用超声波法测试20钢低周疲劳过程中弹性常数的变化  

THE CHANGE OF ELASTIC CONSTANT OF STEEL 20 IN LOW-CYCLE FATIGUE PROCEDURE MEASURED BY ULTRASONIC

作　　者：钟斐晖[1] 王寅观[1] 杨海涛[1] 秦仁喜[1] 

机构地区：[1]同济大学声学研究所,上海200092

出　　处：《金属学报》2002年第3期334-336,共3页Acta Metallurgica Sinica

摘　　要：研究了20钢在300MPa静拉应力作用下的低周疲劳过程.对20钢在试验过程中纵波声速和横波声速的变化进行了分析.进而给出了弹性常数及应变随着疲劳周次的变化情况,表明可以用材料弹性常数的变化来反应材料的疲劳状况.The low-cycle fatigue procedure of steel 20 was investigate in 300 MPa static tension stress. The change of the velocities of transversal wave and longitudinal wave was analyzed to determine the change of elastic coefficient and stress with the fatigue cycle. It is proved that the fatigue degree can be determined by the change of elastic coefficient.

关 键 词：低周疲劳 静拉应力 弹性常数 超声波探伤 20钢 

分 类 号：TG142.15[一般工业技术—材料科学与工程] TG115.285[金属学及工艺—金属材料]