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γ-TiAl中<110>倾斜晶界断裂行为的分子动力学模拟(英文)
赵文娟; 徐东生; 赵敬伟; 王皞
2014-11-15
Source PublicationTransactions of Nonferrous Metals Society of China
Issue11Pages:3645-3651
Abstract采用分子动力学(MD)方法研究γ-Ti Al合金中<110>对称倾斜界面的断裂行为,模拟在不同温度与应变速率下垂直界面方向的拉伸变形。结果表明:晶粒的相对取向及晶界特定的原子结构是影响位错形核临界应力的两个主要因素。取向差角度大于90°的Σ3(111)109.5°、Σ9(221)141.1°和Σ27(552)148.4°界面,位错在晶界处形核和扩展;取向差角度小于90°的Σ27(115)31.6°和Σ11(113)50.5°界面,无位错在晶界处形核,当应力达到峰值后界面直接断裂。γ-Ti Al双晶的断裂机制为微裂纹在界面处的形核及沿界面扩展;不同取向差界面的区别在于裂纹前端有无塑性区增韧。
description.department湘潭大学材料设计及制备技术湖南省重点实验室 ; 湘潭大学机械工程学院 ; 中国科学院金属研究所 ; School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, NSW 2522, Australia
KeywordΓ-tial合金 倾斜晶界 分子动力学 拉伸变形 断裂
Language中文
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73537
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
赵文娟,徐东生,赵敬伟,等. γ-TiAl中<110>倾斜晶界断裂行为的分子动力学模拟(英文)[J]. Transactions of Nonferrous Metals Society of China,2014(11):3645-3651.
APA 赵文娟,徐东生,赵敬伟,&王皞.(2014).γ-TiAl中<110>倾斜晶界断裂行为的分子动力学模拟(英文).Transactions of Nonferrous Metals Society of China(11),3645-3651.
MLA 赵文娟,et al."γ-TiAl中<110>倾斜晶界断裂行为的分子动力学模拟(英文)".Transactions of Nonferrous Metals Society of China .11(2014):3645-3651.
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