Strain hardening recovery mediated by coherent precipitates in lightweight steel

Abstract We investigated the effect of κ-carbide precipitates on the strain hardening behavior of aged Fe–Mn-Al-C alloys by microstructure analysis. The κ-carbides-strengthened Fe–Mn-Al-C alloys exhibited a superior strength-ductility balance enabled by the recovery of the strain hardening rate. To...

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Autores principales:	Sung-Dae Kim, Seong-Jun Park, Jae hoon Jang, Joonoh Moon, Heon-Young Ha, Chang-Hoon Lee, Hyungkwon Park, Jong-Ho Shin, Tae-Ho Lee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c3ea7ce612c74f738ad34a91d0e2dc0a
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spelling	oai:doaj.org-article:c3ea7ce612c74f738ad34a91d0e2dc0a2021-12-02T18:30:40ZStrain hardening recovery mediated by coherent precipitates in lightweight steel10.1038/s41598-021-93795-42045-2322https://doaj.org/article/c3ea7ce612c74f738ad34a91d0e2dc0a2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93795-4https://doaj.org/toc/2045-2322Abstract We investigated the effect of κ-carbide precipitates on the strain hardening behavior of aged Fe–Mn-Al-C alloys by microstructure analysis. The κ-carbides-strengthened Fe–Mn-Al-C alloys exhibited a superior strength-ductility balance enabled by the recovery of the strain hardening rate. To understand the relation between the κ-carbides and strain hardening recovery, dislocation gliding in the aged alloys during plastic deformation was analyzed through in situ tensile transmission electron microscopy (TEM). The in situ TEM results confirmed the particle shearing mechanism leads to planar dislocation gliding. During deformation of the 100 h-aged alloy, some gliding dislocations were strongly pinned by the large κ-carbide blocks and were prone to cross-slip, leading to the activation of multiple slip systems. The abrupt decline in the dislocation mean free path was attributed to the activation of multiple slip systems, resulting in the rapid saturation of the strain hardening recovery. It is concluded that the planar dislocation glide and sequential activation of slip systems are key to induce strain hardening recovery in polycrystalline metals. Thus, if a microstructure is designed such that dislocations glide in a planar manner, the strain hardening recovery could be utilized to obtain enhanced mechanical properties of the material.Sung-Dae KimSeong-Jun ParkJae hoon JangJoonoh MoonHeon-Young HaChang-Hoon LeeHyungkwon ParkJong-Ho ShinTae-Ho LeeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sung-Dae Kim Seong-Jun Park Jae hoon Jang Joonoh Moon Heon-Young Ha Chang-Hoon Lee Hyungkwon Park Jong-Ho Shin Tae-Ho Lee Strain hardening recovery mediated by coherent precipitates in lightweight steel
description	Abstract We investigated the effect of κ-carbide precipitates on the strain hardening behavior of aged Fe–Mn-Al-C alloys by microstructure analysis. The κ-carbides-strengthened Fe–Mn-Al-C alloys exhibited a superior strength-ductility balance enabled by the recovery of the strain hardening rate. To understand the relation between the κ-carbides and strain hardening recovery, dislocation gliding in the aged alloys during plastic deformation was analyzed through in situ tensile transmission electron microscopy (TEM). The in situ TEM results confirmed the particle shearing mechanism leads to planar dislocation gliding. During deformation of the 100 h-aged alloy, some gliding dislocations were strongly pinned by the large κ-carbide blocks and were prone to cross-slip, leading to the activation of multiple slip systems. The abrupt decline in the dislocation mean free path was attributed to the activation of multiple slip systems, resulting in the rapid saturation of the strain hardening recovery. It is concluded that the planar dislocation glide and sequential activation of slip systems are key to induce strain hardening recovery in polycrystalline metals. Thus, if a microstructure is designed such that dislocations glide in a planar manner, the strain hardening recovery could be utilized to obtain enhanced mechanical properties of the material.
format	article
author	Sung-Dae Kim Seong-Jun Park Jae hoon Jang Joonoh Moon Heon-Young Ha Chang-Hoon Lee Hyungkwon Park Jong-Ho Shin Tae-Ho Lee
author_facet	Sung-Dae Kim Seong-Jun Park Jae hoon Jang Joonoh Moon Heon-Young Ha Chang-Hoon Lee Hyungkwon Park Jong-Ho Shin Tae-Ho Lee
author_sort	Sung-Dae Kim
title	Strain hardening recovery mediated by coherent precipitates in lightweight steel
title_short	Strain hardening recovery mediated by coherent precipitates in lightweight steel
title_full	Strain hardening recovery mediated by coherent precipitates in lightweight steel
title_fullStr	Strain hardening recovery mediated by coherent precipitates in lightweight steel
title_full_unstemmed	Strain hardening recovery mediated by coherent precipitates in lightweight steel
title_sort	strain hardening recovery mediated by coherent precipitates in lightweight steel
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c3ea7ce612c74f738ad34a91d0e2dc0a
work_keys_str_mv	AT sungdaekim strainhardeningrecoverymediatedbycoherentprecipitatesinlightweightsteel AT seongjunpark strainhardeningrecoverymediatedbycoherentprecipitatesinlightweightsteel AT jaehoonjang strainhardeningrecoverymediatedbycoherentprecipitatesinlightweightsteel AT joonohmoon strainhardeningrecoverymediatedbycoherentprecipitatesinlightweightsteel AT heonyoungha strainhardeningrecoverymediatedbycoherentprecipitatesinlightweightsteel AT changhoonlee strainhardeningrecoverymediatedbycoherentprecipitatesinlightweightsteel AT hyungkwonpark strainhardeningrecoverymediatedbycoherentprecipitatesinlightweightsteel AT jonghoshin strainhardeningrecoverymediatedbycoherentprecipitatesinlightweightsteel AT taeholee strainhardeningrecoverymediatedbycoherentprecipitatesinlightweightsteel
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Strain hardening recovery mediated by coherent precipitates in lightweight steel

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