Investigation of Elastic Modulus Degradation and Recovery with Time and Baking Process for Deformed Automotive Steel Sheets

Lee, Shin-Yeong; Park, Hong-Sang; Kim, Jin Hwan; Barlat, Frédéric; Chung, Kyung‐Hwan

doi:10.1007/s12540-022-01268-8

Met. Mater. Int.

2022

DOI: 10.1007/s12540-022-01268-8

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Investigation of Elastic Modulus Degradation and Recovery with Time and Baking Process for Deformed Automotive Steel Sheets

Shin-Yeong Lee

Hong-Sang Park

Jin Hwan Kim

et al.

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Cited by 13 publications

References 37 publications

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Improving the Mechanical Properties of Low‐Carbon Steel by In Situ Strain Aging

Gu,

Seo,

Kim

2023

Adv Eng Mater

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We have developed a novel continuous process that utilizes the concept of strain aging not only in the automotive industry but also in structural materials as a whole. The principle behind achieving in‐situ strain aging is as follows: (i) Dislocations are generated through compressive deformation during continuous pressing. (ii) The processing conditions at the strain aging temperature create a favorable environment for the diffusion of interstitial atoms, leading to the formation of Cottrell atmospheres. The in‐situ strain aging processed low‐carbon steel demonstrates a significant increase in strength compared to the unprocessed sample (increased yield strength by ∽37.6 MPa), which can be attributed to the strain aging effect, as well as the combined effects of grain refinement and pre‐existing dislocations. Additionally, the generation of dislocations during compressive deformation suppressed void nucleation during pre‐strain, preventing a loss of elongation (reduced uniform elongation by ∽1.5%). The in‐situ strain aging processed low‐carbon steel exhibited a superior strength‐elongation combination compared to both the unprocessed low‐carbon steel and strain aging simulated counterparts obtained through tensile deformation.This article is protected by copyright. All rights reserved.

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Improving the Mechanical Properties of Low‐Carbon Steel by In Situ Strain Aging

Gu,

Seo,

Kim

2023

Adv Eng Mater

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Shear Deformation Behavior of Heterostructured Materials: Experimental and Numerical Analyses

Gu,

Lee,

Seo

et al. 2023

Met. Mater. Int.

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Numerical fracture prediction of martensitic steel by uncoupled and coupled type fracture models

Lee

Kim

Barlat

et al. 2023

Engineering Fracture Mechanics

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Investigation of Elastic Modulus Degradation and Recovery with Time and Baking Process for Deformed Automotive Steel Sheets

Cited by 13 publications

References 37 publications

Improving the Mechanical Properties of Low‐Carbon Steel by In Situ Strain Aging

Improving the Mechanical Properties of Low‐Carbon Steel by In Situ Strain Aging

Shear Deformation Behavior of Heterostructured Materials: Experimental and Numerical Analyses

Numerical fracture prediction of martensitic steel by uncoupled and coupled type fracture models

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