Effect of Residual Stress on Thermal Deformation Behavior
Effect of Residual Stress on Thermal Deformation Behavior
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DOI：
10.3390/ma12244141
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发表时间：
2019-12-02
期刊：
影响因子：
3.4
通讯作者：
McGibboney, Conor
中科院分区：
文献类型：
--
作者：
Sasaki, Tomohiro;Yoshida, Sanichiro;McGibboney, Conor
本文讨论了一种基于光学可视化的残余应力无损测量技术。通过将试件加热到室温+10摄氏度以进行初始校准，将可能的最小变形量应用于钢板，并使用对二维面内位移敏感的电子散斑图案干涉仪来可视化热膨胀行为。通过干涉条纹分析，得到了位移随热变形和热膨胀系数的分布。结果表明，热变形行为的变化受初始施加在钢试件上的外部应力的影响。此外，还采用对接钎焊的方法制备了钢和硬质合金板材的异种接头。根据热膨胀系数的应力相关性估算了残余应力。
This paper discusses a non-destructive measurement technique of residual stress through optical visualization. The least amount of deformation possible is applied to steel plates by heating the specimens +10 degrees C from room temperature for initial calibration, and the thermal expansion behavior is visualized with an electronic speckle pattern interferometer sensitive to two dimensional in-plane displacement. Displacement distribution with the thermal deformation and coefficient of thermal expansion are obtained through interferometric fringe analysis. The results suggest the change in the thermal deformation behavior is affected by the external stress initially applied to the steel specimen. Additionally, dissimilar joints of steel and cemented carbide plates are prepared by butt-brazing. The residual stress is estimated based on the stress dependence of thermal expansion coefficient.