니켈기 초내열합금 Alloy718의 고온 크리프 파단 특성
High Temperature Creep Rupture Characteristics of Ni-Based Alloy718
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The short-term high temperature creep rupture behavior of Ni-based Alloy718 steel was investigated at the elevated temperatures range of 550 to 700℃ under constant stress conditions. The creep rupture characteristics such as creep stress, rupture time, steady state creep rate, and initial strain were evaluated. Creep stress has a quantitative correlation between creep rupture time and steady state creep rate. The stress exponents (n, m) of the experimental data at 550, 600, 650 and 700℃ were derived as 33.5, -24.9, 26.1, -21.2, 16.8, -12.8 and 10, -8.2, respectively. The stress exponent decreased with increasing creep temperature. The creep life prediction was derived by the Larson-Miller parameter (LMP) method and the resultant equation was obtained as follows: T(logtr+20)=-0.00252σ2-1.377σ+22718.
Abstract
The short-term high temperature creep rupture behavior of Ni-based Alloy718 steel was investigated at the elevated temperatures range of 550 to 700℃ under constant stress conditions. The creep rupture characteristics such as creep stress, rupture time, steady state creep rate, and initial strain were evaluated. Creep stress has a quantitative correlation between creep rupture time and steady state creep rate. The stress exponents (n, m) of the experimental data at 550, 600, 650 and 700℃ were derived as 33.5, -24.9, 26.1, -21.2, 16.8, -12.8 and 10, -8.2, respectively. The stress exponent decreased with increasing creep temperature. The creep life prediction was derived by the Larson-Miller parameter (LMP) method and the resultant equation was obtained as follows: T(logtr+20)=-0.00252σ2-1.377σ+22718.
참고문헌 (7)
- 권상우, "Alloy718 마찰접합조건의 최적화와 비파괴 평가", 한국해양공학회지, 22(1), pp.53~57 (2008), 한국해양공학회
- Kim, I.S., "Characterization of Deformation Behavior for Waspaloy under Creep-Fatigue Interaction", Int. J. of Metals and Materials, 6(5), pp.407~413 (2000)
- Kim, W.G., "Creep Characterization of Type 316LN and HT-9 Stainless Steels by the K-R Creep Damage Model", KSME Int. J., 15(11), pp.1463~1471 (2001)
- Kong, Y.S., "Creep Life Prediction of High Temperature Tube Materials for Power Plants", Key Engineering Materials, 261-263, pp.1115~1122 (2004)
- Larson, F.R., "A Time Temperature Relationship for Rupture and Creep Stresses", Trans ASME, 174, pp.765~781 (1952)
- Norton, F.H., "The Creep of Steel at High Temperatures", pp.67~ (1910), McGraw Bill
- Tsuchida, Y., "Creep Rupture Strength of V-modified 2 1", 4Cr-1Mo Steel, 2004, pp.81, 191~197