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• W3155128516 endingPage "110462" @default.
• W3155128516 startingPage "110462" @default.
• W3155128516 abstract "Laser powder bed fusion (LPBF) is an additive manufacturing technology to fabricate parts with complex geometries. Residual stresses induced by the rapid heating and cooling processes may cause defects such as cracks, distortion and delamination. This work presents an in-depth study for the understanding of the evolution of residual stresses during LPBF of Ti-6Al-4V. A 3D finite element model was developed to study the spatiotemporal variations of the temperature and the stresses during multi-track and multi-layer LPBF. The results show that the scanning strategies significantly affected the temperature gradients and the resultant stress distributions. The induced residual stresses were higher along the laser scanning direction than that along the perpendicular direction. Monitored at the longitudinal central plane, stresses changed from compressive to tensile along the vertical build direction from the substrate to the top of the build. The Z-component of stress was smaller than the X- and Y-components stresses. The peak tensile Z-component of stress was at the interface between the part and the substrate, which may lead to local warping and cracking. The findings from this work provide insights for the understanding of stress related issues such as the massive longitudinal and transverse solidification cracking during LPBF." @default.
• W3155128516 created "2021-04-26" @default.
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• W3155128516 date "2021-07-01" @default.
• W3155128516 modified "2023-10-05" @default.
• W3155128516 title "Spatiotemporal variations of residual stresses during multi-track and multi-layer deposition for laser powder bed fusion of Ti-6Al-4V" @default.
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• W3155128516 doi "https://doi.org/10.1016/j.commatsci.2021.110462" @default.
• W3155128516 hasPublicationYear "2021" @default.
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