...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Science and Technology of Welding and Joining >Metallographic and fracture characteristics of resistance spot welded TWIP steels
【24h】

Metallographic and fracture characteristics of resistance spot welded TWIP steels

机译：电阻点焊TWIP钢的金相和断裂特性

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

In this study, the microstructural characterisation, mechanical testing and fractography investigation were performed on twinning induced plasticity (TWIP) steels, fabricated with resistance spot welding. Failure mode during the cross-tensile test was found to follow the sequences of strain localisation of both sheets, crack initiation at notch tip, crack following along the fusion boundary and, finally, ductile shear fracture along the sheet thickness direction. On the other hand, failure in the tensile shear test was always directed along the sheet/sheet (s/s) interface; the interfacial failure and shear deformation were observed at the weld centreline. Solidification occurred as a primary austenitic solidification mode, and no martensitic transformations were detected through electron backscatter diffraction analysis. The fusion zone was mainly composed of austenite with directional solidification towards the centreline; the columnar dendritic and equiaxed structures were identified. Interdendritic C and Mn cosegrega-tion were confirmed by electron probe microanalysis.
机译：在这项研究中，对用电阻点焊制造的孪生感应塑性（TWIP）钢进行了显微组织表征，力学性能测试和断口扫描研究。发现在横向拉伸试验中的破坏模式遵循两个板的应变局部化，在切口尖端处的裂纹萌生，沿着熔合边界的裂纹继而沿着板厚度方向的韧性剪切断裂的顺序。另一方面，拉伸剪切试验中的失败总是沿着片/片（s / s）界面定向的;这是因为在片材/片材（s / s）的界面上是直接的。在焊缝中心线观察到界面破坏和剪切变形。凝固作为主要的奥氏体凝固模式发生，并且通过电子背散射衍射分析未检测到马氏体转变。熔合区主要由奥氏体组成，定向凝固指向中心线。鉴定出柱状树突和等轴结构。通过电子探针显微分析证实了枝晶间的C和Mn共聚。

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