A comparison of repetitive corrugation and straightening and high-pressure torsion using an Al-Mg-Sc alloy

Bhovi, PM and Patil, DC and Kori, SA and Venkateswarlu, K and Huang, Y and Langdon, TG (2016) A comparison of repetitive corrugation and straightening and high-pressure torsion using an Al-Mg-Sc alloy. Journal of Materials Research and Technology, 5 (4). pp. 353-359. ISSN 22387854

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Abstract

A comparative study was conducted to evaluate the influence of two different severe plastic deformation (SPD) processes: repetitive corrugation and straightening (RCS) and high-pressure torsion (HPT). Samples of an Al-3Mg-0.25Sc alloy with an initial grain size of ∼150 μm were processed by RCS through 8 passes at room temperature either without any rotation during processing or with a rotation of 90° around the longitudinal axis between each pass. Thin discs of the alloy were also processed for up to 5 turns by HPT at room temperature. The results show that both procedures introduce significant grain refinement with average grain sizes of ∼0.6–0.7 μm after RCS and ∼95 nm after HPT. Measurements of the Vickers microhardness gave values of ∼128 after RCS and ∼156 after HPT. The results demonstrate that processing by HPT is the optimum processing technique in achieving both high strength and microstructural homogeneity.

Item Type: Article
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
CHEMISTRY AND MATERIALS > Composite Materials
CHEMISTRY AND MATERIALS > Metals and Metallic Materials
CHEMISTRY AND MATERIALS > Nonmetallic Materials
Depositing User: Mrs SK Pratibha
Date Deposited: 28 Mar 2019 03:32
Last Modified: 28 Mar 2019 03:32
URI: http://nal-ir.nal.res.in/id/eprint/13061

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