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【摘 要】
：
在U71Mn钢轨截面上不同位置取9个带有燕尾状缺口的试件进行三点弯曲疲劳试验和超声波非线性检测,提取试件在不同疲劳加载循环次数下超声波的基波幅值和二次谐波幅值,据此计算
【机 构】
：
哈尔滨工业大学先进焊接与连接国家重点实验室,
【出 处】
：
中国铁道科学
【发表日期】
：
2015年05期
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