Abstract In this study, the first attempt was made to synthesize a Ti–Au alloy by fusing two titanium plates and a thin gold foil between them using the small-scale resistance spot welding procedure. The main goal was to study the possibility of controlling the alloy synthesis process by predefined thermal cycles (metal heating and its cooling rate). The Ti–Au alloy microstructure, chemical and phase compositions, as well as hardness distributions were studied by scanning and transmission electron microscopy, energy dispersive X-ray analysis, and nanoindentation. As a result, a weld nugget with optimal sizes for titanium alloys was formed. The average gold content in the synthesized Ti–Au alloy was about 16 at. % (42 wt %). It was distributed rather evenly throughout the nugget volume in ratios of 10–20 at. % (30–50 wt %). In addition to α-Ti and Au particles, the alloy included the Ti3Au and TiAu2 compounds corresponding to the gold content of 25 and 67 at. %, respectively. These compounds had formed in microvolumes contained high gold concentrations for a period of less than 3 ms. Hardness values were from 6 up to 7 GPa in the regions most enriched in gold, and they were about 4 GPa where the gold content was minimal. Based on the obtained results, some ways were proposed for the possible optimization of this research method.

中文翻译：

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可控电阻熔融法合成的 Ti-Au 合金的冶金

摘要 在这项研究中，首次尝试通过使用小规模电阻点焊工艺将两块钛板和它们之间的薄金箔熔合来合成 Ti-Au 合金。主要目标是研究通过预定义的热循环（金属加热及其冷却速率）控制合金合成过程的可能性。通过扫描和透射电子显微镜、能量色散 X 射线分析和纳米压痕研究 Ti-Au 合金的微观结构、化学和相组成以及硬度分布。结果，形成了具有最佳尺寸的钛合金焊核。合成的 Ti-Au 合金中的平均金含量约为 16 at。%（42 重量%）。它以 10-20 at 的比例均匀地分布在整个金块体积中。%（30–50 重量%）。除了 α-Ti 和 Au 颗粒外，合金还包括 Ti3Au 和 TiAu2 化合物，对应的金含量分别为 25 和 67 at。％， 分别。这些化合物在小于 3 ms 的时间内以含有高浓度金的微量形式形成。在金含量最丰富的地区，硬度值从 6 到 7 GPa，而在金含量最少的地区，它们的硬度值约为 4 GPa。根据获得的结果，提出了一些可能优化该研究方法的方法。它们大约为 4 GPa，其中含金量最少。根据获得的结果，提出了一些可能优化该研究方法的方法。它们大约为 4 GPa，其中含金量最少。根据获得的结果，提出了一些可能优化该研究方法的方法。