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| 表面再结晶对定向凝固高温合金高周疲劳行为的影响 | |
| 引用本文： | 何彪,李运菊,张卫方,鲁玉祥.表面再结晶对定向凝固高温合金高周疲劳行为的影响[J].航空材料学报,2007,27(2):22-24. |
| 作者姓名： | 何彪 李运菊 张卫方 鲁玉祥 |
| 作者单位： | 1. 中国石油大学(华东)材料系,山东,东营,257061;北京航空材料研究院,北京,100095 2. 北京航空材料研究院,北京,100095 3. 中国石油大学(华东)材料系,山东,东营,257061 |
| 摘 要： | 采用悬臂旋转弯曲试验,研究定向凝固DZ4合金在喷丸预变形及热处理后产生的再结晶层对高周疲劳寿命的影响.结果表明,DZ4合金经过一定程度的预变形,在随后的高温热处理后表面会产生一定厚度的再结晶;再结晶层对DZ4合金高周疲劳寿命有一定影响;在一定喷丸强度范围内,随喷丸强度增加,疲劳寿命先减小后增大. |
| 关 键 词： | 定向凝固合金 再结晶 高周疲劳 |
| 文章编号： | 1005-5053(2007)02-0022-03 |
| 修稿时间： | 2006年3月20日 |
Influence of Recrystallized Layer on High Cycle Fatigue Life of Directionally Solidified Superalloy |
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| HE Biao,LI Yun-ju,ZHANG Wei-fang,LU Yu-xiang.Influence of Recrystallized Layer on High Cycle Fatigue Life of Directionally Solidified Superalloy[J].Journal of Aeronautical Materials,2007,27(2):22-24. | |
| Authors: | HE Biao LI Yun-ju ZHANG Wei-fang LU Yu-xiang |
| Abstract: | Using cantilever-rotation-bending method,the influence of recrystallized layer formed by shot peening and heat treatment on high cycle fatigue life of directionally solidified DZ4 superalloy was studied.The results showed that recrystallized layer would formed in the DZ4 superalloy after predeformationg and high-temperature heat treatment,and recrystallized layer would weaken the high cycle fatigue life of DZ4 to a certain extent.In a certain extent of the pressure of shot peening,along with the increase of the pressure of shot peening,the fatigue life was first reduced and after increased. |
| Keywords: | directionally solidified superalloy recrystallization high cycle fatigue |
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