Min-Tsang Tsai
Asia University, Republic of China
Biography
M T Tsai is a Postdoctoral fellow in the 3D Printing Medical Research Institute at Asia University in Taiwan. He has completed his PhD at National Sun Yat-sen University, Republic of China in 2018. His research fields include nano/micro scaled mechanical behavior and microstructure. Currently, his main research is focused on aluminum- scandium alloys by additive manufacturing.
Abstract
In recent years, additive manufacturing (AM) technology, especially powder bed fusion method has been well developed. One of the powder bed fusion technologies is called electron beam additive manufacturing (EBAM). The microstructure of EBAM parts of the Ti-6Al-4V alloy is usually characterized by the acicular martensitic alpha (ï¡) and fine lamellar Widmanstätten (ï¡+ï¢) structure inside the prior ï¢ grain. However, there are challenges to control the volume fractions between different phases during this process. In this study, the effect of energy input on the microstructure of Ti-6Al-4V samples fabricated by EBAM is examined. The processing parameters of energy input are designed by the prediction of thermal field simulation. The relationship between the current input and the microstructure evolution is clarified by analyzing the volume fractions of different phases and the mechanical properties. The results show that the energy input would influence the microstructure of the samples made by EBAM and thus would differ in the mechanical properties accordingly.