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| GH132合金疲劳蠕变交互作用下裂纹扩展速率研究 | |
| 引用本文： | 张宏学,姜红根,杨王玥,谢锡善,陈国良,赵玉才,诸建忠. GH132合金疲劳蠕变交互作用下裂纹扩展速率研究[J]. 工程科学学报,1987,9(3): 44-52. DOI: 10.13374/j.issn1001-053x.1987.03.027 |
| 作者姓名： | 张宏学 姜红根 杨王玥 谢锡善 陈国良 赵玉才 诸建忠 |
| 摘 要： | 通过对650℃、不同应力条件下GH132合金的裂纹扩展速率的测定结果表明: （1）由于GH132合金的蠕变与疲劳裂纹的扩展机构不同,使得前者有更大的环境敏感性。 （2）在疲劳蠕变交互作用条件下,裂纹的扩展过程受Kmax及ΔK共同控制(Keq=Kmax+αΔK)。通常的ΔK描述法已不能全面解释裂纹扩展速率与寿命之间的对应关系。 |
| 关 键 词： | 蠕变 疲劳 交互作用 裂纹扩展速率 环境敏感性 应力强度因子 |
| 收稿时间： | 1986-10-20 |
The Investigation of Crack Crowth Rate under the Condition of Fatigue-Creep Interaction for GH132 Disc |
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| Zhang Hongxue,Jiang Honggen,Yang Wangyue,Xie Xishan,Chen Guoliang,Zhao Yucai,Zhu Jianzhong. The Investigation of Crack Crowth Rate under the Condition of Fatigue-Creep Interaction for GH132 Disc[J]. Chinese Journal of Engineering,1987,9(3): 44-52. DOI: 10.13374/j.issn1001-053x.1987.03.027 | |
| Authors: | Zhang Hongxue Jiang Honggen Yang Wangyue Xie Xishan Chen Guoliang Zhao Yucai Zhu Jianzhong |
| Abstract: | The crack growth rates under the condition of fatigue-creep interaction at 650℃ were measured. The results of mesurement indicated that the crack growth rate was controlled by both Kmax and AK. In this case the effective stress indensity factor (Keq) is a suitable parametes describing the behaviour of crack propagation.Keq is equal to the sum of kmax and α'△k,Where α' was assumed as a parameter represented the effect of crack closure,and α' is a function of crack length. |
| Keywords: | creep fatigue fatigue/creep interaction crack growth rate superalloy |
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