Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Evaluation of Pess Formability for Ti-6Al-4V Sheet at Elevated Temperature

Ti-합금판재(Ti-6Al-4V)의 고온 성형성 평가

  • 박진기 (경북대학교 기계공학부) ;
  • 박노광 (재료 연구소 특수 합금 연구부) ;
  • 김영석 (경북대학교 기계공학부)
  • Received : 2010.02.18
  • Accepted : 2010.04.15
  • Published : 2010.07.01
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Abstract

Titanium alloy sheets have excellent specific strength and corrosion resistance as well as good performance at high temperature. Recently, titanium alloys are widely employed not only for aerospace parts but also for bio prothesis and motorcycle. However, the database is insufficient in the titanium alloy for press forming process. In this study, the effect of temperature on the forming limit diagram was investigated for Ti-6Al-4V titanium alloy sheet through the Hecker‘s punch stretching test at elevated temperature. Experimental results obtained in this study can provide a database for the development of press forming process at elevated temperature of Ti-6Al-4V titanium alloy sheet. From the experimental studies it can be concluded that the formability of Ti-6Al-4V titanium alloy sheet is governed by the ductile failure for the testing temperature. The formability of Ti-6Al-4V titanium alloy sheet at $700^{\circ}C$ increases about 7 times compared with that at room temperature.

Keywords

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