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Corrugation Reinforced Architectured Materials by Direct Laser Hardening: A Study of Geometrically Induced Work Hardening in Steel

Article dans une revue avec comité de lecture
Author
WANG, Zhige
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
BOUAZIZ, Olivier
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
243747 Labex DAMAS
ccDIRRENBERGER, Justin
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
ccLAPOUGE, Pierre
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/23561
DOI
10.1002/srin.202200695
Date
2023-03
Journal
Steel research international

Abstract

Improving the strength-to-ductility trade-off remains the prime driving force for the development of advanced high-strength steel. Traditionally research breakthroughs are focused on the microstructure and relative phase composition. Herein, laser hardening is applied to ductile ferritic steel to introduce straight and corrugated martensitic reinforcements, effectivelgenerating architectured steel sheets. Tensile behavior of laser-architectured samples is studied both using finite-element method simulation and mechanical testing to reveal the effect of laser-induced corrugations on strength and necking strain. The results show that with the same reinforced volume fraction of 24%, an increase in corrugation height/period leads to a gain in necking strain with a loss in yield strength and ultimate tensile stress. This beneficial effect on necking strain is due to the corrugation unbending process which introduces so-called geometric work hardening during tension. Extended simulations are carried out on various corrugation heights/periods and the evolution trends of ultimate tensile strength and necking change with different reinforced volumes. This study proposes a perspective on corrugation-reinforced architectured materials. Corrugation parameters can be chosen to tailor the mechanical behavior of laser-architectured materials.

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