Revealing grain coarsening and detwinning in bimodal Cu under tension

Metals with a bimodal grain size distribution have been found to have both high strength and good ductility. However, the coordinated deformation mechanisms underneath the ultrafine-grains (UFGs) and coarse grains (CGs) still remain undiscovered yet. In present work, a bimodal Cu with 80% volume fra...

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Autores principales:	Liu Silu, Zhao Yonghao
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	bimodal grain size distribution ufg cu grain coarsening detwinning Technology T Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/fa6128f231b04287baeedd60689cc687
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spelling	oai:doaj.org-article:fa6128f231b04287baeedd60689cc6872021-12-05T14:11:02ZRevealing grain coarsening and detwinning in bimodal Cu under tension1605-812710.1515/rams-2021-0001https://doaj.org/article/fa6128f231b04287baeedd60689cc6872021-01-01T00:00:00Zhttps://doi.org/10.1515/rams-2021-0001https://doaj.org/toc/1605-8127Metals with a bimodal grain size distribution have been found to have both high strength and good ductility. However, the coordinated deformation mechanisms underneath the ultrafine-grains (UFGs) and coarse grains (CGs) still remain undiscovered yet. In present work, a bimodal Cu with 80% volume fraction of recrystallized micro-grains was prepared by the annealing of equal-channel angular pressing (ECAP) processed ultrafine grained Cu at 473 K for 40 min. The bimodal Cu has an optimal strength-ductility combination (yield strength of 220 MPa and ductility of 34%), a larger shear fracture angle of 83° and a larger area reduction of 78% compared with the as-ECAPed UFG Cu (yield strength of 410 MPa, ductility of 16%, shear fracture angle of 70°, area reduction of 69%). Grain refinement of recrystallized micro-grains and detwinning of annealing growth twins were observed in the fractured bimodal Cu tensile specimen. The underlying deformation mechanisms for grain refinement and detwinning were analyzed and discussed.Liu SiluZhao YonghaoDe Gruyterarticlebimodal grain size distributionufg cugrain coarseningdetwinningTechnologyTChemical technologyTP1-1185ENReviews on Advanced Materials Science, Vol 60, Iss 1, Pp 15-24 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bimodal grain size distribution ufg cu grain coarsening detwinning Technology T Chemical technology TP1-1185
spellingShingle	bimodal grain size distribution ufg cu grain coarsening detwinning Technology T Chemical technology TP1-1185 Liu Silu Zhao Yonghao Revealing grain coarsening and detwinning in bimodal Cu under tension
description	Metals with a bimodal grain size distribution have been found to have both high strength and good ductility. However, the coordinated deformation mechanisms underneath the ultrafine-grains (UFGs) and coarse grains (CGs) still remain undiscovered yet. In present work, a bimodal Cu with 80% volume fraction of recrystallized micro-grains was prepared by the annealing of equal-channel angular pressing (ECAP) processed ultrafine grained Cu at 473 K for 40 min. The bimodal Cu has an optimal strength-ductility combination (yield strength of 220 MPa and ductility of 34%), a larger shear fracture angle of 83° and a larger area reduction of 78% compared with the as-ECAPed UFG Cu (yield strength of 410 MPa, ductility of 16%, shear fracture angle of 70°, area reduction of 69%). Grain refinement of recrystallized micro-grains and detwinning of annealing growth twins were observed in the fractured bimodal Cu tensile specimen. The underlying deformation mechanisms for grain refinement and detwinning were analyzed and discussed.
format	article
author	Liu Silu Zhao Yonghao
author_facet	Liu Silu Zhao Yonghao
author_sort	Liu Silu
title	Revealing grain coarsening and detwinning in bimodal Cu under tension
title_short	Revealing grain coarsening and detwinning in bimodal Cu under tension
title_full	Revealing grain coarsening and detwinning in bimodal Cu under tension
title_fullStr	Revealing grain coarsening and detwinning in bimodal Cu under tension
title_full_unstemmed	Revealing grain coarsening and detwinning in bimodal Cu under tension
title_sort	revealing grain coarsening and detwinning in bimodal cu under tension
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/fa6128f231b04287baeedd60689cc687
work_keys_str_mv	AT liusilu revealinggraincoarseninganddetwinninginbimodalcuundertension AT zhaoyonghao revealinggraincoarseninganddetwinninginbimodalcuundertension
_version_	1718371455042846720

Revealing grain coarsening and detwinning in bimodal Cu under tension

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