u形缺口增材制造AlSi10Mg零件的疲劳性能:化学和热后处理的影响

IF 4.2 Q2 ENGINEERING, MANUFACTURING Additive manufacturing letters Pub Date : 2023-09-27 DOI:10.1016/j.addlet.2023.100175
Erfan Maleki , Sara Bagherifard , Nabeel Ahmad , Shuai Shao , Okan Unal , Mario Guagliano , Nima Shamsaei
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引用次数: 0

摘要

在本研究中,全面研究了不同的后处理方法,包括热处理(HT)和电化学抛光(ECP)及其组合对U型缺口激光粉末床熔融AlSi10Mg试样表面织构、孔隙率、微观结构、力学性能和旋转弯曲疲劳行为的影响。此外,为了更好地了解所应用的后处理方法对缺口试样对表面和近表面缺陷敏感性的影响,进行了有限元分析。化学处理对极窄缺口零件的表面织构改性有很大影响,其他处理的应用可能非常具有挑战性。研究还发现,缺口试样的疲劳行为对表面织构比对近表面缺陷更敏感。HT+ECP的混合处理对改善疲劳行为最有效,因为同时使微观结构均匀化,释放拉伸残余应力,增强延展性和高表面织构改性。
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Fatigue performance of U-notched additively manufactured AlSi10Mg parts: The effects of chemical and thermal post-treatments

In the current study, the effects of different post-processing methods, including heat treatment (HT) and electro-chemical polishing (ECP) as well as their combination on the surface texture, porosity, microstructure, mechanical properties, and rotating bending fatigue behavior of U-notched laser powder bed fused AlSi10Mg specimens were comprehensively investigated. In addition, to better understand the effects of the applied post-processing methods on the sensitivity of the notched specimen to surface and near-surface defects, finite element analysis was performed. Chemical treatment was found to be very influential on surface texture modification of the very narrow notched parts, for which the application of other treatments can be quite challenging. It was also found that the fatigue behavior of the notched specimens was more sensitive to the surface texture rather than to the near-surface defects. The hybrid treatment involving HT+ECP was the most effective for fatigue behavior improvement due to simultaneous homogenization of the microstructure, released tensile residual stresses, enhanced ductility and high surface texture modification.

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来源期刊
Additive manufacturing letters
Additive manufacturing letters Materials Science (General), Industrial and Manufacturing Engineering, Mechanics of Materials
CiteScore
3.70
自引率
0.00%
发文量
0
审稿时长
37 days
期刊最新文献
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