 400-1800 MPa und 550-1800 MPa für die umgewandelten Materialien. Damit verbunden ist jedoch auch eine verringerte plastische Verformbarkeit in den umgewandelten Kompositen. Die Streckgrenze von transformierten und nicht transformierten Verbundwerkstoffen folgt dem Iso-Stress-Modell, wenn die charakteristischen strukturellen Merkmale (d.h. Verstärkungsphasen und Matrix) berücksichtigt werden. Schließlich wird das Konzept der harmonischen Strukturen für Metallmatrix-Verbundwerkstoffe erweitert, indem die Wirksamkeit solcher bimodaler Gefüge als Verstärkungsmethode für Verbundwerkstoffe aus einer reinen Al-Matrix verstärkt mit Fe3Al-Partikeln betrachtet wird. Ziel der Studie ist es, die Gefügeveränderungen zu untersuchen, die durch das Hochenergiemahlen der Al-Fe3Al-Verbundpulvermischungen induziert werden. Weiterhin soll der Einfluss des so veränderten Gefüges auf das mechanische Verhalten der durch Heißpressen synthetisierten Verbundproben charakterisiert werden. Die beabsichtigte Kornfeinung beschränkt sich auf die Oberfläche der Partikel, wo die Fe3Al-Phase während der Kugelmahlung der Al-Fe3Al-Verbundpulvermischungen nach und nach fragmentiert wird. In den bei der anschließenden Pulverkonsolidierung erzeugten harmonisierten Kompositen wird die feinkörnige Oberfläche zur kontinuierlichen feinkörnigen Matrix, die Makroregionen mit grobkörnigen Verstärkungspartikeln umschließt. Die Erzeugung der bimodalen Gefüge hat einen signifikanten Einfluss auf die Festigkeit der harmonischen Verbundwerkstoffe, die die des konventionellen Materials um den Faktor 2 übertrifft, ohne die plastische Verformbarkeit zu beeinträchtigen. Zudem zeigt die Modellierung der mechanischen Eigenschaften, dass die Festigkeit der harmonischen Verbundwerkstoffe genau beschrieben werden kann, indem sowohl der Volumenanteil der Verstärkungsphase als auch die charakteristischen Gefügemerkmale der harmonischen Struktur berücksichtigt werden. Die Ergebnisse der vorliegenden Arbeit zeigen, dass die Pulvermetallurgie (d.h. Hochenergiemahlen mit anschließendem Heißpressen) erfolgreich eingesetzt werden kann, um hochfeste Verbundwerkstoffe auf Aluminiumbasis mit intermetallischer Verstärkungsphase herzustellen. Die Ergebnisse zeigen, dass durch Phasenumwandlung und durch die Anordnung von Verstärkungsphasen hervorgerufene Gefügeveränderungen die Festigkeit der Verbundwerkstoffe signifikant erhöht werden kann. Die Festigkeit und Verformbarkeit der so erzeugten Komposite hängt vom Volumenanteil und der Anordnung der Verstärkungsphase sowie der Grenzflächenreaktion zwischen den Ausgangskomponenten ab. The strengthening of aluminum matrix composites can be achieved by incorporating hard phase particles in the matrix. The strengthening of the composites depends on the ability of the reinforcement to bear the load and on the microstructural changes induced by the reinforcement addition. The microstructural strengthening is mainly associated with dislocation multiplication, matrix partitioning and Orowan strengthening effects. The strength increases by increasing the reinforcement volume fraction as well as by reducing the size of the reinforcing particles. Additionally, strengthening of composites can be achieved by microstructural modifications through the proper reaction between matrix and reinforcement. Strengthening can also be efficiently attained by the creation of harmonic structures: bimodal microstructures generated by controlled milling of the particulate precursors, which consist of coarse-grained cores embedded in a continuous fine-grained matrix. In this thesis, aluminum based composites are synthesized using ball milling followed by consolidation through hot pressing. Starting from the in-situ creation of intermetallic reinforcements in Al-Mg composites, the research proceeds towards the in-situ microstructural modification in Al-Fe3Al composites. Finally, Al-Fe3Al composites with harmonic structure are successfully produced. The consolidated composites are characterized to analyze the effect of the microstructural changes on the mechanical properties. Lightweight Al-Mg metal matrix composites are synthesized from elemental powder mixtures of aluminum and magnesium using pressure-assisted reactive sintering. The aim is to analyze the effect of the initial volume percent of magnesium on the microstructural