Deformation twinning in fatigue crack tip plastic zone of Ti-6Al-4V alloy with Widmanstatten microstructure

IMR OpenIR

	Deformation twinning in fatigue crack tip plastic zone of Ti-6Al-4V alloy with Widmanstatten microstructure
	Ma, Yingjie; Xue, Qi; Wang, Hao; Huang, Sensen; Qiu, Jianke; Feng, Xin; Lei, Jiafeng; Yang, Rui; Lei, JF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
	2017-10-01
发表期刊	ELSEVIER SCIENCE INC
ISSN	1044-5803
卷号	132 页码:338-347
摘要	Titanium alloys with the Widmanstatten microstructure usually exhibit high resistance to crack propagation and high fracture toughness. However, this has rarely been connected to mechanical twins. In this study, deformation twinning, which is popular in the fatigue crack tip plastic zone of alpha/beta titanium alloys with the Widmanstatten microstructure, was systematically investigated with the electron backscatter diffraction technique. With the propagation of the fatigue crack, large-scale twins were generated due to the periodic loading and the crystallographic feature of the Widmanstatten microstructure, and they ultimately consumed the major volume of the parent alpha colony. Twin development with various ranks of Schmid factors (SF) was characterized, while ordinary deformation twins with relatively high rank SF grew most, extraordinary twins with very low rank SF were also activated, although restricted by the ordinary twins. The occurrence of extraordinary twins (including primary and secondary twins) was mainly attributed to the non-uniform local stress distribution induced by the plastic deformation compatibility between the neighboring units. Lastly, the influence of deformation twinning on the mechanical properties concerning crack propagation in hexagonal alpha-Ti alloys was discussed.; Titanium alloys with the Widmanstatten microstructure usually exhibit high resistance to crack propagation and high fracture toughness. However, this has rarely been connected to mechanical twins. In this study, deformation twinning, which is popular in the fatigue crack tip plastic zone of alpha/beta titanium alloys with the Widmanstatten microstructure, was systematically investigated with the electron backscatter diffraction technique. With the propagation of the fatigue crack, large-scale twins were generated due to the periodic loading and the crystallographic feature of the Widmanstatten microstructure, and they ultimately consumed the major volume of the parent alpha colony. Twin development with various ranks of Schmid factors (SF) was characterized, while ordinary deformation twins with relatively high rank SF grew most, extraordinary twins with very low rank SF were also activated, although restricted by the ordinary twins. The occurrence of extraordinary twins (including primary and secondary twins) was mainly attributed to the non-uniform local stress distribution induced by the plastic deformation compatibility between the neighboring units. Lastly, the influence of deformation twinning on the mechanical properties concerning crack propagation in hexagonal alpha-Ti alloys was discussed.
部门归属	[ma, yingjie ; xue, qi ; wang, hao ; huang, sensen ; qiu, jianke ; lei, jiafeng ; yang, rui] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china ; [xue, qi ; huang, sensen] northeastern univ, shenyang 110089, liaoning, peoples r china ; [feng, xin] aecc beijing inst aeronaut mat, beijing 100095, peoples r china
关键词	Titanium Alloy Widmanstatten Microstructure Twinning Ctpz
学科领域	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
资助者	Natural Science Foundation of China [51401221, 51671195]
收录类别	SCI
语种	英语
WOS记录号	WOS:000413878800039
引用统计	被引频次：46[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79071
专题	中国科学院金属研究所
通讯作者	Lei, JF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Ma, Yingjie,Xue, Qi,Wang, Hao,et al. Deformation twinning in fatigue crack tip plastic zone of Ti-6Al-4V alloy with Widmanstatten microstructure[J]. ELSEVIER SCIENCE INC,2017,132:338-347.
APA	Ma, Yingjie.,Xue, Qi.,Wang, Hao.,Huang, Sensen.,Qiu, Jianke.,...&Lei, JF .(2017).Deformation twinning in fatigue crack tip plastic zone of Ti-6Al-4V alloy with Widmanstatten microstructure.ELSEVIER SCIENCE INC,132,338-347.
MLA	Ma, Yingjie,et al."Deformation twinning in fatigue crack tip plastic zone of Ti-6Al-4V alloy with Widmanstatten microstructure".ELSEVIER SCIENCE INC 132(2017):338-347.