Deformation-induced dissolution and growth of precipitates in an Al-Mg-Er alloy during high-cycle fatigue

IMR OpenIR

	Deformation-induced dissolution and growth of precipitates in an Al-Mg-Er alloy during high-cycle fatigue
	M. Song; K. Du; Z. Y. Huang; H. Huang; Z. R. Nie; H. Q. Ye
	2014
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	81 页码:409-419
摘要	The dissolution and growth of Al-3(Er,Zr) precipitates during tensile fatigue experiments were investigated by quasi-in situ and postmortem scanning transmission electron microscopy with Z contrast imaging and X-ray energy dispersive spectroscopy. Al-3(Er,Zr) particles were observed with both non-core shell and core shell structures, which were formed during multiple-stage precipitations, in an Al-Mg-Er alloy. After fatigue deformations, the average size of the non-core shell structured precipitates increased significantly. By tracing the same precipitate particles before and after a high-cycle fatigue test, quasi-in situ electron microscopy revealed that the increase of average particle size is associated with the substantial dissolution of small non-core shell structured Al-3(Er,Zr) particles, whose diameters are generally less than 15 nm, and a consequent growth of larger non-core shell Al-3(Er,Zr) precipitates. On the contrary, the core shell structured Al-3(Er,Zr) precipitates remain stable during high-cycle fatigue tests. Possible mechanisms for the dissolution and growth of non-core shell structured Al-3(Er,Zr) precipitates are discussed in terms of particle size, interfacial energy and lattice mismatch, in comparison to the stable core shell structured precipitates. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[song, m. ; du, k. ; huang, z. y. ; ye, h. q.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [huang, h. ; nie, z. r.] beijing univ technol, sch mat sci & engn, beijing 100022, peoples r china. ; du, k (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; kuidu@imr.ac.cn
关键词	Al-mg-er Alloy Al-3(Er,Zr) Precipitates Fatigue Quasi-in Situ Transmission Electron Microscopy (Tem) Mechanical-properties Elevated-temperatures Electron-microscopy Zr Alloys Microstructure Behavior Evolution Coherency Ambient Erbium
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73370
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	M. Song,K. Du,Z. Y. Huang,et al. Deformation-induced dissolution and growth of precipitates in an Al-Mg-Er alloy during high-cycle fatigue[J]. Acta Materialia,2014,81:409-419.
APA	M. Song,K. Du,Z. Y. Huang,H. Huang,Z. R. Nie,&H. Q. Ye.(2014).Deformation-induced dissolution and growth of precipitates in an Al-Mg-Er alloy during high-cycle fatigue.Acta Materialia,81,409-419.
MLA	M. Song,et al."Deformation-induced dissolution and growth of precipitates in an Al-Mg-Er alloy during high-cycle fatigue".Acta Materialia 81(2014):409-419.