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

doi:10.1016/j.intermet.2020.106995

IMR OpenIR

	Atomic-scale investigation on the interface structure of {2(2)over-bar01} alpha(2)-Ti3Al deformation twins in polysynthetically twinned TiAl single crystals
	He, Neng 1,2; Qi, Zhixiang 3; Cheng, Yongxin 1,2; Zhang, Jinpeng 3; He, Lianlong 1,2; Chen, Guang 3
通讯作者	He, Lianlong(llhe@imr.ac.cn) ; Chen, Guang(gchen@njust.edu.cn)
	2021
发表期刊	INTERMETALLICS
ISSN	0966-9795
卷号	128 页码:6
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.
关键词	Polysynthetically twinned TiAl single crystals alpha 2-Ti3Al twins Transmission electron microscope Superlattice intrinsic stacking fault Antiphase boundary Lattice correspondence
资助者	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
DOI	10.1016/j.intermet.2020.106995
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000596368300002
出版者	ELSEVIER SCI LTD
引用统计	被引频次：14[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/321006/158707
专题	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.