modifications and development of the in-situ intermetallic reinforcements. The effect of the reaction between aluminum and magnesium on the mechanical properties of the composites due to the formation of β-Al3Mg2 and γ-Al12Mg17 intermetallics is also investigated. The formation of the intermetallic compounds progressively consumes aluminum and magnesium and induces strengthening of the composites: the yield and compressive strengths increase with increasing the content of intermetallic reinforcement at the expense of the plastic deformation. In the next stage, the effectiveness of the reaction between matrix and reinforcement as a strengthening method for further improving the mechanical performance composites is investigated for the Al-Fe3Al system. To achieve this aim, transformed and non-transformed composites are produced by hot pressing at different temperatures. Phase analysis and microstructural characterization of the transformed composites reveal the formation of a double-shell-reinforcement with Al5Fe2 and Al13Fe4 intermetallics surrounding the Fe3Al phase, while the Al matrix is progressively consumed with increasing the reinforcement content. In order to analyze the phase sequence induced by the Al-Fe3Al reaction, composites consisting of Al matrix and a single mm-sized Fe3Al particle were synthesized through hot pressing at 823, 873 and 903 K. The microstructural investigations and phase identifications suggest that in-situ phase transformation occurs through atomic diffusion of aluminum in Fe3Al and the formation of in-situ intermetallics (Al5Fe2 and Al13Fe4) takes place exclusively within the original Fe3Al particles. The phase transformation during hot pressing induces significant strengthening: the ranges of yield and compressive strengths increase from 70-360 MPa and 200-500 MPa for the non-transformed composites to 400-1800 MPa and 550-1800 MPa for the transformed materials. This occurs at the expense of the plastic deformation, which is generally reduced in the transformed composites. The yield strength of both transformed and non-transformed composites follows the iso-stress model when the characteristic structural features (i.e. strengthening phases and matrix) are taken into account. At the end, the concept of harmonic structures is extended to metal matrix composites by analyzing the effectiveness of such bimodal microstructures as a strengthening method for composites consisting of a pure Al matrix reinforced with Fe3Al particles. The purpose of the study is to examine the microstructural variations induced by ball milling of the Al-Fe3Al composite powder mixtures and how such variations influence the resulting microstructure and mechanical response of the bulk composite specimens synthesized by hot-pressing. Preferential microstructural refinement limited to the surface of the particles, where the Fe3Al phase is progressively fragmented, occurs during ball milling of the Al-Fe3Al composite powder mixtures. The refined surface becomes the continuous fine-grained matrix that encloses macro-regions with coarser reinforcing particles in the harmonic composites synthesized during subsequent powder consolidation. The generation of the bimodal microstructure has a significant influence on the strength of the harmonic composites, which exceeds that of the conventional material by a factor of 2 while retaining considerable plastic deformation. Finally, modeling of the mechanical properties indicates that the strength of the harmonic composites can be accurately described by taking into account both the volume fraction of reinforcement and the characteristic microstructural features describing the harmonic structure. The results of the current research work demonstrate that powder metallurgy (i.e. ball milling followed by hot consolidation) can be successfully used to produce high strength aluminum based composites reinforced by intermetallics. The findings indicate that phase transformation and reinforcement arrangement based microstructural modifications can significantly enhance the strength of the composites. The strength and deformability of the composites depends on the volume fraction and arrangement of the reinforcement along with the interfacial reaction between the initial components.
- Published
- 2018
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.