Application of ultrasonic waves in measurement of hardness of welded carbon steels

作     者：Fatih UZUN Ali Nezihi BILGE 

作者机构：Department of Chemical Engineering Yeditepe University Department of Energy Systems EngineeringBilgi University 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2015年第11卷第3期

页      面：255-261页

核心收录：

学科分类：080503[工学-材料加工工程] 0806[工学-冶金工程] 0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0802[工学-机械工程] 0703[理学-化学] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 080201[工学-机械制造及其自动化] 

主　　题：超声波速度 硬度测量 焊接工艺 工业应用 碳钢 非破坏性 硬度测试 接触阻抗 

摘      要：The ultrasonic contact impedance technique and ultrasonic wave velocities have been widely used for non-destructive hardness *** wave velocity shift provides through the thickness average hardness, however, the correlations are performed according to surface hardness. In order to accept this technique as a particular non-destructive method for determination of hardness, it is necessary to test it with industrial applications. A widely used joining(welding) technique is selected for this purpose. Samples of carbon steels with three different carbon contents, but similar composition, are annealed in order to obtain the softened samples with different hardness values. Rockwell B scale hardness of heat treated samples, which are assumed to be isotropic, are determined and correlated with ultrasonic wave velocity shifts. Effect of welding process on hardness is investigated using ultrasonic wave velocity shifts, and the results are verified with destructive hardness measurements.