| Crack initiation and propagation induced by inclusions in a nickel-base P/M superalloy under fatigue load |
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| 作者姓名： | ZENG Yanping ZHANG Maicang DONG Jianxin ZHANG Lina XIE Xishan |
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| 作者单位： | [1]High Temperature Materials Research Laboratory, University of Science and Technology Beijing, Beijing 100083, China [2]School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China |
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| 摘 要： | 1 IntroductionRecently the key components in advanced aircraftengines are widely made of nickel-base P/M super-alloy. However, non-metallic inclusions are intro-duced into this material during powder metallurgyprocessing. In industry, although many method…
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| 关 键 词： | 超耐热合金 疲劳度分析 镍 P/M 金属材料 |
| 收稿时间： | 2004-07-04 |
Crack initiation and propagation induced by inclusions in a nickel-base P/M superalloy under fatigue load |
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| ZENG Yanping ZHANG Maicang DONG Jianxin ZHANG Lina XIE Xishan.Crack initiation and propagation induced by inclusions in a nickel-base P/M superalloy under fatigue load[J].Rare Metals,2005,24(3):298-300. |
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| Authors: | ZENG Yanping ZHANG Maicang DONG Jianxin ZHANG Lina XIE Xishan |
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| Abstract: | In situ fatigue tests in special designed SEM were conducted to trace the whole process of crack initiation and propagation till to fracture in nickel-base P/M superalloy seeded inclusions. The experimental results show that non-metallic inclusions can induce crack initiation. When the inclusion size is larger than the critical one, the crack can propagate as the main crack that induces the specimen to fracture. As a result, the LCF life of the specimen decreases. |
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| Keywords: | nickel-base P/M superalloy inclusion crack initiation and propagation fracture |
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