激光离散预处理基体镀铬身管延寿的力学机理研究
The Mechanical Mechanism Study on Prolonging Life of Chromium-plated Gun Bore Through Laser Discrete Pretreatment
查看参考文献14篇
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文摘
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通过对激光螺旋线状离散预处理基体镀铬身管的靶场实验样品解剖分析和该类涂层／基体结构界面裂纹扩展特点的理论研究，得出激光离散预处理基体镀铬身管延寿的主要力学机理是通过3个方面延缓了铬层的剥落：将均匀基体上随机性的表面主裂纹形貌改变成与激光离散处理、阴阳线结构相对应的菱形主裂纹形貌；增加了由主裂纹围成的铬层“孤岛”尺寸；增加了主裂纹间的界面裂纹扩展距离和减小了界面裂纹驱动力。 |
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其他语种文摘
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The range experimental sample of gun bore was analyzed, whose substrate was periodically and straggly pre-treated by laser and the interface crack growth in the coating/substrate structure was theoretically studied. The results show that the mechanical mechanism of prolonging life of chromiumplated gun bore can be described as the following three points： （a） The surface net of main crack appearing randomly on the homogeneous substrate is changed into the strip pattern of main crack, which corresponds with the laser pretreatment, so that the dimension of Cr-plated ＂island＂ is increased; （b） The increase of interval between the main cracks prolongs the extending distance of interfacial crack; （c） When the interfacial crack propagates from original zone to laser processed zone, the latter can reduce crack driving force. |
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来源
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兵工学报
,2006,27(6):978-983 【核心库】
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关键词
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材料表面与界面
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镀铬
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身管
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激光
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离散预处理
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基体
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表面主裂纹
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界面裂纹
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地址
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1.
中国科学院力学研究所, 北京, 100080
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中国科学院研究生院, 北京, 100080
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-1093 |
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学科
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金属学与金属工艺;电子技术、通信技术 |
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基金
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国家自然科学基金资助项目
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文献收藏号
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CSCD:2634045
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