测量了35冷轧钢经不同的拉应力作用后,在40 kA·m-1外磁场作用下,端点表面剩余磁感应强度和矫顽力随拉应力的变化关系.结果表明:当外作用拉应力小于材料的屈服强度时,不同拉应力产生的残余应力对端点表面剩余磁感应强度和矫顽力的影响很小;当拉应力接近屈服强度或大于屈服强度时,端点表面剩余磁感应强度和矫顽力将急剧增加发生跃变.可以利用端点表面剩余磁感应强度和矫顽力在屈服点附近发生突变的性质对材料的受力状态和疲劳损伤状况进行探测,能够对负载是否已超出材料屈服强度进行有效判断.
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