东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2003, Vol. 24 ›› Issue (4): 349-351.DOI: -

• 论著 • 上一篇    下一篇

高温断裂韧性的温度和应变速率效应

张淑佳;任朝晖;梅国晖;卢炎麟   

  1. 东北大学机械工程与自动化学院;东北大学机械工程与自动化学院;东北大学机械工程与自动化学院;浙江工业大学机电学院 辽宁沈阳110004
  • 收稿日期:2013-06-23 修回日期:2013-06-23 出版日期:2003-04-15 发布日期:2013-06-23
  • 通讯作者: Zhang, S.-J.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目 (19472 0 5 7)

Effect of temperature and strain rate upon fracture toughness at high temperature

Zhang, Shu-Jia (1); Ren, Zhao-Hui (1); Mei, Guo-Hui (1); Lu, Yan-Lin (2)   

  1. (1) Sch. of Mech. Eng. and Automat., Northeastern Univ., Shenyang 110004, China; (2) Coll. of Mech. and Elec. Eng., Zhejiang Univ. of Technol., Hangzhou 310032, China
  • Received:2013-06-23 Revised:2013-06-23 Online:2003-04-15 Published:2013-06-23
  • Contact: Zhang, S.-J.
  • About author:-
  • Supported by:
    -

RichHTML

1

PDF (PC)

1337

摘要： 对 2 0 g钢高温断裂韧性的温度和应变速率效应进行了试验研究·在 40 0℃和 5 0 0℃温度下 ,分别测量了几种应变速率下 2 0 g钢的Ji 值·试验结果表明 ,Ji 值随应变速率的增大而有较大幅度的降低 ;在同一应变速率下 ,温度 40 0℃时的Ji 值小于 5 0 0℃时的Ji 值·为了对压力容器在高温短期负载环境下的安全性作出正确的评价 ,有必要通过高温断裂韧性试验 ,测出相应的高温断裂韧性值

关键词: 高温断裂韧性, 应变速率, 加载点位移速率, 断裂韧性Ji值

Abstract: The influence of the temperature and strain rate on fracture toughness was studied for pressure vessel steel 20 g. The fracture toughness Ji was measured at 400°C and 500°C under four constant strains rates cases. The fracture toughness Ji decreases greatly as the strain rate increases and the fracture toughness Ji value of the same strain rate at 400°C is less than that at 500°C on loading condition. The appropriate evaluation to the pressure vessel safety at high temperature condition should consider the rule of the fracture toughness varied with temperature and strain rate, and measure the related Ji, value by high temperature fracture toughness experiment.

中图分类号: