Ti-6Al-4V titanium alloy manufactured by selective laser melting (SLM) has a unique structure and properties. They offer a higher yield and ultimate tensile strengths but lower ductility than traditionally processed samples. SLMed Ti-6Al-4V alloys induced increased ductility but decreased tensile strengths after thermal treatment at 840 °C for 2 hours. Sliding wearing tests and cutting experiments were conducted to further understand the effects of heat treatment on machinability. The result showed that as-built SLMed Ti-6Al-4V samples presented lower coefficients of friction but higher wear rates than heat-treated ones due to their delamination caused by cracks. Cutting forces of as-built samples were lower during milling than that of heat-treated samples. Nevertheless, better surface roughness was produced when heat-treated samples were machined. Moreover, the optimal cutting parameters for both materials were the same.

This content is only available via PDF.
You do not currently have access to this content.