Fatigue performance evaluation of selective laser melted Ti-6Al-4V
Fatigue performance evaluation of selective laser melted Ti-6Al-4V
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DOI：
10.1016/j.msea.2014.01.041
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发表时间：
2014-03-26
期刊：
影响因子：
6.4
通讯作者：
Ramulu, M.
中科院分区：
文献类型：
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作者：
Edwards, P.;Ramulu, M.
钛部件的增材制造有望在制造和使用过程中带来降低成本、重量和碳排放等好处。为了充分利用这些优势，必须证明增材制造生产的零件的机械性能可以满足通常基于锻造材料性能特性的设计要求。对于安全关键结构而言，特别值得关注的是增材制造生产的零件的疲劳特性。本研究评估了由选择性激光熔化增材制造工艺生产的Ti-6Al-4V试样的疲劳性能。据发现，疲劳寿命显着低于锻造材料相比。疲劳性能的降低归因于各种问题，例如微观结构、孔隙率、表面光洁度和残余应力。还发现与样本构建方向相关的疲劳性能存在高度各向异性。(C)2014爱思唯尔有限公司版权所有。
Additive Manufacturing of titanium components holds promise to deliver benefits such as reduced cost, weight and carbon emissions during both manufacture and use. To capitalize on these benefits, it must be shown that the mechanical performance of parts produced by Additive Manufacturing can meet design requirements that are typically based on wrought material performance properties. Of particular concern for safety critical structures are the fatigue properties of parts produced by Additive Manufacturing. This research evaluates the fatigue properties of Ti-6Al-4V specimens produced by the Selective Laser Melting additive manufacturing process. It was found that the fatigue life is significantly lower compared to wrought material. This reduction in fatigue performance was attributed to a variety of issues, such as microstructure, porosity, surface finish and residual stress. There was also found to be a high degree of anisotropy in the fatigue performance associated with the specimen build orientation. (C) 2014 Elsevier B.V. All rights reserved.