Dislocation configuration and solute redistribution of low angle kink boundaries in an extruded Mg–Zn–Y–Zr alloy

doi:10.1016/j.msea.2017.01.088

	Dislocation configuration and solute redistribution of low angle kink boundaries in an extruded Mg–Zn–Y–Zr alloy
	Peng, Z.Z.1; Shao, X.H.1; Jin, Q.Q.1,2; Liu, J.F.1; Ma, X.L.1,3
刊名	Materials Science and Engineering A
	2017-02-27
卷号	687 页码:211-220
关键词	High resolution transmission electron microscopy High strength alloys Scanning electron microscopy Zircaloy Dislocation configurations Engineering materials HAADF-STEM High-angle annular dark fields Kink Longperiod stacking ordered structure (LPSO) Plastic deformation behavior Solute redistribution
ISSN号	09215093
DOI	10.1016/j.msea.2017.01.088
英文摘要	The microstructural and chemical features of deformation-induced interfaces are one of key issues in engineering materials because they determine plastic deformation behavior and thus affect mechanical properties of the materials. Using atomic-resolution high-angle annular dark-field scanning transmission electron microscopy, we characterized deformation-induced low angle kink boundaries (LAKBs) in long period stacking ordered (LPSO) structures in an extruded Mg–2.3Zn–6.6Y–0.56Zr (wt%) alloy. We clarified that the LAKB in LPSO phase consists of an array of dislocations, while the LAKB in Mg interlayers sandwiched between LPSO phases is composed of an array of dissociated and/or dislocations. Correspondingly, the former and the latter LAKBs are depleted and segregated with Zn/Y/Zr elements, respectively. I2 stacking fault (SF) is meanwhile generated in Mg layers, and its energy is evaluated approximately 0.1–1.6 mJ m−2. Deformation-induced LAKBs, the resultant redistribution of solute elements, and precipitated I2 SFs, are proposed to be responsible for the high strength of extruded Mg alloys containing LPSO structures. © 2017 Elsevier B.V.
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000395839800026
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114787]
专题	学生就业指导服务中心材料科学与工程学院材料科学与工程学院_特聘教授组
作者单位	1.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang; 110016, China; 2.School of Materials Science and Engineering, University of Science and Technology of China, Hefei; 230026, China; 3.School of Materials Science and Engineering, Lanzhou University of Technology, Langongping Road 287, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Peng, Z.Z.,Shao, X.H.,Jin, Q.Q.,et al. Dislocation configuration and solute redistribution of low angle kink boundaries in an extruded Mg–Zn–Y–Zr alloy[J]. Materials Science and Engineering A,2017,687:211-220.
APA	Peng, Z.Z.,Shao, X.H.,Jin, Q.Q.,Liu, J.F.,&Ma, X.L..(2017).Dislocation configuration and solute redistribution of low angle kink boundaries in an extruded Mg–Zn–Y–Zr alloy.Materials Science and Engineering A,687,211-220.
MLA	Peng, Z.Z.,et al."Dislocation configuration and solute redistribution of low angle kink boundaries in an extruded Mg–Zn–Y–Zr alloy".Materials Science and Engineering A 687(2017):211-220.