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Materials (Basel). 2019 Apr 8;12(7). pii: E1136. doi: 10.3390/ma12071136.

Novel Ultralight-Weight Complex Concentrated Alloys with High Strength.

Author information

1
Laboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai 200444, China. JiaYF710@163.com.
2
Laboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai 200444, China. yandongjia@shu.edu.cn.
3
Laboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai 200444, China. wushiwei@shu.edu.cn.
4
Laboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai 200444, China. melodyxd@126.com.
5
Laboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai 200444, China. g.wang@shu.edu.cn.

Abstract

To explore a novel high strength and low modulus ultralight-weight complex concentrated alloys (ULW-CCAs), a series of light alloys are designed and explored based on some low-density and low modulus elements, such as Al, Li, Mg, Ca, Si, and Y. An Al19.9Li30Mg35Si10Ca₅Y0.1 (at %) CCA with a high specific strength of 327 KPa·m-3 is successfully developed. After adjusting the composition, the Al15Li35Mg48Ca₁Si₁ CCA with the good compressive plasticity is successfully developed. The Al15Li38Mg45Ca0.5Si1.5 and Al15Li39Mg45Ca0.5Si0.5 CCAs exhibit good plasticity of >45%, and >60%, respectively. These ULW-CCAs show the high specific strength, good ductility, and low Young's modulus, as compared with the previously reported CCAs.

KEYWORDS:

high specific strength; low Young’s modulus; ultralight-weight complex concentrated alloys

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