Unique transition of yielding mechanism and unexpected activation of deformation twinning in ultrafine grained Fe-31Mn-3Al-3Si alloy

Abstract Tensile mechanical properties of fully recrystallized TWIP steel specimens having various grain sizes (d) ranging from 0.79 μm to 85.6 μm were investigated. It was confirmed that the UFG specimens having the mean grain sizes of 1.5 μm or smaller abnormally showed discontinuous yielding char...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Yu Bai, Hiroki Kitamura, Si Gao, Yanzhong Tian, Nokeun Park, Myeong-heom Park, Hiroki Adachi, Akinobu Shibata, Masugu Sato, Mitsuhiro Murayama, Nobuhiro Tsuji
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/86bd8bb69e144719add2355a61094a95
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:86bd8bb69e144719add2355a61094a95
record_format	dspace
spelling	oai:doaj.org-article:86bd8bb69e144719add2355a61094a952021-12-02T17:06:10ZUnique transition of yielding mechanism and unexpected activation of deformation twinning in ultrafine grained Fe-31Mn-3Al-3Si alloy10.1038/s41598-021-94800-62045-2322https://doaj.org/article/86bd8bb69e144719add2355a61094a952021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94800-6https://doaj.org/toc/2045-2322Abstract Tensile mechanical properties of fully recrystallized TWIP steel specimens having various grain sizes (d) ranging from 0.79 μm to 85.6 μm were investigated. It was confirmed that the UFG specimens having the mean grain sizes of 1.5 μm or smaller abnormally showed discontinuous yielding characterized by a clear yield-drop while the specimens having grain sizes larger than 2.4 μm showed normal continuous yielding. In-situ synchrotron radiation XRD showed dislocation density around yield-drop in the UFG specimen quickly increased. ECCI observations revealed the nucleation of deformation twins and stacking faults from grain boundaries in the UFG specimen around yielding. Although it had been conventionally reported that the grain refinement suppresses deformation twinning in FCC metals and alloys, the number density of deformation twins in the 0.79 μm grain-sized specimen was much higher than that in the specimens with grain sizes of 4.5 μm and 15.4 μm. The unusual change of yielding behavior from continuous to discontinuous manner by grain refinement could be understood on the basis of limited number of free dislocations in each ultrafine grain. The results indicated that the scarcity of free dislocations in the recrystallized UFG specimens changed the deformation and twinning mechanisms in the TWIP steel.Yu BaiHiroki KitamuraSi GaoYanzhong TianNokeun ParkMyeong-heom ParkHiroki AdachiAkinobu ShibataMasugu SatoMitsuhiro MurayamaNobuhiro TsujiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yu Bai Hiroki Kitamura Si Gao Yanzhong Tian Nokeun Park Myeong-heom Park Hiroki Adachi Akinobu Shibata Masugu Sato Mitsuhiro Murayama Nobuhiro Tsuji Unique transition of yielding mechanism and unexpected activation of deformation twinning in ultrafine grained Fe-31Mn-3Al-3Si alloy
description	Abstract Tensile mechanical properties of fully recrystallized TWIP steel specimens having various grain sizes (d) ranging from 0.79 μm to 85.6 μm were investigated. It was confirmed that the UFG specimens having the mean grain sizes of 1.5 μm or smaller abnormally showed discontinuous yielding characterized by a clear yield-drop while the specimens having grain sizes larger than 2.4 μm showed normal continuous yielding. In-situ synchrotron radiation XRD showed dislocation density around yield-drop in the UFG specimen quickly increased. ECCI observations revealed the nucleation of deformation twins and stacking faults from grain boundaries in the UFG specimen around yielding. Although it had been conventionally reported that the grain refinement suppresses deformation twinning in FCC metals and alloys, the number density of deformation twins in the 0.79 μm grain-sized specimen was much higher than that in the specimens with grain sizes of 4.5 μm and 15.4 μm. The unusual change of yielding behavior from continuous to discontinuous manner by grain refinement could be understood on the basis of limited number of free dislocations in each ultrafine grain. The results indicated that the scarcity of free dislocations in the recrystallized UFG specimens changed the deformation and twinning mechanisms in the TWIP steel.
format	article
author	Yu Bai Hiroki Kitamura Si Gao Yanzhong Tian Nokeun Park Myeong-heom Park Hiroki Adachi Akinobu Shibata Masugu Sato Mitsuhiro Murayama Nobuhiro Tsuji
author_facet	Yu Bai Hiroki Kitamura Si Gao Yanzhong Tian Nokeun Park Myeong-heom Park Hiroki Adachi Akinobu Shibata Masugu Sato Mitsuhiro Murayama Nobuhiro Tsuji
author_sort	Yu Bai
title	Unique transition of yielding mechanism and unexpected activation of deformation twinning in ultrafine grained Fe-31Mn-3Al-3Si alloy
title_short	Unique transition of yielding mechanism and unexpected activation of deformation twinning in ultrafine grained Fe-31Mn-3Al-3Si alloy
title_full	Unique transition of yielding mechanism and unexpected activation of deformation twinning in ultrafine grained Fe-31Mn-3Al-3Si alloy
title_fullStr	Unique transition of yielding mechanism and unexpected activation of deformation twinning in ultrafine grained Fe-31Mn-3Al-3Si alloy
title_full_unstemmed	Unique transition of yielding mechanism and unexpected activation of deformation twinning in ultrafine grained Fe-31Mn-3Al-3Si alloy
title_sort	unique transition of yielding mechanism and unexpected activation of deformation twinning in ultrafine grained fe-31mn-3al-3si alloy
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/86bd8bb69e144719add2355a61094a95
work_keys_str_mv	AT yubai uniquetransitionofyieldingmechanismandunexpectedactivationofdeformationtwinninginultrafinegrainedfe31mn3al3sialloy AT hirokikitamura uniquetransitionofyieldingmechanismandunexpectedactivationofdeformationtwinninginultrafinegrainedfe31mn3al3sialloy AT sigao uniquetransitionofyieldingmechanismandunexpectedactivationofdeformationtwinninginultrafinegrainedfe31mn3al3sialloy AT yanzhongtian uniquetransitionofyieldingmechanismandunexpectedactivationofdeformationtwinninginultrafinegrainedfe31mn3al3sialloy AT nokeunpark uniquetransitionofyieldingmechanismandunexpectedactivationofdeformationtwinninginultrafinegrainedfe31mn3al3sialloy AT myeongheompark uniquetransitionofyieldingmechanismandunexpectedactivationofdeformationtwinninginultrafinegrainedfe31mn3al3sialloy AT hirokiadachi uniquetransitionofyieldingmechanismandunexpectedactivationofdeformationtwinninginultrafinegrainedfe31mn3al3sialloy AT akinobushibata uniquetransitionofyieldingmechanismandunexpectedactivationofdeformationtwinninginultrafinegrainedfe31mn3al3sialloy AT masugusato uniquetransitionofyieldingmechanismandunexpectedactivationofdeformationtwinninginultrafinegrainedfe31mn3al3sialloy AT mitsuhiromurayama uniquetransitionofyieldingmechanismandunexpectedactivationofdeformationtwinninginultrafinegrainedfe31mn3al3sialloy AT nobuhirotsuji uniquetransitionofyieldingmechanismandunexpectedactivationofdeformationtwinninginultrafinegrainedfe31mn3al3sialloy
_version_	1718381686167699456

Unique transition of yielding mechanism and unexpected activation of deformation twinning in ultrafine grained Fe-31Mn-3Al-3Si alloy

Ejemplares similares