| 激光熔覆Ni-2涂层在冲击载荷下失效机理研究 |
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| 引用本文： | 彭如恕,石世宏,欧阳敏玲.激光熔覆Ni-2涂层在冲击载荷下失效机理研究[J].激光技术,2004,28(3):259-261. |
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| 作者姓名： | 彭如恕 石世宏 欧阳敏玲 |
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| 作者单位： | 1.南华大学, 机械工程学院, 衡阳, 421001; |
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| 摘 要： | 采用冲击碰撞载荷,对奥氏体不锈钢表面激光熔覆镍基合金涂层进行冲击试验,涂层与基体都产生了微塑性变形,反复作用可产生累积宏观塑性变形,从涂层到基体都出现了均匀的形变硬化现象。在涂层覆盖区边缘下部会出现强烈的形变硬化与材料流动现象,同时此处容易产生裂纹并扩展。
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| 关 键 词： | 激光熔覆涂层 脉动冲击 表面力学性能 显微组织 |
| 文章编号： | 1001-3806(2004)03-0259-03 |
| 收稿时间： | 2003/6/18 |
| 修稿时间： | 2003年6月18日 |
Failure mechanism of laser clad Ni-2 coating under fluctuating impact load |
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| PENG Ru-shu ,SHI Shi-hong ,OUYANG Min-ling.Failure mechanism of laser clad Ni-2 coating under fluctuating impact load[J].Laser Technology,2004,28(3):259-261. |
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| Authors: | PENG Ru-shu SHI Shi-hong OUYANG Min-ling |
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| Affiliation: | PENG Ru-shu 1,SHI Shi-hong 2,OUYANG Min-ling 1 |
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| Abstract: | Austenitic stainless steel treated with laser clad Ni-based alloy is tested under impact load.There is micro plastic deformation in the base and clad coating.Macro plastic deformation is formed after repeated process,and homogeneous hardening comes into being from clad to base.There is intensive deformation hardening and material-flowing phenomena along the brink of clad coating, on which cracks tend to grow and spread. |
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| Keywords: | laser cladding fluctuating shock surface mechanical properties microstructure |
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