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Microstructural modification of Sn–Bi and Sn–Bi–Al immiscible alloys by shearing
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Cassinath, Z., Li, Zushu, Sridhar, Seetharaman, Das, A. and Kotadia, Hiren (2019) Microstructural modification of Sn–Bi and Sn–Bi–Al immiscible alloys by shearing. Materials Science and Technology, 35 (18). pp. 2157-2164. doi:10.1080/02670836.2019.1661659
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WRAP-microstructural-modification-immiscible-alloys-shearing-Kotadia-2019.pdf - Accepted Version - Requires a PDF viewer. Download (998Kb) | Preview |
Official URL: http://dx.doi.org/10.1080/02670836.2019.1661659
Abstract
Sn–20 wt-%Bi and immiscible Sn–20 wt-%Bi–1 wt-%Al alloys were used to understand the effect of high-intensity shearing on microstructural refinement. Novel ACME (Axial Centrifugal Metal Expeller) shearing device, based on axial compressor and rotor–stator mechanism to generate high shear rate and intense turbulence, was used to condition the melts prior to solidification. Microstructure in the Sn–Bi alloy deviated from dendritic grains with coarse eutectic pockets under conventional solidification to compact grains with well-dispersed eutectic under semisolid-state shearing. Decreasing the shearing temperature and increasing shearing time increased the globularity of grains. Following shearing, remnant liquid solidified into fine grain structure. In the immiscible Sn–Bi–Al alloy, shearing produced uniform dispersion of refined Al-rich particles in Sn-rich matrix as opposed to severe segregation under conventional solidification. The primary effect of shearing appears to originate from the thermo-solutal homogenisation of the melt and its effect on interface stability during solidification.
| Item Type: | Journal Article | ||||||
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| Subjects: | Q Science > QC Physics Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) T Technology > TN Mining engineering. Metallurgy T Technology > TP Chemical technology |
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| Divisions: | Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) | ||||||
| Library of Congress Subject Headings (LCSH): | Solidification, Microstructure, Tin alloys | ||||||
| Journal or Publication Title: | Materials Science and Technology | ||||||
| Publisher: | Taylor and Francis | ||||||
| ISSN: | 0267-0836 | ||||||
| Official Date: | 17 September 2019 | ||||||
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| Volume: | 35 | ||||||
| Number: | 18 | ||||||
| Page Range: | pp. 2157-2164 | ||||||
| DOI: | 10.1080/02670836.2019.1661659 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Publisher Statement: | “This is an Accepted Manuscript of an article published by Taylor & Francis in Materials Science and Technology on 17/09/2019, available online: http://www.tandfonline.com/10.1080/02670836.2019.1661659 | ||||||
| Access rights to Published version: | Restricted or Subscription Access |
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