成形性
退火(玻璃)
原子单位
物理
晶体孪晶
合金
凝聚态物理
结晶学
材料科学
化学物理
化学
冶金
微观结构
量子力学
作者
Jian Feng Nie,Yuman Zhu,Jefferson Zhe Liu,Xi‐Ya Fang
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2013-05-24
卷期号:340 (6135): 957-960
被引量:658
标识
DOI:10.1126/science.1229369
摘要
The formability and mechanical properties of many engineering alloys are intimately related to the formation and growth of twins. Understanding the structure and chemistry of twin boundaries at the atomic scale is crucial if we are to properly tailor twins to achieve a new range of desired properties. We report an unusual phenomenon in magnesium alloys that until now was thought unlikely: the equilibrium segregation of solute atoms into patterns within fully coherent terraces of deformation twin boundaries. This ordered segregation provides a pinning effect for twin boundaries, leading to a concomitant but unusual situation in which annealing strengthens rather than weakens these alloys. The findings point to a platform for engineering nano-twinned structures through solute atoms. This may lead to new alloy compositions and thermomechanical processes.
科研通智能强力驱动
Strongly Powered by AbleSci AI