• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on High Performance Structures and Materials; 2006; Ostends(BE) >Compressive residual stress generation process by laser peening without pre-coating
【24h】

Compressive residual stress generation process by laser peening without pre-coating

机译：无需预涂即可通过激光喷丸产生压缩残余应力的过程

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Laser peening without pre-coating has been applied to water-immersed specimens of high tensile strength steel. In order to understand the generation process of compressive residual stress, specimens with various laser irradiation patterns, i.e., single spot, line scanning and area scanning, were prepared. Detailed distributions of residual stress on the specimens were measured using synchrotron radiation. Large tensile residual stresses, which might be caused by the thermal effect of the laser pulse, were observed in the center region on the single spot. It decreased towards the edge of the spot, and changed to compression around the spot. The compression became larger with the increasing pulse numbers irradiated on the same spot. In the line scanning, a tensile residual stress was observed in the final spot of the line, which decreased and changed to compression as the distance from the final spot increased. The residual stress on the area scanning was compression as a whole. It was estimated that the compressive residual stress in the area scanning would be generated from the overlapping effect of the compressive field made around each laser spot. The residual stress generated by laser peening without pre-coating is considered to be the superimposition of the tensile and the compressive components due to thermal effect and plastic deformation, respectively.
机译：没有预涂的激光喷丸技术已经应用于高抗拉强度钢的水浸试样。为了理解残余压应力的产生过程，准备了具有各种激光照射模式的样品，即单点，线扫描和面扫描。使用同步加速器辐射测量样品上残余应力的详细分布。在单个点的中心区域观察到大的拉伸残余应力，这可能是由激光脉冲的热效应引起的。它朝着斑点的边缘减小，并变为围绕斑点的压缩。随着在相同位置上照射的脉冲数增加，压缩变得更大。在线扫描中，在线的最终点中观察到拉伸残余应力，该残余应力减小，并随着距最终点的距离增加而变为压缩。区域扫描的残余应力总体上是压缩的。据估计，区域扫描中的压缩残余应力将由围绕每个激光光斑形成的压缩场的重叠效应产生。激光喷丸未预涂而产生的残余应力被认为分别是由于热效应和塑性变形而引起的拉伸和压缩分量的叠加。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号