Atomic-scale investigation of interface structures in polysynthetically twinned TiAl single crystals

doi:10.1016/j.intermet.2023.108090

IMR OpenIR

	Atomic-scale investigation of interface structures in polysynthetically twinned TiAl single crystals
	He, Neng 1; Cheng, Yongxin 2; Yuan, Tian 1; He, Lianlong 1; Chen, Chunlin 1,3; Qi, Zhixiang 4; Chen, Yang 4; Chen, Guang 4; Ye, Hengqiang 3
通讯作者	He, Lianlong(llhe@imr.ac.cn) ; Chen, Chunlin(clchen@imr.ac.cn) ; Qi, Zhixiang(zxqi@njust.edu.cn)
	2024
发表期刊	INTERMETALLICS
ISSN	0966-9795
卷号	164 页码:8
摘要	Interface structures of gamma-TiAl/alpha(2)-Ti3Al and differently oriented gamma/gamma lamellae in PST-TiAl crystals with 0 degrees lamellar orientation have been systematically investigated on an atomistic scale using high-resolution scanning trans-mission electron microscopy. The gamma/alpha(2) lamellar interfaces are atomically abrupt and coherent except for steps with a height of even number (mainly two) of (111)gamma planes. These steps are associated with Shockley partial dislocations that slip on alternate (111)gamma or (0002)alpha(2) planes to accomplish the gamma (sic) alpha(2) transformation. Three kinds of gamma/gamma interface structures are all atomically flat and coherent. The gamma/gamma twin boundaries contain steps associated with Shockley and Frank partial dislocations, while there are usually no steps and mismatch dislocations on the gamma/gamma ordered boundaries and pseudo-twin boundaries. But there is a thin alpha 2 lamella with a thickness of two or three lattice cells sandwiched between some gamma/gamma ordered boundaries. More intriguingly, the gamma lamella terminated in the alpha 2 lamella, or vice versa, forms the flat and coherent (1 (1) over bar 00)alpha(2)/(1 (2) over bar1)gamma end interfaces with the existence of steps associated with dislocations.
关键词	Polysynthetically twinned TiAl crystals Interface structures Steps Transformation High-resolution scanning transmission electron microscopy
资助者	National Natural Science Foundation of China ; Basic and Applied Basic Research Major Programme of Guangdong Province, China ; Key Research Program of Frontier Sciences, CAS
DOI	10.1016/j.intermet.2023.108090
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52201031] ; National Natural Science Foundation of China[52125101] ; National Natural Science Foundation of China[92163215] ; National Natural Science Foundation of China[52174364] ; National Natural Science Foundation of China[X210141TL210] ; Basic and Applied Basic Research Major Programme of Guangdong Province, China[2021B0301030003] ; Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-JSC027]
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:001102315100001
出版者	ELSEVIER SCI LTD
引用统计	被引频次：7[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/321006/177389
专题	中国科学院金属研究所
通讯作者	He, Lianlong; Chen, Chunlin; Qi, Zhixiang
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 3.Ji Hua Lab, Foshan 528200, Peoples R China 4.Nanjing Univ Sci & Technol, Engn Res Ctr Mat Behav & Design, Natl Key Lab Adv Casting Technol, MIIT Key Lab Adv Met & Intermet Mat Technol,Minist, Nanjing 210094, Peoples R China
推荐引用方式 GB/T 7714	He, Neng,Cheng, Yongxin,Yuan, Tian,et al. Atomic-scale investigation of interface structures in polysynthetically twinned TiAl single crystals[J]. INTERMETALLICS,2024,164:8.
APA	He, Neng.,Cheng, Yongxin.,Yuan, Tian.,He, Lianlong.,Chen, Chunlin.,...&Ye, Hengqiang.(2024).Atomic-scale investigation of interface structures in polysynthetically twinned TiAl single crystals.INTERMETALLICS,164,8.
MLA	He, Neng,et al."Atomic-scale investigation of interface structures in polysynthetically twinned TiAl single crystals".INTERMETALLICS 164(2024):8.