This paper explores the influence of sample thickness and build orientation on the microstructure and mechanical properties of electron beam melting (EBM) additive manufactured Ti-6Al-4V titanium alloy and compared to previously published work on SLM-processed material. In particular, the various mechanical properties (tensile yield strength, ultimate tensile strength) were investigated with attempts to correlate with various microstructural features, including lamellae thickness, porosity and the size of prior-beta grains. However, it is shown that the surface exerts a dominant effect on mechanical properties with as-deposited surfaces. These observations provide the possibility for the further improvement of processing/property relations with as-deposited surfaces.

中文翻译：

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构造尺寸和取向对粉末床熔覆钛零件力学性能的影响

本文探讨了样品厚度和构造方向对电子束熔化（EBM）添加剂制造的Ti-6Al-4V钛合金的微观结构和力学性能的影响，并与先前发表的关于SLM处理材料的工作进行了比较。特别是，研究了各种机械性能（拉伸屈服强度，极限抗拉强度），并试图与各种微观结构特征相关，包括薄片厚度，孔隙率和先验β晶粒的尺寸。然而，已表明，表面对沉积态的表面的机械性能起主要作用。这些观察结果为进一步改善与沉积表面的加工/特性关系提供了可能性。