Compressive behavior of 420 stainless steel after asynchronous laser processing |
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| Affiliation: | 1. Department of Mechanical and Materials Engineering, University of Nebraska, Lincoln, NE 68588, United States;2. Department of Mechanical Engineering, Jazan University, Gizan, Jazan, 45142, Saudi Arabia;3. School of Engineering, The University of Edinburgh, Edinburgh EH9 3FB, UK;1. Dept. of Mechanical and Materials Engineering, University of Nebraska, Lincoln, NE, USA;2. Dept. of Mechanical Engineering, Jazan University, Gizan, Jazan, Saudi Arabia;1. Welding Engineering and Laser Processing Centre, Cranfield University, MK43 0AL Cranfield, UK;2. Centre for Manufacturing and Materials Engineering, Coventry University, Priory Street, Coventry CV1 5FB, UK;3. ISIS Facility, Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, UK |
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| Abstract: | Cold working layers during additive manufacturing improves toughness by imparting a complex glocal integrity across pre-designed internally reinforced domains. Understanding mechanical behavior by mapping glocal integrity across these domains is difficult due to highly heterogeneous compositions formed by cyclic printing and peening. Ultrasound is proposed as a rapid, non-destructive tool to measure glocal integrity that is sensitive to heterogeneous organization of microstructure and residual stress. This work examines compressive behavior and measures glocal integrity with ultrasonic wave speed and attenuation perpendicular to the build direction after cyclically coupling laser engineered net shaping (LENS®) with laser peening on 420 stainless steel. |
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