...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Thermal engineering >The Influence of Short-Term Strength on the Notch Sensitivity and Crack Growth Resistance of the Metal of Rotors under Creep Conditions
【24h】

The Influence of Short-Term Strength on the Notch Sensitivity and Crack Growth Resistance of the Metal of Rotors under Creep Conditions

机译：蠕变条件下短期强度对转子金属缺口敏感性和裂纹扩展阻力的影响

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

Comparative assessment of the effect the yield strength has on the characteristics of EI-415 steel under creep conditions is carried out based on the results from long-term (for more than 70000 h) tests of notched samples at an elevated temperature. The metal of three rotors (EI-415 steel) (one after it had been in operation for 137000 h and the other two in the delivery state with relatively increased and decreased levels of yield strength) was used as material under study. The notch sensitivity was evaluated from the ratio between the long-term strength of smooth samples and that of notched samples tested for long-term strength with recording the crack opening width. The resistances to crack incipience and to crack growth with a preset rate were determined from the lengths of cracks appeared at the end of two auxiliary notches of a smaller depth, and the creep fracture toughness was calculated from the break conditions. It is shown that the metal the properties of which are at the lower boundary of yield strength requirements is slightly more advantageous in the level of the above-mentioned characteristics.
机译：基于在高温下对缺口试样进行的长期（超过70000 h）测试的结果，对屈服强度对EI-415钢特性的影响进行了比较评估。将三个转子的金属（EI-415钢）（一个已经运行了137000 h，另一个两个处于交付状态，屈服强度相对增加和降低了）用作研究的材料。根据记录裂纹开口宽度的光滑样品的长期强度与测试长期强度的缺口样品的长期强度之比来评估缺口敏感性。根据出现在两个较小深度的两个辅助槽口末端的裂纹长度来确定对裂纹萌生和裂纹扩展的抵抗能力，并根据断裂条件计算出蠕变断裂韧性。结果表明，在上述特性水平上，性能处于屈服强度要求下限的金属稍微更有利。

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