Deformation twinning in octahedron-based face-centered cubic metallic structures: Localized shear-force dipoles drive atomic displacements

doi:10.1016/j.jmst.2022.02.043

IMR OpenIR

	Deformation twinning in octahedron-based face-centered cubic metallic structures: Localized shear-force dipoles drive atomic displacements
	Gu, Hengfei 1,2; Liu, Chengze 1,3; Yuan, Fusen 1,3; Han, Fuzhou 1,3; Zhang, Yingdong 1,3; Ali, Muhammad 1,3; Guo, Wenbin 1,3; Ren, Jie 1,3; Zhang, Lifeng 4; Wu, Songquan 5; Li, Geping 1,3
通讯作者	Li, Geping(gpli@imr.ac.cn)
	2022-11-01
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	126 页码:116-126
摘要	Twinning is found to impart favorable mechanical, physical and chemical properties to nanostructured materials. Deformation twinning prevails in face-centered cubic (FCC) nanocrystalline materials upon loading. In FCC structures, the <112>{111} deformation twinning is traditionally believed to nucleate and grow through layer by layer emission of 1/6<112> Shockley partial dislocations on consecutive {111} planes. We report that deformation twinning is able to occur in crystalline (Fe, Nb)(2)Zr-3(6) nanoparticles (NPs) that have a large Mn23Th6-type FCC structure with a Zr-octahedron as a motif. Based on direct atomic-scale observations, we discover a new zero-net-strain path for the <112>{111} deformation twinning in FCC structures. To form a [(1) over bar(1) over bar2]/(111) twin, for example, short ((1) over bar(1) over bar1) planes within two adjacent (111) plane layers in the repeated three-layer sequence of (111) planes are shear deformed continuously by a shear-force dipole along the [11 (2) over bar] direction like a domino effect, whereas the other (111) plane in the repeated sequence remains intact. In addition, a loading criterion for deformation twinning of a FCC NP under uniaxial compression is proposed based on our observations. Our work here not only extends the fundamental understanding on deformation twinning in FCC structures, but also opens up studies of deformation behaviors in a class of Mn23Th6-type FCC materials. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
DOI	10.1016/j.jmst.2022.02.043
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000798064400003
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：17[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/321006/174228
专题	中国科学院金属研究所
通讯作者	Li, Geping
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Sci & Technol China, Hefei 230026, Peoples R China 4.Tianjin Univ, Inst Mol Plus, Tianjin 300072, Peoples R China 5.Univ Shanghai Sci & Technol, Sch Mat Sci & Engn, Shanghai 200093, Peoples R China
推荐引用方式 GB/T 7714	Gu, Hengfei,Liu, Chengze,Yuan, Fusen,et al. Deformation twinning in octahedron-based face-centered cubic metallic structures: Localized shear-force dipoles drive atomic displacements[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,126:116-126.
APA	Gu, Hengfei.,Liu, Chengze.,Yuan, Fusen.,Han, Fuzhou.,Zhang, Yingdong.,...&Li, Geping.(2022).Deformation twinning in octahedron-based face-centered cubic metallic structures: Localized shear-force dipoles drive atomic displacements.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,126,116-126.
MLA	Gu, Hengfei,et al."Deformation twinning in octahedron-based face-centered cubic metallic structures: Localized shear-force dipoles drive atomic displacements".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 126(2022):116-126.