Boruah Dibakor, Dewagtere Nele, Ahmad Bilal, Nunes Rafael, Tacq Jeroen, Zhang Xiang, Guo Hua, Verlinde Wim, De Waele Wim
Department of Electromechanical, Systems and Metal Engineering, Faculty of Engineering and Architecture, Ghent University, 9052 Ghent, Belgium.
Faculty of Engineering, Environment and Computing, Coventry University, Coventry CV1 5FB, UK.
Materials (Basel). 2023 Feb 17;16(4):1702. doi: 10.3390/ma16041702.
This study aims to demonstrate the capability of the digital image correlation (DIC) technique for evaluating full-field residual stresses in wire and arc additive manufactured (WAAM) components. Investigations were carried out on WAAM steel parts (wall deposited on a substrate) with two different wall heights: 24 mm and 48 mm. Mild steel solid wire AWS ER70S-6 was used to print WAAM walls on substrates that were rigidly clamped to H-profiles. DIC was used to monitor the bending deformation of WAAM parts during unclamping from the H-profiles, and residual stresses were calculated from the strain field captured during unclamping. Residual stresses determined from the proposed DIC-based method were verified with an analytical model and validated by the results from established residual stress measurement techniques, i.e., the contour method and X-ray diffraction.
本研究旨在证明数字图像相关（DIC）技术评估电弧增材制造（WAAM）部件全场残余应力的能力。对两种不同壁高（24毫米和48毫米）的WAAM钢部件（沉积在基板上的壁）进行了研究。采用低碳钢实心焊丝AWS ER70S-6在刚性夹紧到H型钢的基板上打印WAAM壁。DIC用于监测WAAM部件从H型钢上松开过程中的弯曲变形，并根据松开过程中捕获的应变场计算残余应力。通过解析模型对基于DIC的方法确定的残余应力进行了验证，并通过既定的残余应力测量技术（即轮廓法和X射线衍射）的结果进行了验证。
