Thermomechanical fatigue,oxidation, and Creep: Part II. Life prediction |
| |
Authors: | R W Neu Huseyin Sehitoglu |
| |
Affiliation: | (1) Department of Mechanical and Industrial Engineering, University of Illinois, 61801 Urbana, IL |
| |
Abstract: | A life prediction model is developed for crack nucleation and early crack growth based on fatigue, environment (oxidation),
and creep damage. The model handles different strain-temperature phasings(i.e., in-phase and out-of-phase thermomechanical fatigue, isothermal fatigue, and others, including nonproportional phasings).
Fatigue life predictions compare favorably with experiments in 1070 steel for a wide range of test conditions and strain-temperature
phasings. An oxide growth (oxide damage) model is based on the repeated microrupture process of oxide observed from microscopic
measurements. A creep damage expression, which is stress-based, is coupled with a unified constitutive equation. A set of
interrupted tests was performed to provide valuable damage progression information. Tests were performed in air and in helium
atmospheres to isolate creep damage from oxidation damage. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|