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HARDENING BEHAVIOR OF THE AS-CAST Al-Mg-Sc-Zr ALLOY
Du Gang; Yang Wen; Yan Desheng; Rong Lijian
Corresponding AuthorRong Lijian(ljrong@imr.ac.cn)
2011-03-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume47Issue:3Pages:311-316
AbstractAddition 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.
KeywordAl-Mg-Sc-Zr alloy annealing precipitation strengthening microstructure
DOI10.3724/SP.J.1037.2010.00645
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000289587300009
PublisherSCIENCE PRESS
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/106602
Collection中国科学院金属研究所
Corresponding AuthorRong Lijian
AffiliationChinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
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.
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