Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Creep Characteristics of Titanium Alloy(Ti-6Al-4V) at 0.3Tm

티타늄합금(Ti-6Al-4V)의 0.3Tm에서 크리프 특성

  • Yoon Jongho (School of Mechanical and Automotive Engineering, Kyungil University) ;
  • Hwang Kyungchoon (School of Mechanical and Automotive Engineering, Kyungil University) ;
  • Woo Hyun-Gu (School of Mechanical and Automotive Engineering, Kyungil University)
  • 윤종호 (경일대학교 기계자동차학부) ;
  • 황경충 (경일대학교 기계자동차학부) ;
  • 우현구 (경일대학교 기계자동차학부)
  • Published : 2005.05.01
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Abstract

Titanium alloy has widely been used as material for glasses frame parts because it has high specific strength. It is also light and harmless to human body. However, we have little design data about the mechanical properties such as the creep behaviors of the alloy. Therefore, in this study, creep tests under four constant stress conditions have been conducted with four different temperature conditions. A series of creep tests had been performed to get the basic design data and life prediction of titanium products and we have gotten the following results. First, the stress exponents decrease as the test temperatures increased. Secondly, the creep activation energy gradually decrease as the stresses became bigger. Thirdly, the constant of Larson-Miller parameter on this alloy was estimated as about 2.5. Finally, the fractographs at the creep rupture showed the ductile fracture due to the intergranullar rupture and some dimples.

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References

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