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Investment Casting and Hot Forming of TiAl Alloy

更新时间:2015-6-8 15:03:27  点击:0

报告人 陈玉勇
报告标题 Investment Casting and Hot Forming of TiAl Alloy
报告摘要 TiAl alloys are considered as one of the most promising novel light-weight, high-temperature structure materials applied to aerospace and civil industry due to their low density, excellent high temperature strength and creep resistance. This paper reviews the investment casting, forging and rolling of TiAl alloys based on the research in Harbin Institute of Technology. Aimed at the development of key technology in the investment casting of TiAl typical engine inlet component, the fabrication of unique ceramic moulds for investment casting of TiAl alloys, mould-filling characteristics, numerical simulation and practical pouring experiment, interfacial reactions between TiAl castings and zirconia ceramic mould, high temperature oxidation resistance of TiAl alloys were carried out and identified. The wrought processes of TiAl alloys were summarized. Their hot-deformation behaviors, hot processing technologies, heat treatment process, microstructure and mechanical properties were investigated systematically. The development trend of gamma TiA-l based alloys was also presented.
报告人简介 Chen Yuyong, received Ph.D in Harbin Institute of Technology at 1985. Senior visiting scholar in University at Buffalo, the State University of New York during 1992 to 1994 and senior researching scholar in University of Sheffield in 2005. Professor of school of Materials Science and Engineering, Harbin Institute of Technology, Ministry of Science “973” project chief scientist. Institute member of Foundry institute of Chinese mechanical engineering society and Society of intermetallics and amorphous, Institute director of foundry society of Heilongjiang province.    
The main research fields include solidification and microstructure control, investment casting and precision hot-forming technology of titanium-aluminum alloys, titanium alloy, titanium matrix composites, aluminium alloy and copper alloy. A variety of complex Ti, TiAl and Ti matrix composite casting components have been fabricated successfully by precision investment casting using special ceramic moulds. Also the special pack-forging and pack-rolling technologies for Ti, TiAl and Ti matrix composite are developed.
The main projects include “973” Project, “863” Project, National Science and Technology Major Project, National Science Foundation, defense research foundation, aerospace research foundation and more than 40 other national and provincial research projects; one First Prize of Heilongjiang Provincial and Ministerial Science and Technology, eight provincial and ministerial Second Prize and two provincial and ministerial third Prize are earned; 20 national invention patents are authorized; a monograph is published and more than 200 papers has been published at international journals, in which more than 150 papers are indexed by SCI or EI. 
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