Professor, Kyushu University, Japan

Hideshi Miura is Professor Emeritus and Professor of Research Center for Steel in Kyushu University and he is the leading Japanese academics in Powder Metallurgy. He was a past President of Japan Society of Powder & Powder Metallurgy (JSPM) and was Co-chair of the 2012 P/M World Congress in Yokohama.
He has led significant developments in ferrous press & sinter and MIM technologies, and recently developed laser-based AM for Ti alloys and superalloys.
He has contributed over 300 papers, 1 book (Translated the Powder Metallurgy Science written by R. M. German), 12 patents, and 20 edited books.
He received more than 25 Awards from JSPM, Japan Society of Mechanical Engineering, Japan Institute of Metals, The Iron and Steel Institute of Japan, and also received The American Powder Metallurgy Institute International Fellow Award in 2016.

Speech Title: Development of High Strength Ti Alloy Compacts through MIM process

Abstract: Ti-6Al-4V is the most common Ti alloy and has been used in various industrial fields including aerospace and power plant because of their high tensile strength, high fatigue strength and light weight. However, their low thermal conductivity, high hardness and low Young’s modulus make them difficult to produce the complicated shapes via machining. On the other hand, metal injection molding process offers net shape production, high design flexibility, and high cost efficiency, which is useful for forming the materials with poor workability such as Ti alloys. In our previous studies, the injection molded Ti-6Al-4V alloy compacts were improved the properties by addition of third elements such as Cr and Mo, and they showed high tensile strength and high elongation comparable to wrought materials. However, the fatigue strength was significantly lower than that of wrought materials. In order to improve the fatigue strength of injection molded Ti-6Al-4V alloy compacts, refining of microstructure was treated by addition third elements including TiB2 powders. Eventually, we obtained the same fatigue strength as that of wrought materials. In addition, the relationship of grain size and fatigue strength showed good agreement with Hall-Petch relations.