层状结构
材料科学
位错
微观结构
晶体孪晶
纳米晶材料
叠加断层
结晶学
堆积
冶金
复合材料
纳米技术
化学
有机化学
作者
Yue Gao,Tinghong Gao,Lianxin Li,Qian Chen,Zean Tian,Yongchao Liang,Bei Wang
出处
期刊:Vacuum
[Elsevier]
日期:2021-12-01
卷期号:194: 110525-110525
被引量:14
标识
DOI:10.1016/j.vacuum.2021.110525
摘要
Dislocation and twin structures often found in many metal alloys significantly affect their mechanical properties. However, observing the evolution processes of dislocation and twin structures using traditional experimental methods is challenging. In this paper, molecular dynamics was used to study the formation mechanism of dislocation and twin structures in Ti3Al during rapid solidification. Two microstructure types were obtained: nanocrystalline, composed of multiple grains, and lamellar. The lamellar structure is dominated by stacking fault and coherent twin boundary. According to the synthesis and decomposition of different types of dislocations, the formation and evolution of crystal defects under different models are analyzed. This provides a reference for understanding the mechanical properties of Ti3Al alloys with different microstructures.
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