Metal Additive Manufacturing Conference - MAMC 2020

Ti-6Al-4V is used since years for additive manufacturing. The alpha-beta titanium alloy shows an excellent strength-to-weight ratio in combination with superb corrosion resistance. It is one of the most commonly used titanium alloys and is applied in a wide range of applications where low density and excellent protection against gradual destruction by chemical and/or electrochemical reaction with their environment is necessary, like in aerospace industry and biomechanical applications, especially implants and prostheses. To improve the biomechanical interaction there are reflections to replace Ti-6Al-4V by Ti-6Al-7Nb. Since laser melting produced workpieces are brittle a post-process heat treatment is required. Appropriate investigations were done for Ti-6Al-4V manufactured by Laser Powder Bed Fusion (L-PBF) to study the evolution of the microstructure during the heat treatment. We tackle the issue to analyze the modification of the microstructure for the Ti-6Al-7Nb alloy during heat treatment by using a Phase Field Method Based Software