• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials at High Temperatures >Creep fatigue crack growth and fracture mechanisms of T/P91 power plant steel
【24h】

Creep fatigue crack growth and fracture mechanisms of T/P91 power plant steel

机译：T / P91电厂钢蠕变疲劳裂纹扩展与断裂机理

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

High temperature assessment of crack like defects in power plant components is one of the most important task to ensure high energy conversion efficiency. Creep fatigue crack growth tests for P91 power plant steel, conducted at 600 degrees C on standard C(T) specimens with 0.1, 1 and 10 h hold times, are presented. Microscopic features of the creep fatigue damage were observed along the crack path, on polished and etched cross sections of the tested specimens. The dominant damage mechanism is the formation of microvoids and microcracks associated with the crack tip, due to the creep effect during the hold time. In order to predict the experimentally measured crack growth rate a simple summation rule is used. The superposition of fatigue crack growth rate and creep crack growth rate, experimentally obtained on the same batch of material used for creep fatigue crack growth tests, well describes the behaviour under creep fatigue loading.
机译：高温评估电厂部件中的裂纹缺陷是确保高能量转换效率的最重要任务之一。提出了P91电厂钢的蠕变疲劳裂纹扩展测试，该测试在600摄氏度下对标准C（T）试样进行了0.1、1和10 h的保持时间。在测试样品的抛光和蚀刻截面上，沿着裂纹路径观察到蠕变疲劳损伤的微观特征。主要的破坏机理是由于保持时间内的蠕变效应，与裂纹尖端相关的微孔和微裂纹的形成。为了预测实验测量的裂纹扩展速率，使用了简单的求和规则。通过在用于蠕变疲劳裂纹扩展测试的同一批材料上实验获得的疲劳裂纹扩展速率和蠕变裂纹扩展速率的叠加，很好地描述了蠕变疲劳载荷下的行为。

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