In this paper, selective laser sintering (SLS) was applied to join two materials by printing Ti–6Al–4V powder on a Ti substrate without any support parts. The characteristics of the interface between the as-built Ti–6Al–4V sample and the substrate were investigated. The analysis indicates that a heat-affected zone (HAZ) and the fish-scale type were formed at the joining area. The combination of smaller grains, acicular [Formula: see text] martensite, and lamellar [Formula: see text] structures was observed inside the interface zone. The hardness value at the interface area was measured by about 320 HV which is higher than 280 HV of the substrate and smaller than 369 HV of the as-built sample. The results predict that the SLS process is a promising method for manufacturing of hybrid materials.

中文翻译：

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选区激光烧结中 Ti-6Al-4V 样品与 Ti 基体的界面特性

在本文中，选择性激光烧结 (SLS) 通过在没有任何支撑部件的 Ti 基板上印刷 Ti-6Al-4V 粉末来连接两种材料。研究了完工的 Ti-6Al-4V 样品与基板之间的界面特征。分析表明，在接合处形成了热影响区（HAZ）和鱼鳞型。在界面区内观察到较小晶粒、针状[公式：见正文]马氏体和层状[公式：见正文]结构的组合。界面区域的硬度值测量为约320 HV，高于基材的280 HV，小于完工样品的369 HV。结果预测，SLS 工艺是制造混合材料的有前途的方法。