This content is not included in your SAE MOBILUS subscription, or you are not logged in.
A New Creep-Fatigue Damage Rule and Its Application to 316lc Steel Under Variable Strainings At Elevated Temperature
Published April 15, 1996 by Institution of Mechanical Engineers in United Kingdom
Event: Sixth International Conference on Creep and Fatigue Design and Life Assessment at High Temperature
The creep-fatigue life prediction model under variable strainings, which was previously proposed for Mod.9Cr-1Mo steel, was applied to 316LC steel. Creep-fatigue tests, crack growth tests, and high-low (HL) and low-high (LH) tests were conducted under PP (fast-fast) and CP (slow-fast) type strainings at 700°C and 800°C, and based on the experimental results the material parameters needed in the proposed model were determined. It was suggested that the crack initiation life cannot be negligible not only in PP type low strain ranges but also in CP type low strain ranges whereas it is negligible in CP type low strain ranges for Mod.9Cr-1Mo steel, and some modification of the model is needed to describe the initial rack growth behavior of 316LC steel. The remaining life in HL and LH tests was well predicted by the modified proposed method.