偏离<001>取向15°的三种镍基单晶高温合金试样的中温蠕变变形行为  

Creep Deformation of Three Samples Misaligned 15° from <001> Crystallographic Axis for a Nickel-based Single Crystal Superalloy DD413

作　　者：李钢 张思倩[2] 张宗鹏 王迪[3] 王栋[3] 董加胜[3] LI Gang;ZHANG Siqian;ZHANG Zongpeng;WANG Di;WANG Dong;DONG Jiasheng(AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,China;School of Material Science and Engineering,Shenyang University of Technology,Shenyang 110870,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]中国航发湖南动力机械研究所,株洲412002 [2]沈阳工业大学材料科学与工程学院,沈阳110870 [3]中国科学院金属研究所,沈阳110016

出　　处：《材料研究学报》2019年第12期892-896,共5页Chinese Journal of Materials Research

基　　金：国家重点研发计划(2016YFB0701403);国家自然科学基金(51101160,51631008);国家科技重大专项(2017-VI-0003-0073,W0112-025R1);辽宁省自然科学基金指导计划(20180550998)~~

摘　　要：研究了一种偏离<001>取向15°的镍基单晶高温合金的中温蠕变(760℃/793 MPa)性能和变形组织。结果表明:取向靠近<001>-<101>边界合金的蠕变寿命最长,而取向靠近<001>-<111>边界合金的蠕变寿命最短。虽然三种试样取向偏离<001>的夹角都约为15°,但是其微观变形组织明显不同。取向靠近<001>-<101>边界试样的变形主要受控于{111}<110>滑移系,而取向靠近<001>-<111>边界试样变形主要受控于{111}<112>滑移系。The intermediate temperature creep behavior and microstructure of samples misaligned 15°from<001>crystallographic axis for a nickel-based single crystal superalloy were systematically investigated.The results show that the creep life of samples with orientation close to the<001>-<101>symmetry boundary is the longest,while the creep life of samples with orientation close to the<001>-<111>symmetry boundary is the shortest.Although the misorientation angles of the three samples deviated from<001>were all about 15°,their microstructure was obviously different.The deformation of the samples close to the<001>-<101>was mainly controlled by the sliding system of{111}<110>,while the deformation of the samples close to the<001>-<111>was mainly controlled by the sliding system of{111}<112>.

关 键 词：金属材料 单晶高温合金 中温蠕变 取向偏离 滑移系 

分 类 号：TG142[一般工业技术—材料科学与工程]