Residual Stresses at Laser Surface Remelting and Additive Manufacturing

By A. Gusarov, M. Pavlov, I. Smurov. 2011

148 citations recorded by the source corpus.

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.

Subfields: Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/c281a4df073c044a28f6f3b61393e1407aca074c

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In Mechanical Engineering

1. Xiao Zhao
2. Qingsong Wei
3. Changjun Han
4. Jie Liu
5. Shifeng Wen
6. B. Song
7. Yusheng Shi
8. Shuai Li

Citations in the corpus

• Additive manufacturing of WC-Co hardmetals: a review (2020, background): “Cracks form under the effect of residual stress [80].”
• Differences in microstructure and properties between selective laser melting and traditional manufacturing for fabrication of metal parts: A review (2015, background): “[41] reported based on the stress field simulation results that residual stress can be reduced by improving the SLM preheating temperature.”