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Atomic-scale investigation on the interface structure of {2(2)over-bar01} alpha(2)-Ti3Al deformation twins in polysynthetically twinned TiAl single crystals

文献类型：期刊论文

作者He, Neng1,2; Qi, Zhixiang3; Cheng, Yongxin1,2; Zhang, Jinpeng3; He, Lianlong1,2; Chen, Guang3
刊名INTERMETALLICS
出版日期2021
卷号128页码:6
关键词Polysynthetically twinned TiAl single crystals alpha 2-Ti3Al twins Transmission electron microscope Superlattice intrinsic stacking fault Antiphase boundary Lattice correspondence
ISSN号0966-9795
DOI10.1016/j.intermet.2020.106995
通讯作者He, Lianlong(llhe@imr.ac.cn) ; Chen, Guang(gchen@njust.edu.cn)
英文摘要The interface structure of {2 (2) over bar 01} alpha(2)-Ti3Al deformation twins formed during tensile deformation of poly synthetically twinned (PST) TiAl single crystals at 900 degrees C has been studied systematically by aberration-corrected scanning transmission electron microscopy. Numerous superlattice intrinsic stacking faults (SISFs) are formed on the (0001) basal plane of alpha(2) twins, thereby resulting in the formation of steps on the twin boundaries. The height of steps equals to the spacing of the (2 (2) over bar 01) twinning plane. The basal-plane SISFs formed in alpha(2) twins can't be attributed to the glide of Shockley superpartial dislocations. Lattice correspondence analyses based on classical twinning theory reveal that complex atomic shuffle and interchange shuffling are responsible for the formation of twinning and basal-plane SISFs in alpha(2) twins. In addition, basal-plane antiphase boundaries (APB) are formed at the vicinity of alpha(2) twin tips to relieve the stress concentration imposed by misfit dislocations.
资助项目National Natural Science Foundation of China[51731006] ; National Natural Science Foundation of China[51771093] ; National Natural Science Foundation of China[91860104] ; National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology[6142909190104] ; Fundamental Research Funds for the Central Universities[30919011295]
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:000596368300002
出版者ELSEVIER SCI LTD
资助机构National Natural Science Foundation of China ; National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology ; Fundamental Research Funds for the Central Universities
源URL[http://ir.imr.ac.cn/handle/321006/158706]  
专题金属研究所_中国科学院金属研究所
通讯作者He, Lianlong; Chen, Guang
作者单位1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Nanjing Univ Sci & Technol, MIIT Key Lab Adv Metall & Intermetall Mat Technol, Engn Res Ctr Mat Behav & Design, Minist Educ, Nanjing 210094, Peoples R China
推荐引用方式
GB/T 7714		 He, Neng,Qi, Zhixiang,Cheng, Yongxin,et al. Atomic-scale investigation on the interface structure of {2(2)over-bar01} alpha(2)-Ti3Al deformation twins in polysynthetically twinned TiAl single crystals[J]. INTERMETALLICS,2021,128:6.
APA He, Neng,Qi, Zhixiang,Cheng, Yongxin,Zhang, Jinpeng,He, Lianlong,&Chen, Guang.(2021).Atomic-scale investigation on the interface structure of {2(2)over-bar01} alpha(2)-Ti3Al deformation twins in polysynthetically twinned TiAl single crystals.INTERMETALLICS,128,6.
MLA He, Neng,et al."Atomic-scale investigation on the interface structure of {2(2)over-bar01} alpha(2)-Ti3Al deformation twins in polysynthetically twinned TiAl single crystals".INTERMETALLICS 128(2021):6.

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来源：金属研究所

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