合金元素Mo对材料超高周疲劳性能的影响  

Effect of Alloy Element Mo on the Material Fatigue Life in Very High Cycle Range

作　　者：张真源[1] 常颖[1] 

机构地区：[1]四川建筑职业技术学院,四川德阳618000

出　　处：《中国材料科技与设备》2009年第5期61-63,共3页Chinese Materials Science Technology & Equipment

摘　　要：采用超声疲劳试验技术对42CrMo钢超高周疲劳性能进行了研究。将42CrMo钢超高周疲劳S-N曲线与已有文献中40Cr钢在相同试验方法和试验条件下得到的超高周疲劳S-N曲线进行比较，结果显示42CrMo钢超高周疲劳性能优于40Cr钢。通过分析推测，合金元素Mo增加了疲劳裂纹内部萌生的时间，进而提高了材料超高周疲劳的寿命。Fatigue behavior of 42CrMo steel was studied with the ultrasonic fatigue testing. The result displayed that ultrasonic fatigue behavior of 42CrMo steel was better than 40Cr steel after their S-N curves compared in the same test conditions and test environment. Analyses and comparison proved it true that the alloy element Mo lengthened the inner initiated duration of the fatigue cracks and the life-span of material fatigue life in very high cycle range.

关 键 词：超高周疲劳 S-N曲线 42CRMO钢 

分 类 号：TF125.12[冶金工程—粉末冶金]