Investigating the dislocation reactions on Σ3{111} twin boundary during deformation twin nucleation process in an ultrafine-grained high-manganese steel

Abstract Some of ultrafine-grained (UFG) metals including UFG twinning induced plasticity (TWIP) steels have been found to overcome the paradox of strength and ductility in metals benefiting from their unique deformation modes. Here, this study provides insights into the atomistic process of deforma...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Chang-Yu Hung, Tomotsugu Shimokawa, Yu Bai, Nobuhiro Tsuji, Mitsuhiro Murayama
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1885a53d6c2a47919b39a06d081c9623
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:1885a53d6c2a47919b39a06d081c9623
record_format	dspace
spelling	oai:doaj.org-article:1885a53d6c2a47919b39a06d081c96232021-12-02T19:17:00ZInvestigating the dislocation reactions on Σ3{111} twin boundary during deformation twin nucleation process in an ultrafine-grained high-manganese steel10.1038/s41598-021-98875-z2045-2322https://doaj.org/article/1885a53d6c2a47919b39a06d081c96232021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98875-zhttps://doaj.org/toc/2045-2322Abstract Some of ultrafine-grained (UFG) metals including UFG twinning induced plasticity (TWIP) steels have been found to overcome the paradox of strength and ductility in metals benefiting from their unique deformation modes. Here, this study provides insights into the atomistic process of deformation twin nucleation at Σ3{111} twin boundaries, the dominant type of grain boundary in this UFG high manganese TWIP steel. In response to the applied tensile stresses, grain boundary sliding takes place which changes the structure of coherent Σ3{111} twin boundary from atomistically smooth to partly defective. High resolution transmission electron microscopy demonstrates that the formation of disconnection on Σ3{111} twin boundaries is associated with the motion of Shockley partial dislocations on the boundaries. The twin boundary disconnections act as preferential nucleation sites for deformation twin that is a characteristic difference from the coarse-grained counterpart, and is likely correlated with the lethargy of grain interior dislocation activities, frequently seen in UFG metals. The deformation twin nucleation behavior will be discussed based on in-situ TEM deformation experiments and nanoscale strain distribution analyses results.Chang-Yu HungTomotsugu ShimokawaYu BaiNobuhiro TsujiMitsuhiro MurayamaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chang-Yu Hung Tomotsugu Shimokawa Yu Bai Nobuhiro Tsuji Mitsuhiro Murayama Investigating the dislocation reactions on Σ3{111} twin boundary during deformation twin nucleation process in an ultrafine-grained high-manganese steel
description	Abstract Some of ultrafine-grained (UFG) metals including UFG twinning induced plasticity (TWIP) steels have been found to overcome the paradox of strength and ductility in metals benefiting from their unique deformation modes. Here, this study provides insights into the atomistic process of deformation twin nucleation at Σ3{111} twin boundaries, the dominant type of grain boundary in this UFG high manganese TWIP steel. In response to the applied tensile stresses, grain boundary sliding takes place which changes the structure of coherent Σ3{111} twin boundary from atomistically smooth to partly defective. High resolution transmission electron microscopy demonstrates that the formation of disconnection on Σ3{111} twin boundaries is associated with the motion of Shockley partial dislocations on the boundaries. The twin boundary disconnections act as preferential nucleation sites for deformation twin that is a characteristic difference from the coarse-grained counterpart, and is likely correlated with the lethargy of grain interior dislocation activities, frequently seen in UFG metals. The deformation twin nucleation behavior will be discussed based on in-situ TEM deformation experiments and nanoscale strain distribution analyses results.
format	article
author	Chang-Yu Hung Tomotsugu Shimokawa Yu Bai Nobuhiro Tsuji Mitsuhiro Murayama
author_facet	Chang-Yu Hung Tomotsugu Shimokawa Yu Bai Nobuhiro Tsuji Mitsuhiro Murayama
author_sort	Chang-Yu Hung
title	Investigating the dislocation reactions on Σ3{111} twin boundary during deformation twin nucleation process in an ultrafine-grained high-manganese steel
title_short	Investigating the dislocation reactions on Σ3{111} twin boundary during deformation twin nucleation process in an ultrafine-grained high-manganese steel
title_full	Investigating the dislocation reactions on Σ3{111} twin boundary during deformation twin nucleation process in an ultrafine-grained high-manganese steel
title_fullStr	Investigating the dislocation reactions on Σ3{111} twin boundary during deformation twin nucleation process in an ultrafine-grained high-manganese steel
title_full_unstemmed	Investigating the dislocation reactions on Σ3{111} twin boundary during deformation twin nucleation process in an ultrafine-grained high-manganese steel
title_sort	investigating the dislocation reactions on σ3{111} twin boundary during deformation twin nucleation process in an ultrafine-grained high-manganese steel
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1885a53d6c2a47919b39a06d081c9623
work_keys_str_mv	AT changyuhung investigatingthedislocationreactionsons3111twinboundaryduringdeformationtwinnucleationprocessinanultrafinegrainedhighmanganesesteel AT tomotsugushimokawa investigatingthedislocationreactionsons3111twinboundaryduringdeformationtwinnucleationprocessinanultrafinegrainedhighmanganesesteel AT yubai investigatingthedislocationreactionsons3111twinboundaryduringdeformationtwinnucleationprocessinanultrafinegrainedhighmanganesesteel AT nobuhirotsuji investigatingthedislocationreactionsons3111twinboundaryduringdeformationtwinnucleationprocessinanultrafinegrainedhighmanganesesteel AT mitsuhiromurayama investigatingthedislocationreactionsons3111twinboundaryduringdeformationtwinnucleationprocessinanultrafinegrainedhighmanganesesteel
_version_	1718376899421405184

Investigating the dislocation reactions on Σ3{111} twin boundary during deformation twin nucleation process in an ultrafine-grained high-manganese steel

Ejemplares similares