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Effects of defects on tensile and fatigue behaviors of selective laser melted titanium alloy in very high cycle regime
International Journal of Fatigue ( IF 6 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.ijfatigue.2020.105795
Fulin Liu , Chao He , Yao Chen , Hong Zhang , Qingyuan Wang , Yongjie Liu

Abstract Tensile and fatigue behaviors of selective laser melted titanium alloy were investigated in the as-built condition. The alloy has a high defect density, and its tensile properties are comparable to those of wrought alloys, but the fatigue strength is significantly reduced. The FGA plastic zone is similar to the martensite laths width. The critical size of fatigue failure is analyzed by the K-T diagram. A new value is obtained based on the defect characteristics. Using the probability statistical, the maximum effective size of the defect considering the shape was calculated, and the competitive relationship of the defects was analyzed by volume density.

中文翻译:

缺陷对高循环条件下选择性激光熔化钛合金拉伸和疲劳行为的影响

摘要 研究了选区激光熔化钛合金在竣工状态下的拉伸和疲劳行为。该合金具有较高的缺陷密度,其拉伸性能与锻造合金相当,但疲劳强度明显降低。FGA 塑性区类似于马氏体板条宽度。通过KT图分析疲劳失效的临界尺寸。基于缺陷特性获得新值。利用概率统计,计算出考虑形状的缺陷的最大有效尺寸,并通过体积密度分析缺陷的竞争关系。
更新日期:2020-11-01
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