|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||GAT-2017 (Gamma Alloys Technology - 2017)
||F-34: Joining Process of Gamma-TiAl and Structural Steel with Insert Metals by Friction Welding
||Myunghoon Oh, Jongmoon Park, Kiyoung Kim, Kyoungkyun Kim, Ho Seung Jang, Younghwan Hong
|On-Site Speaker (Planned)
In this study, the microstructure and related mechanical properties of friction welded TiAl(superior characteristic high temperature & specific strength) and SCM440(alloy steel for machine structural use) were investigated. The friction welding was performed using a servo-motor type friction welding machine for control the several variables. Experimental variables were changed in order to bond the test pieces TiAl-Cu-SCM440, TiAl-Ni-SCM440.Scanning electron microscopy (SEM) was used to observe microstructural evolution taking place during friction welding.It was found that several variable (upset, upset time, rpm, force, etc) changes could be caused by different heat-affected zone size, welding flash shape, microstructure and resulted in hardness changes in welded zone. It is necessary to prevent the formation of the intermetallic compound layer. In order to increase bond strength, we used insert metals (Cu, Ni). As a result, we could confirm to change with type and thickness of insert metal.
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