This paper investigates the influence of post treatments on the fatigue properties of 316L stainless steel produced by laser powder bed fusion. Miniaturised fatigue samples are built in vertical orientation with optimised process conditions to result in very low porosities and minimal scatter in results. Fatigue performance is evaluated for two different material conditions: as-built and stress-relieved, at a nominal load ratio of −1. Furthermore, the samples are tested with and without surface machining. A thorough microstructural and fractographic analysis is performed to evaluate the impact of the main fatigue influencing factors. The results show that the fatigue behaviour of machined samples with and without stress relief heat treatment exceeds that of conventionally manufactured 316L. © 2019 Elsevier Ltd

Effect of post-treatments on the fatigue behaviour of 316L stainless steel manufactured by laser powder bed fusion / Elangeswaran, C.; Cutolo, A.; Muralidharan, G. K.; de Formanoir, C.; Berto, Filippo; Vanmeensel, K.; Van Hooreweder, B.. - In: INTERNATIONAL JOURNAL OF FATIGUE. - ISSN 0142-1123. - 123:(2019), pp. 31-39. [10.1016/j.ijfatigue.2019.01.013]

Effect of post-treatments on the fatigue behaviour of 316L stainless steel manufactured by laser powder bed fusion

Berto Filippo;
2019

Abstract

This paper investigates the influence of post treatments on the fatigue properties of 316L stainless steel produced by laser powder bed fusion. Miniaturised fatigue samples are built in vertical orientation with optimised process conditions to result in very low porosities and minimal scatter in results. Fatigue performance is evaluated for two different material conditions: as-built and stress-relieved, at a nominal load ratio of −1. Furthermore, the samples are tested with and without surface machining. A thorough microstructural and fractographic analysis is performed to evaluate the impact of the main fatigue influencing factors. The results show that the fatigue behaviour of machined samples with and without stress relief heat treatment exceeds that of conventionally manufactured 316L. © 2019 Elsevier Ltd
3d printers; ductility; fatigue of materials; stainless steel; stress relief; surface treatment, 316 l stainless steel; fatigue behaviour; fatigue performance; fatigue properties; fractographic analysis; material conditions; s-n curve; surface machining, austenitic stainless steel; additive manufacturing; ductility; s-n curves; stainless steel; surface treatments
01 Pubblicazione su rivista::01a Articolo in rivista
Effect of post-treatments on the fatigue behaviour of 316L stainless steel manufactured by laser powder bed fusion / Elangeswaran, C.; Cutolo, A.; Muralidharan, G. K.; de Formanoir, C.; Berto, Filippo; Vanmeensel, K.; Van Hooreweder, B.. - In: INTERNATIONAL JOURNAL OF FATIGUE. - ISSN 0142-1123. - 123:(2019), pp. 31-39. [10.1016/j.ijfatigue.2019.01.013]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1654439
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