Abstract

The microstructure and phase composition of electron beam welded Ti-6Al-4V titanium alloy were studied by optical and scanning electron microscopy, backscattered electron diffraction, and X-ray diffraction analysis. Deep-penetration electron beam welds were made in a single pass on rectangular Ti-6Al-4V samples obtained by rolling and wire-feed electron beam additive manufacturing. It was found that the weld width in the 3D printed Ti-6Al-4V samples is greater than in the rolled material. The influence of the vapor capillary on the size, shape and structure of primary β grains formed in the fusion zone was shown. The variation of the penetration coefficient, volume fraction of the residual β phase, and residual stresses along the weld length was studied for Ti-6Al-4V samples obtained by both rolling and 3D printing.

中文翻译：

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轧制与送丝电子束增材制造 Ti-6Al-4V 样品焊缝显微组织对比分析

摘要

通过光学和扫描电子显微镜、背散射电子衍射和X射线衍射分析研究了电子束焊接Ti-6Al-4V钛合金的显微组织和相组成。在通过轧制和送丝电子束增材制造获得的矩形 Ti-6Al-4V 样品上进行单道深熔电子束焊接。研究发现，3D 打印 Ti-6Al-4V 样品的焊缝宽度大于轧制材料的焊缝宽度。显示了蒸汽毛细管对熔融区形成的初生β晶粒的尺寸、形状和结构的影响。研究了通过轧制和 3D 打印获得的 Ti-6Al-4V 样品的熔深系数、残余 β 相的体积分数和残余应力沿焊缝长度的变化。