摘要
20Cr钢在不同缺口尖锐度下滚压后疲劳试验结果表明,滚压强化明显提高缺口试样的疲劳极限,其作用高于光滑试样,缺口越尖锐强化效果越显著。在缺口滚压试样疲劳断口上出现裂纹扩展速率快—慢—快的变化。缺口试样滚压后在疲劳极限下运行出现非扩展裂纹。
Fatigue test results have shown that the rolling hardening greatly improved the fatigue limit of 20Cr steel notched speciments after rolling. The effect is more pronourced on notched specimens than those of smooth specimens. When more small notch root radius are obtained, the hardening effect is more abvious. The fatigue crack growth rates have appeared the change of fast-slow-fast on fatigue fractrue of rolling notched specimens, and have discovered non-propagating crack of the notched specimens on fatigue limit test.
出处
《材料工程》
EI
CAS
CSCD
北大核心
1991年第3期31-34,共4页
Journal of Materials Engineering
基金
国家自然科学基金
