Strain weakening and superplasticity in a Bi-Sn eutectic alloy processed by high-pressure torsion
Strain weakening and superplasticity in a Bi-Sn eutectic alloy processed by high-pressure torsion
High-pressure torsion (HPT) was conducted on disks of a Bi-Sn eutectic alloy under a pressure of 6.0 GPa. The microstructural evolution was studied by scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD). Measurements of Vickers microhardness showed decreasing strength caused by strain weakening after HPT processing. Tensile testing was performed under initial strain rates from 10?4 to 10?2 s?1 at room temperature. The results demonstrate a much improved elongation to failure for the Bi-Sn alloy after HPT- processing. The Bi-Sn alloy processed through 10 turns gave an elongation to failure of more than 1200% at an initial strain rate of 10?4 s?1 at room temperature which is significantly larger than the elongation to failure of ~110% in the as-cast Bi-Sn alloy under the same tensile conditions
12107
Wang, Chuan Ting
80ad9adf-a9df-49ed-934d-fa64505b920d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
July 2014
Wang, Chuan Ting
80ad9adf-a9df-49ed-934d-fa64505b920d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Wang, Chuan Ting and Langdon, Terence G.
(2014)
Strain weakening and superplasticity in a Bi-Sn eutectic alloy processed by high-pressure torsion.
IOP Conference Series: Materials Science and Engineering, 63, .
(doi:10.1088/1757-899X/63/1/012107).
Abstract
High-pressure torsion (HPT) was conducted on disks of a Bi-Sn eutectic alloy under a pressure of 6.0 GPa. The microstructural evolution was studied by scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD). Measurements of Vickers microhardness showed decreasing strength caused by strain weakening after HPT processing. Tensile testing was performed under initial strain rates from 10?4 to 10?2 s?1 at room temperature. The results demonstrate a much improved elongation to failure for the Bi-Sn alloy after HPT- processing. The Bi-Sn alloy processed through 10 turns gave an elongation to failure of more than 1200% at an initial strain rate of 10?4 s?1 at room temperature which is significantly larger than the elongation to failure of ~110% in the as-cast Bi-Sn alloy under the same tensile conditions
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Published date: July 2014
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 368101
URI: http://eprints.soton.ac.uk/id/eprint/368101
ISSN: 1757-899X
PURE UUID: ab0ee403-6487-4d87-93f2-e586aa9832eb
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Date deposited: 12 Sep 2014 13:22
Last modified: 15 Mar 2024 03:13
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Chuan Ting Wang
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