Ultrasonic inspection of a welded stainless steel pipe to evaluate residual stresses through thickness
Ultrasonic inspection of a welded stainless steel pipe to evaluate residual stresses through thickness
复制标题
DOI：
10.1016/j.matdes.2013.02.050
复制
发表时间：
2013-08-01
影响因子：
8.4
通讯作者：
Najafabadi, Mehdi Ahmadi
中科院分区：
文献类型：
--
作者：
Javadi, Yashar;Pirzaman, Hamed Salimi;Najafabadi, Mehdi Ahmadi
研究了超声波法测量奥氏体不锈钢管的轴向应力和环向应力。采用纵向临界折射（L-CR）波测量焊接残余应力，同时采用不同频率范围的超声换能器检测管道的外表面和内表面。为了保持管道的完整性，在与所研究管道相同材料和厚度的板上测量声弹性常数。采用三维有限元模型对管道的焊接过程进行了模拟，并采用25点钻孔法进行了验证。将有限元模拟计算的残余应力与超声测量结果进行了比较，两者吻合较好。结果表明，将有限元法与L-CR法（FELCR法）相结合，可以计算出不锈钢管随厚度变化的残余应力。(C) 2013 Elsevier Ltd.版权所有。
This study investigates ultrasonic method in axial and hoop stress measurement through thickness of an austenitic stainless steel pipe. Longitudinal critically refracted (L-CR) waves are employed to measure the welding residual stresses while outer and inner surfaces of the pipe are inspected by using different frequency range of ultrasonic transducers. The acoustoelastic constant is measured on a plate with the same material and thickness of the investigated pipe to keep the pipe intact. Welding process of the pipe is simulated by a 3D finite element (FE) model which is validated by hole-drilling method performed on 25 points. The residual stresses calculated by FE simulation are then compared with those obtained from the ultrasonic measurement while a good agreement is observed. It is demonstrated that the residual stresses through thickness of the stainless steel pipe can be evaluated by combining FE and L-CR method (known as FELCR method). (C) 2013 Elsevier Ltd. All rights reserved.