| 激光冲击处理后Ni基高温合金的性能 |
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| 引用本文： | 孔德军,张永康,鲁金忠,邹世坤.激光冲击处理后Ni基高温合金的性能[J].材料研究学报,2006,20(5):492-495. |
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| 作者姓名： | 孔德军 张永康 鲁金忠 邹世坤 |
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| 作者单位： | 江苏大学机械工程学院,镇江,212013;北京航空制造工程研究所,北京,100024 |
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| 基金项目： | 国家高技术研究发展计划(863计划);江苏省研究生培养创新工程项目 |
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| 摘 要： | 对Ni基高温合金进行了激光冲击强化处理，测量了处理后Ni基高温合金的残余应力、表面粗糙度分布规律和疲劳强度．结果表明，激光冲击处理后凹坑内残余压应力值为200—400MPa，其分布服从泊松正态分布规律；承载能力比未冲击试样提高大约150MPa；激光冲击区的粗糙度降低一个等级，凹坑内粗糙度数值分布也服从正态分布规律．激光冲击处理后表面出现了组织细化的硬化层，强化效果明显，残余压应力有极大的提高，有效地提高了抗疲劳寿命．
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| 关 键 词： | 金属材料 Ni基高温合金 激光冲击处理 粗糙度 疲劳强度 |
| 文章编号： | 1005-3093(2006)05-0492-04 |
| 收稿时间： | 09 12 2005 12:00AM |
| 修稿时间： | 04 30 2006 12:00AM |
Mechanical properties of Ni-based superalloy by laser shock processing |
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| KONG Dejun,ZHANG Yongkang,LU Jinzhong,ZOU Shikun.Mechanical properties of Ni-based superalloy by laser shock processing[J].Chinese Journal of Materials Research,2006,20(5):492-495. |
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| Authors: | KONG Dejun ZHANG Yongkang LU Jinzhong ZOU Shikun |
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| Affiliation: | 1.School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013 2.Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024 |
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| Abstract: | The surface of Ni-based superalloy was processed by LSP (laser shock processing), the residual stress, surface roughness and fatigue strength were measured. The results show that the com-pressive residual stress in the concave by LSP is about -200- -400 MPa, which obey Poisson distribution. Carrying capacities of Ni-based superalloy by LSP increase about 150 MPa than that of primitive status. The roughness in area by LSP decreases in by one rate, which obey normal distribution too. The hardened layer of refined microstructure by LSP is obtained in the surface, and the hardened effects of Ni-based superalloy by LSP are very obvious, and residual stresses increase greatly, which effectively improves its anti-fatigue service life. |
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| Keywords: | metallic materials Ni-based superalloy laser shock processing (LSP) roughness fatigue strength |
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