Deformation twinning in fatigue crack tip plastic zone of Ti-6Al-4V alloy with Widmanstatten microstructure
文献类型：期刊论文
| 作者 | 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. |
| 刊名 | ELSEVIER SCIENCE INC
 |
| 出版日期 | 2017-10-01 |
| 卷号 | 132页码:338-347 |
| 关键词 | Titanium Alloy Widmanstatten Microstructure Twinning Ctpz |
| ISSN号 | 1044-5803 |
| 英文摘要 | 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. |
| 学科主题 | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing |
| 语种 | 英语 |
| 资助机构 | Natural Science Foundation of China [51401221, 51671195] |
| 公开日期 | 2018-01-10 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79071]  |
| 专题 | 金属研究所_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. |
入库方式： OAI收割
来源：金属研究所
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