Temperature Effect on LCF Behavior and Life Prediction of a Secondary Single Crystal Nickel-based Superalloy
Low cycle fatigue (LCF) tests were conducted on a single crystal nickel-based superalioy with crystallographic orientations 001 at different elevated temperature.The typical temperatures selected are 600 ℃ ,650℃ , 700℃ and 760℃ , which represent the temperature field of turbine blade root or dovetail.The experimental results indicated that the LCF life-total strain range curves were temperature dependent.A modified Cyclic Damage Accumulation (CDA) life prediction model were proposed.In this modified model, an approximate logarithmic linear function was introduced as the additional terms to consider the temperature effect.The prediction of temperature-modified CDA models agree well with the experimental data.Among the three modified modes, the rotation mode gives the best simulation with high accuracy.
single crystal superalloy low cycle fatigue temperature effect life prediction
Zhi Hua ZHANG Hui Chen YU Ying LI Cheng Li DONG
Aviation Key Laboratory of Science and Technology on Materials Testing and Evaluation, Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation, Beijing Institute of Aeronautical Materials, Beijing 100095, China
国际会议
长沙
英文
188-193
2016-10-16（万方平台首次上网日期，不代表论文的发表时间）