Browse > Article

Creep Characteristics of Titanium Alloy(Ti-6Al-4V) at 0.3Tm  

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)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.13, no.3, 2005 , pp. 117-122 More about this Journal
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.
Keywords
크리프 속도;파단 변형율;응력의존성;활성화에너지;수명예측;크리프 파단;주사 전자현미경;파단면 관찰;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 K. C. Hwang and J. H. Yoon, 'Creep Behaviour of Solution Treated Alpha Titanium Alloy for Automotive Parts,' Transactions of KSAE, Vol.13, No.1, pp.153-158, 2005
2 E. N. da C. Andrade, 'On the Viscous Flow in Metals and Allied Phenomena,' Proc. Roy. Soc., Series A, London, UK, Vol.84, pp.1-12, 1910
3 F. R. Larson, and J. Miller, 'A Time- Temperature Relationship for Rupture and Creep Stresses,' Transaction of the ASME, Vol. 74, pp.765-775, 1952
4 W. L. Bradley, S. W. Nam and D. K. Matlock, 'Fatigue Perturbed Creep of Pure Aluminum at Ambient Temperatures,' Met. Trans., Vol.7A, pp.425-430, 1976
5 F. Garofalo, O. Richmond and W. F. Domis, 'Design of Apparatus for Constant Stress or Constant Load Creep Tests,' Trans. of ASME, Series D, J. of Basic Engineering, Vol.84, pp.287-293, June 1962   DOI
6 J. H. Dorn, The Mechanical Behaviour of Materials at Elevated Temperature, McGrawHill, New York, pp.432-443, 1961
7 F. Garofalo, Fundamentals of Creep and Creep-Rupture in Metals, The Macmillian Company, New York, p.258, 1965
8 E. N. da C. Andrade, 'On the Viscous Flow in Metals and Allied Phenomena,' Proc. Roy. Soc., Series A, London, UK, Vol.84, pp.0-12, 1910
9 L. J. Cuddy, 'Internal Stresses and Structures Developed During Creep,' Met. Trans., Vol.1, pp.395-401,1970   DOI