| 镍基高温合金蠕变裂纹扩展的微观力学分析 |
| |
| 引用本文： | 申辉旺,高振涛,刘长富,蔡其巩.镍基高温合金蠕变裂纹扩展的微观力学分析[J].航空学报,1982,3(2):105-111. |
| |
| 作者姓名： | 申辉旺 高振涛 刘长富 蔡其巩 |
| |
| 作者单位： | 北京钢铁研究院
(申辉旺，高振涛，刘长富)，北京钢铁研究院(蔡其巩) |
| |
| 摘 要： | 光滑和预制裂纹的高温合金试件的应力持久寿命的实验结果说明,预先存在的小裂纹,严重地降低高温合金构件的应力持久强度和寿命。 扫描电镜和金相照片分析说明,裂纹沿晶界孔洞扩展。根据孔洞增长和与主裂纹顶端会合的微观力学分析,用蠕变J积分参量和裂纹张开位移速率推导出蠕变裂纹扩展公式。GH_(33A)高温合金的实验数据论证了上面的断裂力学分析。
|
| 关 键 词： | |
| 收稿时间： | 1981-01-01; |
MICROMECHANICAL ANALYSIS OF CREEP CRACK GROWTH ON A NICKEL-BASE SUPERALLOY |
| |
| Shen Huiwang,Gao Zhentao,Liu Changfu,Cai Qigung.MICROMECHANICAL ANALYSIS OF CREEP CRACK GROWTH ON A NICKEL-BASE SUPERALLOY[J].Acta Aeronautica et Astronautica Sinica,1982,3(2):105-111. |
| |
| Authors: | Shen Huiwang Gao Zhentao Liu Changfu Cai Qigung |
| |
| Institution: | Central Iron and Steel Research Institute |
| |
| Abstract: | Experiment on stress rupture life of smooth and precracked superalloy specimens shows that small preexisting crack seriously reduces the stress rupture strength and life of superalloy components.SEM and metallographic analysis indicate that the crack grows along grain boundaries by cavitation. Based on micromechanical analysis of the cavity growth and coalescence with the main crack tip, creep crack growth formulas were derived by using creep J integral parameter J and COD rate parameter δ. Experimental data on GH33A superalloy have verified the above fracture mechanical analysis. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《航空学报》浏览原始摘要信息 |
| 点击此处可从《航空学报》下载免费的PDF全文 |
