Temperature-Dependent Dynamic Strain Aging in Selective Laser Melted 316L

Diepold B, Neumeier S, Meermeier A, Höppel HW, Sebald T, Göken M (2021)

Publication Type: Journal article

Publication year: 2021

Journal

DOI: 10.1002/adem.202001501

Abstract

Additively manufactured austenitic stainless steel AISI 316L (EN 1.4404, X2CrNiMo17-12-2) is used at higher temperatures, e.g., in space applications. However, the high-temperature properties of such materials have not been analyzed in detail yet. Thus, selective laser melted (SLM) 316L is tested in the solution-annealed condition by compression and tensile tests at temperatures between 25 and 877 °C. The compressive strength of SLM 316L is higher in comparison with the conventionally produced reference material due to hardening by a high dislocation density and a fine substructure. However, tensile tests reveal a loss in ductility of the SLM material at temperatures between 300 and 627 °C, where the elongation to fracture is reduced from 65% to 39%. Alloying elements cause serrated yielding in the affected temperature range. Together with an increased normalized work-hardening rate and a negative strain rate sensitivity, dynamic strain aging is found to cause the reduction of ductility.

Authors with CRIS profile

Additional Organisation(s)

Involved external institutions

ArianeGroup France (FR)

How to cite

APA:

Diepold, B., Neumeier, S., Meermeier, A., Höppel, H.W., Sebald, T., & Göken, M. (2021). Temperature-Dependent Dynamic Strain Aging in Selective Laser Melted 316L. Advanced Engineering Materials. https://doi.org/10.1002/adem.202001501

MLA:

Diepold, Benedikt, et al. "Temperature-Dependent Dynamic Strain Aging in Selective Laser Melted 316L." Advanced Engineering Materials (2021).

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