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Development of high-performance quaternary LPSO Mg–Y–Zn–Al alloys by Disintegrated Melt Deposition technique
- Source :
- Materials & Design, Vol 83, Iss, Pp 443-450 (2015)
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- In the present study, new quaternary MgY1.65Zn0.74Al0.53 and MgY3.72Zn1.96Al0.45 alloys (wt.%) were synthesized employing the Disintegrated Melt Deposition (DMD) casting technique followed by hot extrusion. Microstructural characterization revealed the presence of 14H long-period stacking ordered structure (LPSO) and Mg4Y2ZnAl3 phases aligned along the direction of extrusion in both alloys. Refined grains (⩽5 μm) due to the effect of dynamic recrystallization (DRX) were also observed to co-exist with larger worked grains (⩾20 μm) in the extruded microstructures. Compared to monolithic Mg, significant increase in the microhardness (∼67–88%), tensile yield strength (∼245–290%) and ultimate tensile strength (∼113–144%) were observed in the Mg–Y–Zn–Al alloys. Despite the significant increase in strength of materials, failure strains of both Mg–Y–Zn–Al alloys were comparable to monolithic Mg. Ignition temperatures of both Mg–Y–Zn–Al alloys were found to outperform commercially available AZ31, AZ80 and WE43 (high-temperature) Mg alloys, and the highest ignition temperature of 770 °C was achieved in the MgY3.72Zn1.96Al0.45 alloy. Keywords: Mg–Y–Zn, LPSO, DMD, Mechanical properties, Magnesium alloys
- Subjects :
- Materials science
Mechanical Engineering
Alloy
Metallurgy
engineering.material
Microstructure
Indentation hardness
Casting
Mechanics of Materials
Ultimate tensile strength
lcsh:TA401-492
engineering
Dynamic recrystallization
lcsh:Materials of engineering and construction. Mechanics of materials
General Materials Science
Extrusion
Deposition (law)
Subjects
Details
- ISSN :
- 02641275
- Volume :
- 83
- Database :
- OpenAIRE
- Journal :
- Materials & Design
- Accession number :
- edsair.doi.dedup.....2f76b97f802a5d1166ab35c2b1a0dedb