Laser peening: A tool for additive manufacturing post-processing

Hackel, Lloyd; Rankin, Jon R.; Rubenchik, Alexander; King, Wayne E.; Matthews, Manyalibo

doi:10.1016/j.addma.2018.09.013

Title: Laser peening: A tool for additive manufacturing post-processing

Journal Article · Fri Sep 14 00:00:00 EDT 2018 · Additive Manufacturing

DOI:https://doi.org/10.1016/j.addma.2018.09.013· OSTI ID:1497297

Hackel, Lloyd ^[1]; Rankin, Jon R. ^[1]; Rubenchik, Alexander ^[2];

^[3]; Matthews, Manyalibo ^[3]

Curtiss Wright Surface Technologies - Metal Improvement Company, Livermore, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). National Ignition Facility (NIF). Photon Sciences Directorate
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Sciences Directorate

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.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1497297

Alternate ID(s):: OSTI ID: 1762837

Report Number(s):: LLNL-JRNL-739309; LLNL-JRNL-818382; 892864

Journal Information:: Additive Manufacturing, Vol. 24; ISSN 2214-8604

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 81 works

Citation information provided by
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Cited By (6)

Nanomechanical Characterization of Laser Peened Additively Manufactured Inconel 718 Superalloy Palma, Tyler; Munther, Michael; Sharma, Montu Advanced Engineering Materials, Vol. 21, Issue 9 https://doi.org/10.1002/adem.201900499	journal	July 2019
3D laser shock peening as a way to improve geometrical accuracy in selective laser melting Kalentics, Nikola; Burn, Andreas; Cloots, Michael The International Journal of Advanced Manufacturing Technology, Vol. 101, Issue 5-8 https://doi.org/10.1007/s00170-018-3033-3	journal	November 2018
Simulation and Experimental Study on Residual Stress Distribution in Titanium Alloy Treated by Laser Shock Peening with Flat-Top and Gaussian Laser Beams Li, Xiang; He, Weifeng; Luo, Sihai Materials, Vol. 12, Issue 8 https://doi.org/10.3390/ma12081343	journal	April 2019
Printability and Microstructure of Selective Laser Melting of WC/Co/Cr Powder Campanelli, Sabina Luisa; Contuzzi, Nicola; Posa, Paolo Materials, Vol. 12, Issue 15 https://doi.org/10.3390/ma12152397	journal	July 2019
Effect of Friction Stir Processing on Microstructural, Mechanical, and Corrosion Properties of Al-Si12 Additive Manufactured Components Moeini, Ghazal; Sajadifar, Seyed Vahid; Engler, Tom Metals, Vol. 10, Issue 1 https://doi.org/10.3390/met10010085	journal	January 2020
Laser Shock Peening: Toward the Use of Pliable Solid Polymers for Confinement Le Bras, Corentin; Rondepierre, Alexandre; Seddik, Raoudha Metals, Vol. 9, Issue 7 https://doi.org/10.3390/met9070793	journal	July 2019

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Title: Laser peening: A tool for additive manufacturing post-processing

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