This paper describes the experimental study of strength characteristics and the microstructure of a permanent joint of dissimilar materials (VT20 titanium alloy and V-1461 aluminum alloy), obtained by laser butt welding. Optical and electron microscopy, X-ray spectral and phase analysis, and the transmission diffraction method with the help of synchrotron radiation are all used to investigate the properties of a weld. It is shown that the laser radiation offset relative to the contact surface of dissimilar materials significantly changes the microstructure and phase composition of the intermetallic interlayer formed between the materials welded, thereby affecting the strength of dissimilar welded joints.

中文翻译：

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基于 VT20 钛和 V-1461 铝合金的异种材料的激光焊接

本文描述了通过激光对焊获得的异种材料（VT20 钛合金和 V-1461 铝合金）永久接头的强度特性和微观结构的实验研究。光学和电子显微镜、X 射线光谱和相位分析以及借助同步辐射的透射衍射法都用于研究焊缝的性能。结果表明，激光辐射相对于异种材料接触面的偏移显着改变了焊接材料之间形成的金属间夹层的组织和相组成，从而影响了异种焊接接头的强度。