Novel Ultralight-Weight Complex Concentrated Alloys with High Strength

Yuefei Jia; Yandong Jia; Shiwei Wu; Xindi Ma; Gang Wang

doi:10.3390/ma12071136

Novel Ultralight-Weight Complex Concentrated Alloys with High Strength

Materials (Basel). 2019 Apr 8;12(7):1136. doi: 10.3390/ma12071136.

Authors

Yuefei Jia¹, Yandong Jia², Shiwei Wu³, Xindi Ma⁴, Gang Wang⁵

Affiliations

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 Al_19.9Li₃₀Mg₃₅Si₁₀Ca₅Y_0.1 (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 Al₁₅Li₃₈Mg₄₅Ca_0.5Si_1.5 and Al₁₅Li₃₉Mg₄₅Ca_0.5Si_0.5 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.