Improving Texture and Microstructure Homogeneity in High-Purity Ta Sheets by Warm Cross Rolling and Annealing

The evolution of texture and microstructure uniformity in high-purity tantalum (Ta) sheets during 135° warm cross rolling (WCR) was analyzed in detail. X-ray diffraction suggested that relatively uniform ‘ideal’ deformation texture distribution across the thickness could be obtained from WCR, since...

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Autores principales:	Doudou Long, Shifeng Liu, Jialin Zhu, Yahui Liu, Shiyuan Zhou, Xiaoli Yuan, Dmytro Orlov
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	135° warm cross rolling dislocation movement geometrically necessary dislocation schmid factor recrystallization Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/4dc505bd259d491aa351c294234de486
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spelling	oai:doaj.org-article:4dc505bd259d491aa351c294234de4862021-11-25T18:21:03ZImproving Texture and Microstructure Homogeneity in High-Purity Ta Sheets by Warm Cross Rolling and Annealing10.3390/met111116652075-4701https://doaj.org/article/4dc505bd259d491aa351c294234de4862021-10-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1665https://doaj.org/toc/2075-4701The evolution of texture and microstructure uniformity in high-purity tantalum (Ta) sheets during 135° warm cross rolling (WCR) was analyzed in detail. X-ray diffraction suggested that relatively uniform ‘ideal’ deformation texture distribution across the thickness could be obtained from WCR, since more potential slip systems could be activated. Electron backscatter diffraction (EBSD) results indicated that the change in strain path in warm rolling could enhance dislocations mobility and increase the probability of dislocations rearrangement and annihilation. Thus, the proportion of low-angle grain boundaries was significantly reduced, and more sub-grain boundaries or sub-grains were formed via WCR. The calculation of geometrically necessary dislocation density based on the strain gradient model supports this result. The analysis of relative Schmid factor combined with the strain contouring map indicated that inhomogeneous orientation-dependent grain subdivision could be effectively weakened, and relatively uniform strain distribution could be formed in the WCR sample. Upon annealing, uniform fine grain size and more randomly oriented grains were obtained in the WCR sample after the completion of recrystallization because of relatively uniform grain subdivision and stored energy distribution.Doudou LongShifeng LiuJialin ZhuYahui LiuShiyuan ZhouXiaoli YuanDmytro OrlovMDPI AGarticle135° warm cross rollingdislocation movementgeometrically necessary dislocationschmid factorrecrystallizationMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1665, p 1665 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	135° warm cross rolling dislocation movement geometrically necessary dislocation schmid factor recrystallization Mining engineering. Metallurgy TN1-997
spellingShingle	135° warm cross rolling dislocation movement geometrically necessary dislocation schmid factor recrystallization Mining engineering. Metallurgy TN1-997 Doudou Long Shifeng Liu Jialin Zhu Yahui Liu Shiyuan Zhou Xiaoli Yuan Dmytro Orlov Improving Texture and Microstructure Homogeneity in High-Purity Ta Sheets by Warm Cross Rolling and Annealing
description	The evolution of texture and microstructure uniformity in high-purity tantalum (Ta) sheets during 135° warm cross rolling (WCR) was analyzed in detail. X-ray diffraction suggested that relatively uniform ‘ideal’ deformation texture distribution across the thickness could be obtained from WCR, since more potential slip systems could be activated. Electron backscatter diffraction (EBSD) results indicated that the change in strain path in warm rolling could enhance dislocations mobility and increase the probability of dislocations rearrangement and annihilation. Thus, the proportion of low-angle grain boundaries was significantly reduced, and more sub-grain boundaries or sub-grains were formed via WCR. The calculation of geometrically necessary dislocation density based on the strain gradient model supports this result. The analysis of relative Schmid factor combined with the strain contouring map indicated that inhomogeneous orientation-dependent grain subdivision could be effectively weakened, and relatively uniform strain distribution could be formed in the WCR sample. Upon annealing, uniform fine grain size and more randomly oriented grains were obtained in the WCR sample after the completion of recrystallization because of relatively uniform grain subdivision and stored energy distribution.
format	article
author	Doudou Long Shifeng Liu Jialin Zhu Yahui Liu Shiyuan Zhou Xiaoli Yuan Dmytro Orlov
author_facet	Doudou Long Shifeng Liu Jialin Zhu Yahui Liu Shiyuan Zhou Xiaoli Yuan Dmytro Orlov
author_sort	Doudou Long
title	Improving Texture and Microstructure Homogeneity in High-Purity Ta Sheets by Warm Cross Rolling and Annealing
title_short	Improving Texture and Microstructure Homogeneity in High-Purity Ta Sheets by Warm Cross Rolling and Annealing
title_full	Improving Texture and Microstructure Homogeneity in High-Purity Ta Sheets by Warm Cross Rolling and Annealing
title_fullStr	Improving Texture and Microstructure Homogeneity in High-Purity Ta Sheets by Warm Cross Rolling and Annealing
title_full_unstemmed	Improving Texture and Microstructure Homogeneity in High-Purity Ta Sheets by Warm Cross Rolling and Annealing
title_sort	improving texture and microstructure homogeneity in high-purity ta sheets by warm cross rolling and annealing
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4dc505bd259d491aa351c294234de486
work_keys_str_mv	AT doudoulong improvingtextureandmicrostructurehomogeneityinhighpuritytasheetsbywarmcrossrollingandannealing AT shifengliu improvingtextureandmicrostructurehomogeneityinhighpuritytasheetsbywarmcrossrollingandannealing AT jialinzhu improvingtextureandmicrostructurehomogeneityinhighpuritytasheetsbywarmcrossrollingandannealing AT yahuiliu improvingtextureandmicrostructurehomogeneityinhighpuritytasheetsbywarmcrossrollingandannealing AT shiyuanzhou improvingtextureandmicrostructurehomogeneityinhighpuritytasheetsbywarmcrossrollingandannealing AT xiaoliyuan improvingtextureandmicrostructurehomogeneityinhighpuritytasheetsbywarmcrossrollingandannealing AT dmytroorlov improvingtextureandmicrostructurehomogeneityinhighpuritytasheetsbywarmcrossrollingandannealing
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Improving Texture and Microstructure Homogeneity in High-Purity Ta Sheets by Warm Cross Rolling and Annealing

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