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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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一种新型非调质钢弯曲疲劳性能的试样尺寸效应
Keywords: 金属材料,三点弯曲疲劳,尺寸效应,微合金化,非调质钢
Abstract:
？使用液压伺服疲劳试验机考察一种新型(汽车前轴用)nb+v复合微合金非调质钢的疲劳行为,绘制出s--n曲线并分析了疲劳断口特征,研究了其三点弯曲疲劳性能的试样尺寸效应及其原因.结果表明,试样的尺寸对非调质钢的三点弯曲疲劳性能有显著的影响,其三点弯曲疲劳极限随着试样尺寸的减小而增加,但是试样尺寸对疲劳试样的断口形貌几乎没有影响;在三点弯曲疲劳试验中,试样尺寸效应源于试样内部的应力梯度,小尺寸试样的应力梯度比大尺寸试样的高.
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