Microstructural evolution and restoration of creep property for a damaged K403 alloy after rejuvenation heat treatments

作     者：Liang Wang Xiao-Guang Yang Hong-Yu Qi Duo-Qi Shi Shao-Lin Li Liang Wang;Xiao-Guang Yang;Hong-Yu Qi;Duo-Qi Shi;Shao-Lin Li

作者机构：School of Energy and Power EngineeringBeihang UniversityBeijing 100191China Beijing Key Laboratory of Aero-Engine Structure and StrengthBeijing 100191China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2021年第40卷第7期

页      面：1865-1871页

核心收录：

学科分类：080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the National Science and Technology Major Project(No.2017-IV-00120049) 

主　　题：Microstructural evolution Creep property Restoration Rejuvenation heat treatments 

摘      要：Rejuvenation heat treatments can restore the microstructures and mechanical properties of the degraded turbine blades in gas turbine *** we analyze the effects of rejuvenation heat treatments on the microstructural characteristics and mechanical properties of damaged and undamaged specimens of a Ni-based superalloy,*** damaged specimens were found to have degraded microstructures and shorter creep lifetime than the undamaged *** rejuvenation heat treatment proved beneficial,especially for specimens exposed to damage for 50 *** addition,the microstructure recovery and creep life were found to depend on the predamage durations of the specimens.A y’-precipitate-based creep lifetime model was established to predict the residual lifetime based on the microstructural information.