An overview of flow patterns development on disc lower surfaces when processing by high-pressure torsion
Stainless steel was selected to study the flow patterns developed with anvil misalignments of 100, 200 and 300 μm on the disc lower surfaces during processing by high-pressure torsion (HPT) through totals of up to 16 turns. A pair of anvils having a roughness of Ra ≈ 15 μm was utilized to investigat...
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2014-10-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785414000520 |
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doaj-44d031f824cf48ffa9e6cca63f5ccc232020-11-25T03:21:27ZengElsevierJournal of Materials Research and Technology2238-78542014-10-013430331010.1016/j.jmrt.2014.06.005An overview of flow patterns development on disc lower surfaces when processing by high-pressure torsionYi Huang0Ahmed Al-Zubaydi1Megumi Kawasaki2Terence G. Langdon3Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton, United KingdomMaterials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton, United KingdomDivision of Materials Science and Engineering, Hanyang University, Seoul, South KoreaMaterials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton, United KingdomStainless steel was selected to study the flow patterns developed with anvil misalignments of 100, 200 and 300 μm on the disc lower surfaces during processing by high-pressure torsion (HPT) through totals of up to 16 turns. A pair of anvils having a roughness of Ra ≈ 15 μm was utilized to investigate the flow pattern development. Discs subjected to only compression in HPT exhibit similar characteristics to the as-received material in the phase domains and there were no overall curvatures of the austenitic (γ) and ferritic (α) phases. Double-swirl flow patterns were not observed in the 1 turn sample but they appeared on the disc lower surfaces after 5 and 16 turns with all three-anvil alignment conditions. There was no significant difference in the double-swirl configuration size for the 5 and 16 turns samples with different amounts of anvil misalignments. These results have important implications for processing metals by HPT.http://www.sciencedirect.com/science/article/pii/S2238785414000520Double-swirlFlow patternHigh-pressure torsionStainless steel |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Yi Huang Ahmed Al-Zubaydi Megumi Kawasaki Terence G. Langdon |
| spellingShingle |
Yi Huang Ahmed Al-Zubaydi Megumi Kawasaki Terence G. Langdon An overview of flow patterns development on disc lower surfaces when processing by high-pressure torsion Journal of Materials Research and Technology Double-swirl Flow pattern High-pressure torsion Stainless steel |
| author_facet |
Yi Huang Ahmed Al-Zubaydi Megumi Kawasaki Terence G. Langdon |
| author_sort |
Yi Huang |
| title |
An overview of flow patterns development on disc lower surfaces when processing by high-pressure torsion |
| title_short |
An overview of flow patterns development on disc lower surfaces when processing by high-pressure torsion |
| title_full |
An overview of flow patterns development on disc lower surfaces when processing by high-pressure torsion |
| title_fullStr |
An overview of flow patterns development on disc lower surfaces when processing by high-pressure torsion |
| title_full_unstemmed |
An overview of flow patterns development on disc lower surfaces when processing by high-pressure torsion |
| title_sort |
overview of flow patterns development on disc lower surfaces when processing by high-pressure torsion |
| publisher |
Elsevier |
| series |
Journal of Materials Research and Technology |
| issn |
2238-7854 |
| publishDate |
2014-10-01 |
| description |
Stainless steel was selected to study the flow patterns developed with anvil misalignments of 100, 200 and 300 μm on the disc lower surfaces during processing by high-pressure torsion (HPT) through totals of up to 16 turns. A pair of anvils having a roughness of Ra ≈ 15 μm was utilized to investigate the flow pattern development. Discs subjected to only compression in HPT exhibit similar characteristics to the as-received material in the phase domains and there were no overall curvatures of the austenitic (γ) and ferritic (α) phases. Double-swirl flow patterns were not observed in the 1 turn sample but they appeared on the disc lower surfaces after 5 and 16 turns with all three-anvil alignment conditions. There was no significant difference in the double-swirl configuration size for the 5 and 16 turns samples with different amounts of anvil misalignments. These results have important implications for processing metals by HPT. |
| topic |
Double-swirl Flow pattern High-pressure torsion Stainless steel |
| url |
http://www.sciencedirect.com/science/article/pii/S2238785414000520 |
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