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Creep Behavior of 9% Ni Alloy Steel at Elevated Temperatures

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주제분류해양공학

초록

Little design data is available for the creep life prediction of 9% Ni alloy in elevated temperatures. Therefore, in this study, a series of creep tests under 16 combined conditions with 4 kinds of stresses and 4 temperatures was performed to obtain creep design and life prediction data for 9% Ni alloy, with the following results. The stress exponents decreased as the test temperature increased. The creep activation energy gradually decreased as the stresses became larger. The Larson-Miller parameter (LMP) constant for this alloy was estimated to be about 2.

Abstract

Little design data is available for the creep life prediction of 9% Ni alloy in elevated temperatures. Therefore, in this study, a series of creep tests under 16 combined conditions with 4 kinds of stresses and 4 temperatures was performed to obtain creep design and life prediction data for 9% Ni alloy, with the following results. The stress exponents decreased as the test temperature increased. The creep activation energy gradually decreased as the stresses became larger. The Larson-Miller parameter (LMP) constant for this alloy was estimated to be about 2.

참고문헌 (13)

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  3. Baek, U.B, "Creep- Fatigue Crack Growth at Cr-Mo Steel Weld Interface", Trans. of KSME, A, 24(12), pp.3088~3095 (2000)
  4. Bradley, W.L, "Fatigue and Creep of Pure Aluminum at Ambient Temperatures", Met. Trans, 7, pp.425~430 (1976)
  5. Cuddy,L.J, "Internal Stresses and Structures Developed during Creep", Met. Trans, 1, pp.395~401 (1970)
  6. Dorn, J.E, "Creep and Fracture of Metals at High Temperatures", NPL Symposium, pp.89~ (1956), H.M.S.O
  7. Garofalo, F, "Fundamentals of Creep and Creep Rupture in Metals", The Macmillan Co, pp.258~ (1965)
  8. Garofalo, F, "Design of Apparatus for Constant Stress or Constant Load Creep Tests", J. of Basic Eng, pp.278~293 (1962)
  9. Hwang, K.C, "Creep Behaviors of α- Titanium Alloy, The Korean Society of Automotive Engineers", Proc. of Annual Autumn Conference, pp.68~75 (2004)
  10. Hwang, K.C, "Static Creep Behaviors of Pure Copper, The Korean Society of Automotive Engineers", Proc. of Annual Spring Conference, pp.950~956 (2005)
  11. Larson, F.R, "A Time Temperature Relationship for Rupture and Creep stresses", pp.765~775 (1952), Transaction of the ASME
  12. A Linear Time- Temperature Relation for Extrapolation of Creep and Stress Rupture Data, "Manson, S.S", National Aeronautics and Space Administration, ~, pp.NASA-TN-2890 (1953)
  13. Suh, C.M, "Micro-Surface- Cracks Behavior of 304 Stainless Steel under Creep- Fatigue Interaction at Elevated Temperature", J. of Ocean Eng. and Technology, 2(2), pp.304~311 (1988)

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