Improving texture and microstructure homogeneity in high-purity ta sheets by warm cross rolling and annealing
Long, Doudou ; Liu, Shifeng ; Zhu, Jialin ; Liu, Yahui ; Zhou, Shiyuan ; Yuan, Xiaoli and Orlov, Dmytro LU
(2021)
In Metals
11(11).
- Abstract
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... (More)
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.
(Less)
- author
- Long, Doudou
; Liu, Shifeng
; Zhu, Jialin
; Liu, Yahui
; Zhou, Shiyuan
; Yuan, Xiaoli
and Orlov, Dmytro
LU
- organization
- publishing date
- 2021-11
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- 135 warm cross rolling, Dislocation movement, Geometrically necessary dislocation, Recrystallization, Schmid factor
- in
- Metals
- volume
- 11
- issue
- 11
- article number
- 1665
- publisher
- MDPI AG
- external identifiers
-
- scopus:85117271623
- ISSN
- 2075-4701
- DOI
- 10.3390/met11111665
- language
- English
- LU publication?
- yes
- additional info
- Funding Information: Acknowledgments: This research was funded by National Natural Science Foundation of China, grant number 51421001, Venture and Innovation Support Program for Chongqing Overseas Returnees, grant number 2020088, Chongqing Science and Technology Commission in China, grant number cstc2019jcyjmsxmX0132 and Major “Scientific and Technological Innovation 2025” Project of Ningbo, grant number 2018B10066. Funding Information: Funding: The present work was co-supported by the National Natural Science Foundation of China (grants 51421001 and 51701032), the Venture & Innovation Support Program for Chongqing Over-seas Returnees(cx2020088), the Chongqing Science and Technology Commission in China (Grant Overseas Returnees(cx2020088), the Chongqing Science and Technology Commission in China (Grant No.cstc2019jcyj-msxmX0132), and the Major “Scientific and Technological Innovation 2025” Project No.cstc2019jcyj-msxmX0132), and the Major “Scientific and Technological Innovation 2025” Project of Ningbo (No. 2018B10066). of Ningbo (No. 2018B10066). Data Availability Statement: The raw processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study. Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
- id
- 6a3d4f86-f15e-45cd-9e1c-8e8fa4efc353
- date added to LUP
- 2021-10-31 18:53:10
- date last changed
- 2022-04-27 05:21:39
@article{6a3d4f86-f15e-45cd-9e1c-8e8fa4efc353,
abstract = {{<p>The evolution of texture and microstructure uniformity in high-purity tantalum (Ta) sheets during 135<sup>◦</sup> 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.</p>}},
author = {{Long, Doudou and Liu, Shifeng and Zhu, Jialin and Liu, Yahui and Zhou, Shiyuan and Yuan, Xiaoli and Orlov, Dmytro}},
issn = {{2075-4701}},
keywords = {{135 warm cross rolling; Dislocation movement; Geometrically necessary dislocation; Recrystallization; Schmid factor}},
language = {{eng}},
number = {{11}},
publisher = {{MDPI AG}},
series = {{Metals}},
title = {{Improving texture and microstructure homogeneity in high-purity ta sheets by warm cross rolling and annealing}},
url = {{http://dx.doi.org/10.3390/met11111665}},
doi = {{10.3390/met11111665}},
volume = {{11}},
year = {{2021}},
}