AUTHOR=Tun Khin Sandar , Kumar Amit , Gupta Manoj 

TITLE=Introducing a High Performance Mg-Based Multicomponent Alloy as an Alternative to Al-Alloys

JOURNAL=Frontiers in Materials

VOLUME=6

YEAR=2019

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2019.00215

DOI=10.3389/fmats.2019.00215

ISSN=2296-8016

ABSTRACT=<p>In this study, the design and development of a new Mg-based multicomponent alloy (ρ<sub><italic>th</italic></sub> = 2.33 g/cc; ρ<sub><italic>ex</italic></sub> = 2.15 g/cc) has been presented which exhibits excellent mechanical properties in hot extruded condition. Mg<sub>80</sub>Al<sub>5</sub>Cu<sub>5</sub>Mn<sub>5</sub>Zn<sub>5</sub> alloy was designed and synthesized using disintegrated melt deposition technique followed by hot extrusion. The alloy was designed in such a way that the concentration of each alloying element remained ≥5 at % with Mg (80 at %) as base metal. Significantly high hardness (196 HV) was realized in Mg<sub>80</sub>Al<sub>5</sub>Cu<sub>5</sub>Mn<sub>5</sub>Zn<sub>5</sub> alloy. Compression results showed substantially high ultimate compressive strength (UCS) 616 MPa of this alloy with a reasonably high ductility of 16.9%. This alloy also exhibited superior combination of tensile strengths (TYS- 211 MPa, UTS- 318 MPa) and ductility (8.2%). Overall combination of hardness, tensile and compression properties showed the current new lightweight alloy system as an alternative to most of the commercially used Al-based alloys.</p>