Effect of heat treatments on fatigue property of selective laser melting AlSi10Mg

被引：134
作者：
Zhang, Changchun [1 ]
Zhu, Haihong [1 ]
Liao, Hailong [1 ]
Cheng, Yong [1 ]
Hu, Zhiheng [1 ]
Zeng, Xiaoyan [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Hubei, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2018年 / 116卷
基金：
中国国家自然科学基金;
关键词：
AlSi10Mg; Fatigue property; Heat treatments; Fatigue fractography; Microstructural transformation; HIGH-CYCLE FATIGUE; MECHANICAL-PROPERTIES; MELTED ALSI10MG; ALLOY; MICROSTRUCTURE; BEHAVIOR; CRACK; SLM; MICROTOMOGRAPHY; ROUGHNESS;
D O I：
10.1016/j.ijfatigue.2018.07.016
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The fatigue property of selective laser melting AlSi10Mg samples with different heat treatments was investigated. The samples were tested in the state of as-built condition, stress relief treatment, solution treatment and solution + artificial aging treatment. It is found that the as-built sample displays the highest fatigue property, and the solution treatment samples exhibit the lowest fatigue property. Heat treatment reduces the fatigue property. The fatigue cracks originate from the surface or subsurface of all the samples, surface or subsurface pores have quite important effect on fatigue property. It is found that the fatigue property is closely related to the yield strength other than ultimate tensile strength or elongation. The change in fatigue property and static mechanical properties is mainly due to the microstructural transformation. Heat treatment changes the size and morphology of Si, which leads to a decrease in fatigue property.
引用
收藏
页码：513 / 522
页数：10
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