张继明

• 1:西京学院机械工程学院
• 2:江苏省沙钢钢铁研究院

摘要(Abstract)：

采用超声疲劳试验加载方法,研究了X80针状铁素体管线管的超高周疲劳行为,并利用扫描电镜(SEM)对其疲劳断口进行了观察。结果表明,在10~9循环周次内,X80针状铁素体管线管的超高周疲劳S-N曲线为连续下降型,不存在传统疲劳极限的水平平台。SEM疲劳断口观察表明,在高应力幅短寿命区域,疲劳裂纹主要萌生于试样表面的加工缺陷,而在10~7循环周次以后,疲劳断裂主要起源于试样内部的非金属夹杂物。

关键词(KeyWords)： 针状铁素体;超高周疲劳;S-N曲线;疲劳强度

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 张继明

DOI: 10.13289/j.issn.1009-6264.2019-0516

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