Effect of dendrite arm spacing and the γ' phase size on stress rupture properties of Ni_3Al-base single crystal superalloy IC6SX

作     者：JIANG LiWu1,LI ShuSuo1,WU MeiLing1 & HAN YaFang1,2 1 School of Materials Science and Engineering,Beihang University,Beijing 100191,China 2 Beijing Institute of Aeronautical Materials,Beijing 100095,China 

作者机构：School of Materials Science and Engineering Beihang University Beijing China Beijing Institute of Aeronautical Materials Beijing China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2010年第53卷第6期

页      面：1460-1465页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (Grant No. 50971005) Beihang University Innovation Fund 

主　　题：dendrite arm spacing size of γ’ phase Ni3Al-based single crystal stress rupture property 

摘      要：The effect of dendrite arm spacing and the size of γ phase on stress rupture properties of as-cast Ni3Al-based single crystal superalloy IC6SX was *** has been found that the stress rupture properties were affected by dendrite arm spacing and the size of γ phase significantly,i.e.,the stress rupture lives of as-cast specimens under the test condition of 1100°C/120 MPa were significantly increased from about 10 h to 31 h with decreasing dendrite arm spacing and the size of γ phase from 3.0 μm and 1.6 μm to 1.3 μm and 0.8 μm,*** creep cracks generated easily in the brittle Y-NiMo *** the cracks gradually mergered and grew up during creep,and finally led to specimens *** orientated coarsening of γ phase has been found in the stress ruptured specimens,due to the elements ***,the γ phase did not form the integrated structure during the short periods of 10-31 h as the creep tests lasted.