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Physical and Mechanical Behavior of NiTi Composite Fabricated by Newly Developed Uni-Axial Compaction Die
- Source :
- Materials Research v.24 n.3 2021, Materials research (São Carlos. Online), Universidade Federal de São Carlos (UFSCAR), instacron:ABM ABC ABPOL, Materials Research, Vol 24, Iss 3 (2021), Materials Research, Volume: 24, Issue: 3, Article number: e20200549, Published: 07 MAY 2021
- Publication Year :
- 2021
- Publisher :
- ABM, ABC, ABPol, 2021.
-
Abstract
- Owing to better mechanical properties and shape memory effect, the NiTi composites fabricated by powder metallurgy are suitable for biomedical implants. However, the excessive porosity and formation of micro-cracks are the major issues related to the NiTi composite. This work focused on developing crack-free dense NiTi composites by newly developed uni-axial compaction die. The work includes the design and manufacturing of uni-axial compaction die. The die was tested by SOLIDWORKS software in a simulated environment. Further, composite samples were successfully fabricated without circumferential micro-cracks at 1910.82 MPa compaction pressure. The effects of compaction pressure on microstructural, densification, and mechanical behavior of NiTi composites were also analyzed. Microstructural characterization shows that the Ni-rich phase increased and the Ti-rich phase decreased with the increase of compaction pressure. The porosity reduces from 17.04 to 8.75% by increasing the compaction pressure from 1273.88 to 1910.82 MPa, and a maximum density of 5.50 g.cm–3 was obtained. The NiTi150 composite has similar Young’s modulus, and compressive strength (6.93 GPa and 94.36 MPa) compared to cortical and cancellous bone. The high compaction pressure also increases the micro-hardness of NiTi composite up to 453.8 HV0.5.
- Subjects :
- density
Materials science
business.product_category
Mechanical Engineering
Composite number
Compaction
Modulus
Composite
Condensed Matter Physics
hardness
Compressive strength
Mechanics of Materials
Nickel titanium
Powder metallurgy
TA401-492
Die (manufacturing)
General Materials Science
compaction
Composite material
Porosity
business
strength
hardnes
Materials of engineering and construction. Mechanics of materials
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Materials Research v.24 n.3 2021, Materials research (São Carlos. Online), Universidade Federal de São Carlos (UFSCAR), instacron:ABM ABC ABPOL, Materials Research, Vol 24, Iss 3 (2021), Materials Research, Volume: 24, Issue: 3, Article number: e20200549, Published: 07 MAY 2021
- Accession number :
- edsair.doi.dedup.....f5dcceac879e063bb758a580b91182a3