HARDENING BEHAVIOR OF THE AS-CAST Al-Mg-Sc-Zr ALLOY

doi:10.3724/SP.J.1037.2010.00645

IMR OpenIR

	HARDENING BEHAVIOR OF THE AS-CAST Al-Mg-Sc-Zr ALLOY
	Du Gang; Yang Wen; Yan Desheng; Rong Lijian
通讯作者	Rong Lijian(ljrong@imr.ac.cn)
	2011-03-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	47 期号:3 页码:311-316
摘要	Addition of minor Sc and Zr to the Al-Mg alloys can effectively improve the recrystallization temperature and strength of the alloys due to the formation of L1(2) structured Al-3(Sc, Zr) precipitates. To optimize the mechanical properties of the Al-Mg-Sc-Zr alloys, it is important to understand the precipitation behavior of the Al-3(Sc, Zr) precipitates and the corresponding strengthening effect during the annealing of Al-Mg-Sc-Zr alloys. In this work, isothermal annealing at the temperatures between 250 and 450 degrees C was conducted to study the precipitation behavior of Al-3(Sc, Zr) particles in the as-cast Al-6Mg-0.2Sc-0.15Zr alloy (mass fraction, %). The results show that dramatic precipitation hardening occurred with the formation of the coherent Al-3(Sc, Zr) precipitates during the annealing. Precipitation process of the Al-3(Sc, Zr) accelerates with the increase of the annealing temperature. After the sample was annealed at 300 degrees C for 24 h, the Al-3(Sc, Zr) particles were in a size of 5 nm and the yield strength of the as-cast alloy can be increased by 90 MPa. Severe coarsening of Al-3(Sc, Zr) occurred when the annealing temperature is above 400 degrees C. After annealed at 450 degrees C for 24 h, average particle size of Al-3(Sc, Zr) particles was found increase to 30 nm, with the corresponding precipitation strengthening effect to be about 30 MPa.
关键词	Al-Mg-Sc-Zr alloy annealing precipitation strengthening microstructure
DOI	10.3724/SP.J.1037.2010.00645
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000289587300009
出版者	SCIENCE PRESS
引用统计	被引频次：10[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/321006/106602
专题	中国科学院金属研究所
通讯作者	Rong Lijian
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Du Gang,Yang Wen,Yan Desheng,et al. HARDENING BEHAVIOR OF THE AS-CAST Al-Mg-Sc-Zr ALLOY[J]. ACTA METALLURGICA SINICA,2011,47(3):311-316.
APA	Du Gang,Yang Wen,Yan Desheng,&Rong Lijian.(2011).HARDENING BEHAVIOR OF THE AS-CAST Al-Mg-Sc-Zr ALLOY.ACTA METALLURGICA SINICA,47(3),311-316.
MLA	Du Gang,et al."HARDENING BEHAVIOR OF THE AS-CAST Al-Mg-Sc-Zr ALLOY".ACTA METALLURGICA SINICA 47.3(2011):311-316.