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Effects of heat treatment on the wear behavior of surfacing AZ91 magnesium alloy

Published online by Cambridge University Press:  07 June 2017

Qingqiang Chen Open the ORCID record for Qingqiang Chen [Opens in a new window] ,
Kaiyue Li ,
Yuyang Liu ,
Zhihao Zhao ,
Kai Tao  and
Qingfeng Zhu
Qingqiang Chen
Affiliation:
School of Materials Science & Engineering, Northeastern University, Shenyang 110819, China
Kaiyue Li
Affiliation:
School of Materials Science & Engineering, Northeastern University, Shenyang 110819, China
Yuyang Liu
Affiliation:
School of Materials Science & Engineering, Northeastern University, Shenyang 110819, China
Zhihao Zhao*
Affiliation:
School of Materials Science & Engineering, Northeastern University, Shenyang 110819, China
Kai Tao
Affiliation:
Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China
Qingfeng Zhu
Affiliation:
Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

The surfacing welding has been widely utilized in the industrial equipment manufacturing and repairs. The wear properties of surfacing alloys have an important effect on the whole performance of repaired components. The solution treatment (T4) and solution treatment followed by aging (T6) effects on the dry sliding wear behavior of surfacing AZ91 magnesium alloys with tungsten inert gas welding were investigated in this work. The results demonstrated that the surfacing alloy without treatment exhibited poor wear resistance, due to the massive intermetallic β-phases (Mg17Al12). These phases were believed to produce stress concentrations in the particle-to-matrix interface and tended to generate cracks during friction. The T4 alloy had more improved wear resistance than the as-received alloy. The T6 treatment improved the wear resistance further, resulting from the high density dispersed fine β-phase precipitation in the α-Mg matrix, which enhanced the alloy strength and hardness and decreased the subsurface metal deformation degree caused by friction.

Keywords

Mgweldingattrition
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 11 , 14 June 2017 , pp. 2161 - 2168
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Jürgen Eckert

References

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