| 循环压缩载荷下Ni3Al基合金单晶体的疲劳开裂 |
| |
| 引用本文： | 张广平,王中光,李广义.循环压缩载荷下Ni3Al基合金单晶体的疲劳开裂[J].金属学报,1996,32(11):1149-1153. |
| |
| 作者姓名： | 张广平 王中光 李广义 |
| |
| 作者单位： | 中国科学院金属研究所材料疲劳与断裂国家重点实验室，中国科学院金属研究所 |
| |
| 摘 要： | 采用两种晶体取向的单边缺口试样，在循环压缩载荷下对Ｎｉ３Ａｌ基合金单晶体的疲劳裂纹萌生和扩展行为进行了研究。在循环压缩载荷下，第一阶段的晶体学开裂在缺口根部同时沿着两个或更多的（１１１）面发生。
|
| 关 键 词： | 循环压缩 疲劳开裂 晶体取向 镍铝合金 |
| 收稿时间： | 1996-11-18 |
| 修稿时间： | 1996-11-18 |
FATIGUE CRACKING IN Ni3Al SINGLE CRYSTAL UNDER CYCLIC COMPRESSIVE LOAD |
| |
| ZHANG Guangping,WANG Zhongguang,LI Guangyi.FATIGUE CRACKING IN Ni3Al SINGLE CRYSTAL UNDER CYCLIC COMPRESSIVE LOAD[J].Acta Metallurgica Sinica,1996,32(11):1149-1153. |
| |
| Authors: | ZHANG Guangping WANG Zhongguang LI Guangyi |
| |
| Affiliation: | ZHANG Guangping,WANG Zhongguang,LI Guangyi (State Key laboratory for Fracture and Fatigue of Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang ) |
| |
| Abstract: | Fatigue cracking in Ni3Al single crystals with two kinds of orientation was examined by means of single-edge notch specimens under cyclic compression. Stage I cracking along two or more {111} planes can occur from the notch root simultaneously. There exists an orientation dependence of the crack initiation threshold under cyclic compression. The cleavage chunk falling off from the specimen surface due to the intersection of different {111} planes was observed in (100)010] specimen, but never observed in (110)110] specimen. Subsequently, the mechanism of crack growth which is dependent on orientation was proposed in this paper. |
| |
| Keywords: | cyclic compression fatigue cracking crystallographic orientation alloy Ni3Al |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《金属学报》浏览原始摘要信息 |
|
点击此处可从《金属学报》下载全文 |
