• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Stress corrosion cracking fracture mechanism of cold-drawn high-carbon cable bolts
【24h】

Stress corrosion cracking fracture mechanism of cold-drawn high-carbon cable bolts

机译：冷拔高碳电缆螺栓的应力腐蚀开裂断裂机理

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

Premature failures of cable bolts due to stress corrosion cracking (SCC) in underground reinforcement systems are universal issues with limited practical countermeasures at present. To determine the SCC fracture mechanism which is an essential step to develop the potential solutions, the environment conditions leading to SCC failures were examined using four-point bend tests. Fractographic features of both serviced-failed and laboratory-failed cable bolts were investigated and compared. It was identified that the fracture surfaces of cable wires were characterised by step-shape fracture mode. The highly-oriented wavy lamellae microstructures of cable wires, produced during cold-drawn manufacturing process, have significant effects on the direction and path of crack propagation. Hydrogen-assisted SCC was suggested as the dominant fracture mechanism in cable bolt failures. SCC only occurred in the environmental conditions that promoted the diffusion of hydrogen diffusion into the cable wires, and crack growth rates were determined by the hydrogen diffusion rates. This study provided fundamental knowledge on fracture mechanism of cable bolts which can be applied to further study in identifying potential countermeasures against the SCC of cold-drawn high-carbon cable bolts.
机译：地下钢筋系统中由于应力腐蚀开裂（SCC）引起的电缆螺栓过早失效是普遍存在的问题，目前的实际对策有限。为了确定SCC断裂机制，这是开发潜在解决方案的必不可少的步骤，使用四点弯曲试验检查了导致SCC失效的环境条件。研究并比较了维修失效和实验室失效的电缆螺栓的分形特征。可以确定，电缆线的断裂表面具有阶梯状断裂模式。在冷拔制造过程中产生的电缆线的高度取向的波浪状薄片微结构，对裂纹扩展的方向和路径具有重大影响。氢辅助SCC被认为是电缆螺栓失效的主要断裂机制。 SCC仅在促进氢扩散到电缆中的扩散的环境条件下发生，并且裂纹扩展速率由氢扩散速率决定。这项研究提供了有关电缆螺栓断裂机理的基础知识，可用于进一步研究以确定潜在的对策，以应对冷拔高碳电缆螺栓的SCC。

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