Solid solution and precipitation strengthening effects in basal slip, extension twinning and pyramidal slip in Mg-Zn alloys

doi:10.1016/j.actamat.2021.117374

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Solid solution and precipitation strengthening effects in basal slip, extension twinning and pyramidal slip in Mg-Zn alloys
	Li N 3,4; Wang C 2; Monclus MA 4; Yang L 1; Molina-Aldareguia JM 4
刊名	ACTA MATERIALIA
	2021-12-01
卷号	221 页码:11
关键词	Mg alloys Diffusion couples Solid solution Precipitation strengthening Basal slip Extension twinning
ISSN号	1359-6454
DOI	10.1016/j.actamat.2021.117374
通讯作者	Yang, L.(lingwei.yang@cardc.cn) ; Molina-Aldareguia, J. M.(jon.molina@imdea.org)
英文摘要	A high-throughput methodology is proposed, based on the combination of diffusion couples and ad-vanced nanomechanical testing methods, to directly measure alloying effects on the critical resolved shear stress (CRSS) of individual deformation modes in Mg alloys. The methodology is tested in Mg-Zn alloys by assessing the alloying effects, up to Zn contents of 2 at.%, on basal slip, extension twining and pyramidal slip in two metallurgical conditions: as-quenched, for which the Zn solute atoms remain homogenously dispersed in solid solution; and peak-aged, for which the Zn atoms form rod-shape beta(1)' (MgZn2) pre-cipitates. A combined approach including micromechanical testing, transmission Kikuchi diffraction, and high-resolution transmission electron microscopy was performed to reveal the corresponding deformation mechanisms. It was found that the CRSS enhancement for basal slip and extension twinning by MgZn2 precipitates is considerably larger than the effect of Zn in solid solution, while the strengthening of pyra-midal slip is similar in both cases. As a result, the anisotropy ratios remain high and similar to pure Mg in the solid solution strengthened Mg-Zn alloys. However, they are substantially reduced in precipitation strengthened Mg-Zn alloys. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
分类号	一类
资助项目	Madrid Region[S2018/NMT-4381] ; MAT4.0 project (Spain) ; Spanish Ministry of Science and Innovation[PID2019-109962RB-I00] ; China Scholarship Council[201506020081] ; China Scholarship Council[201406290011]
WOS关键词	RESOLVED SHEAR-STRESS ; ELECTRON-MICROSCOPY ; PRISMATIC-SLIP ; NUCLEATION ; MECHANISMS ; GROWTH ; AL ; DISLOCATIONS ; TEMPERATURE ; ORIENTATION
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000715005500004
资助机构	Madrid Region ; MAT4.0 project (Spain) ; Spanish Ministry of Science and Innovation ; China Scholarship Council
其他责任者	Yang, L. ; Molina-Aldareguia, J. M.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/87957]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.China Aerodynam Res & Dev Ctr, Hyperveloc Aerodynam Inst, Mianyang 621000, Sichuan, Peoples R China 2.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China; 3.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China; 4.IMDEA Mat Inst, C Eric Kandel 2, Madrid 28906, Spain;
推荐引用方式 GB/T 7714	Li N,Wang C,Monclus MA,et al. Solid solution and precipitation strengthening effects in basal slip, extension twinning and pyramidal slip in Mg-Zn alloys[J]. ACTA MATERIALIA,2021,221:11.
APA	Li N,Wang C,Monclus MA,Yang L,&Molina-Aldareguia JM.(2021).Solid solution and precipitation strengthening effects in basal slip, extension twinning and pyramidal slip in Mg-Zn alloys.ACTA MATERIALIA,221,11.
MLA	Li N,et al."Solid solution and precipitation strengthening effects in basal slip, extension twinning and pyramidal slip in Mg-Zn alloys".ACTA MATERIALIA 221(2021):11.