Laser peening: A tool for additive manufacturing post-processing
By L. Hackel, J. Rankin, A. Rubenchik, Wayne E. King, Manyalibo Matthews. Additive Manufacturing, 2018
165 citations recorded by the source corpus.
Abstract Additive manufacturing (AM) is rapidly moving from research to commercial applications due to its ability to produce geometric features difficult or impossible to generate by conventional machining. Fielded components need to endure fatigue loadings over long operational lifetimes. This work evaluates the ability of shot and laser peening to enhance the fatigue lifetime and strength of AM parts. As previously shown, peening processes induce beneficial microstructure and residual stress enhancement; this work takes a step to demonstrate the fatigue enhancement of peening including for the case of geometric stress risers as expected for fielded AM components. We present AM sample fatigue results with and without a stress riser using untreated baseline samples and shot and laser peening surface treatments. Laser peening is clearly shown to provide superior fatigue life and strength. We also investigated the ability of analysis to select laser peening parameters and coverage that can shape and/or correctively reshape AM components to a high degree of precision. We demonstrated this potential by shaping and shape correction using our finite element based predictive modeling and highly controlled laser peening.
Subfields: Automotive Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/9270beb7ecfbe0a4d885cf599fca74f8e88c49fc
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Citations in the corpus
- Additive manufacturing of WC-Co hardmetals: a review (2020, background): “For SLM, due to the extremely high cooling rates and thermal cycle, the sample produced by SLM has an uneven microstructure with high residual stress, and is very prone to form defects such as porosities and micro-cracks [75, 100, 109].”
- Effects of defects on mechanical properties in metal additive manufacturing: A review focusing on X-ray tomography insights (2020, methodology): “Popular methods include shot peening [117,118] and laser shock peening [119], both of which have been shown to improve mechanical properties.”