Residual stresses at laser surface remelting and additive manufacturing

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A thermo-elastic model for calculation of the residual stresses is proposed and experimentally validated. Residual stresses depend on the shape of the remelted domain but are independent of its size. The maximum tensile residual stresses arise in the remelted region in the scanning direction. The calculated longitudinal tensile stresses are about twice greater than the transversal ones. The model explains formation of two systems of longitudinal and transversal cracks observed in experiments. The residual stresses are proportional to the difference between the ambient and melting temperatures, which justifies the known method to reduce the stresses by preheating. © 2011 Published by Elsevier Ltd.




Gusarov, A. V., Pavlov, M., & Smurov, I. (2011). Residual stresses at laser surface remelting and additive manufacturing. In Physics Procedia (Vol. 12, pp. 248–254). Elsevier B.V.

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