材料科学
极限抗拉强度
合金
延伸率
降水
沉淀硬化
产量(工程)
冶金
变形(气象学)
位错
纳米尺度
复合材料
纳米技术
物理
气象学
作者
Zhen Wei,Hao Dong,Jinghuai Zhang,Ruizhi Wu,Yuying He,Rirong Bao,Xiaobo Zhang,Jiahao Wang
标识
DOI:10.1016/j.msea.2023.145842
摘要
For ultralight Mg–Li alloys, the improvement of strength is the most concerned issue. In this work, we successfully realize the incredible enhancement of strength in the Mg-8.5Li-7.5Zn-1.5Y alloy via a series of preparation processes, and the excellent tensile properties containing high yield strength of 312.4 MPa and good elongation of 14.2 % are obtained. Yield strength increment is as high as 213 MPa through deformation processing, which is rarely reported in Mg–Li alloys. Qualitative and quantitative studies reveal that the dislocation cutting of semi-coherent MgLi2Zn nano-precipitates is mainly responsible for such a high yield strength. The new finding for strengthening way is expected to contribute to the design of high-performance Mg–Li alloys.
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