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| 摘要: |
| 采用激光熔覆方法在铝合金表面得到了铜合金熔覆层，试验观察到在熔覆层与基体表面界区域易于产生宏观裂纹，在熔覆层顶层易于产生微观裂纹。利用MSC／NASTRAN有限元分析软件对熔覆层横断面内平面残余热应力进行了模拟分析，得出了其残余热应力分布，解释了涂层中的裂纹现象。 |
| 关键词: 激光熔覆 裂纹 有限元分析 铝合金 残余应力 |
| DOI： |
| 分类号:TG166.3 TB115 |
| 基金项目: |
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| Cracks in the Laser Cladded Copper Alloy Coatings on Aluminum Alloy and Its Finite Element Analysis |
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DONG Shiyun XU Binshi LIANG Xiubing HAN Jiecai DU Shanyi
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| Abstract: |
| Cracks in the laser cladded copper alloy coatings on aluminum alloy were observed on the cross section. It was often found that the macro-cracks on the interface of coating and substrate were easily produced, while the micro-cracks appeared on the top layer of coating. The thermal residual plane stress on cross section of coating was analyzed by MSC/NASTRAN Finite Element software, and a distribution map of thermal residual plane stress was obtained, which can explain the cracking phenomena in the laser cladded coating. |
| Key words: laser cladded coating,cracks,finite element analysis |
