PSI - Issue 19

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000

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ScienceDirect

Procedia Structural Integrity 19 (2019) 452–462

Fatigue Design 2019 Test Results for Wrought and AM In718 Treated by Shot Peening and Laser Peening Plus Thermal Microstructure Engineering Fatigue Design 2019 Test Results for Wrought and AM In718 Treated by Shot Peening and Laser Peening Plus Thermal Microstructure Engineering

Lloyd Hackel *1 , Jochen Fuhr 1 , Montu Sharma 1 , Jon Rankin 1 , Vincent Sherman 1 , Keivan Davami 2 * Lloyd Hackel *1 , Jochen Fuhr 1 , Montu Sharma 1 , Jon Rankin 1 , Vincent Sherman 1 , Keivan Davami 2 *

1 Metal Improvement Company, Surface Technologies, Curtiss Wright, Livermore, CA, U.S.A 2 Department of Mechanical Engineering, The University of Alabama, Tuscaloosa, USA 1 Metal Improvement Company, Surface Technologies, Curtiss Wright, Livermore, CA, U.S.A 2 Department of Mechanical Engineering, The University of Alabama, Tuscaloosa, USA

Abstract Fatigue improvement by shot peening and laser peening on additive manufacturing. Abstract Fatigue improvement by shot peening and laser peening on additive manufacturing.

Fatigue life improvement by shot peening (SP) and laser peening (LP) on metals is already well known. However, we are short of information about results on manufacturing (AM) parts, which are characterized by bad surface finishing, micro-porosities and structural defects. This paperstudies the effects of SP and LP on AM In718. Residual stress profiles, fractures surface, fatigue results will be detailed. Different thermal microstructure and surface preparations are compared: raw AM, SP, LP, polished. Fatigue life improvement by shot peening (SP) and laser peening (LP) on metals is already well known. However, we are short of information about results on manufacturing (AM) parts, which are characterized by bad surface finishing, micro-porosities and structural defects. This paperstudies the effects of SP and LP on AM In718. Residual stress profiles, fractures surface, fatigue results will be detailed. Different thermal microstructure and surface preparations are compared: raw AM, SP, LP, polished.

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. Keywords: Additive Manufacturing, Laser Peening, Shot Peening, Thermal, Fatigue Keywords: Additive Manufacturing, Laser Peening, Shot Peening, Thermal, Fatigue

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. * Corresponding author. E-mail address: Lloyd.Hackel@cwst.com * Corresponding author. E-mail address: Lloyd.Hackel@cwst.com

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. 10.1016/j.prostr.2019.12.049