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Effects of Friction Stir Processing Parameters and In Situ Passes on Microstructure and Tensile Properties of Al-Si-Mg Casting
G. R. Cui; D. R. Ni; Z. Y. Ma; S. X. Li
2014
Source PublicationMetallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN1073-5623
Volume45AIssue:12Pages:5318-5331
AbstractFriction stir processing (FSP) was applied to modify the microstructure of an as-cast A356 alloy. The effects of rotation rate, travel speed, in situ FSP pass, FSP direction, and artificial aging on microstructures and tensile properties were investigated. FSP broke up the coarse eutectic Si phase into 2.5 to 3.5 mu m particles and distributed them homogeneously, and resulted in the dissolution of the coarse Mg2Si particles and the elimination of porosity, thereby improving both the strength and the ductility of the casting. Increasing the rotation rate was beneficial to breaking up and dissolving the particles, but it contributed little to eliminating the porosity. The travel speed did not affect the size of the particles apparently, but lower speed was beneficial to eliminating the porosity. 2-pass FSP showed an obvious advantage in the microstructure modification and tensile properties compared with the single-pass. However, a further increase of FSP passes only resulted in slight improvement. The FSP direction of the following pass did not show distinct effect on the microstructure and tensile properties. After post-FSP artificial aging, the strengthening phase (beta aEuro(3)-Mg2Si) precipitated, which increased the strength and decreased the ductility of the FSP samples.
description.department[cui, g. r. ; ni, d. r. ; ma, z. y. ; li, s. x.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; ma, zy (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china. ; zyma@imr.ac.cn
KeywordMechanical-properties Fatigue Behavior Aluminum-alloys A356 Aluminum Particles Variables Fsp
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Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73208
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
G. R. Cui,D. R. Ni,Z. Y. Ma,et al. Effects of Friction Stir Processing Parameters and In Situ Passes on Microstructure and Tensile Properties of Al-Si-Mg Casting[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2014,45A(12):5318-5331.
APA G. R. Cui,D. R. Ni,Z. Y. Ma,&S. X. Li.(2014).Effects of Friction Stir Processing Parameters and In Situ Passes on Microstructure and Tensile Properties of Al-Si-Mg Casting.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,45A(12),5318-5331.
MLA G. R. Cui,et al."Effects of Friction Stir Processing Parameters and In Situ Passes on Microstructure and Tensile Properties of Al-Si-Mg Casting".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 45A.12(2014):5318-5331.
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