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曹耿华,刘一雄,张大童,郑振兴.时效热处理对水下搅拌摩擦加工WE43镁合金的微观组织及力学性能影响[J].稀有金属材料与工程(英文),2018,47(10):3179~3184.[Cao Genghua,Liu Yixiong,Zhang Datong and Zheng Zhenxing.Effect of Aging Treatment on Microstructure Evolution and Mechanical Properties of Submerged Friction Stir Processed WE43 Alloy[J].Rare Metal Materials and Engineering,2018,47(10):3179~3184.]
Effect of Aging Treatment on Microstructure Evolution and Mechanical Properties of Submerged Friction Stir Processed WE43 Alloy
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Received:December 28, 2016  Revised:May 16, 2017
DOI:
Key words: WE43 alloy  friction stir processing  microstructure  aging treatment  mechanical properties
Foundation item:广东省自然科学基金(2015A030312003,2015A030313668);广东省金属新材料制备与成形重点实验室开放课题(GJ201602)
Author NameAffiliation
Cao Genghua,Liu Yixiong,Zhang Datong and Zheng Zhenxing  
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Abstract:
      In this study, as-cast WE43 alloy was subjected to submerged friction stir processing (SFSP). Microstructural evolution during SFSP and effect of aging treatment on mechanical properties of SFSP specimens were investigated. The results showed that the microstructure of cast WE43 alloy was significantly refined and the mechanical properties were greatly enhanced. After subsequent artificial aging treatment at 66 h for 150 ℃ and 54 h for 180 ℃, strengths of the peak–aged specimens were further increased, which was attributed to the large quantity of β′′ and β1 precipitates, respectively. Meanwhile, elongations of the peak-aged specimens were both decreased, since more crack nucleation sites were provided with the increased precipitates. The failure mechanism of SFSP specimen was ductile fracture mode, while the peak-aged specimens were all mixed ductile–brittle fracture mode.