Using ring samples to evaluate the processing characteristics in high-pressure torsion

Yosuke Harai; Kaveh Edalati; Zenji Horita; Terence G. Langdon

doi:10.1016/j.actamat.2008.10.046

Using ring samples to evaluate the processing characteristics in high-pressure torsion

Yosuke Harai, Kaveh Edalati, Zenji Horita, Terence G. Langdon

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Abstract

An Al-3% Mg-0.2% Sc alloy was processed by high-pressure torsion (HPT) using samples in the form of solid disks and rings. Following HPT, all values of the measured Vickers microhardness fall onto a single curve when plotted against the equivalent strain, such that there are increasing values of hardness at the lower strains and hardness saturation above equivalent strains of ∼40. This saturation level is independent of the number of revolutions and the applied pressure. The grain size following HPT is ∼220 nm, and tensile tests show that the material is superplastic at a testing temperature of 573 K.

Original language	English
Pages (from-to)	1147-1153
Number of pages	7
Journal	Acta Materialia
Volume	57
Issue number	4
DOIs	https://doi.org/10.1016/j.actamat.2008.10.046
Publication status	Published - Feb 2009

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

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10.1016/j.actamat.2008.10.046

Cite this

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title = "Using ring samples to evaluate the processing characteristics in high-pressure torsion",

abstract = "An Al-3% Mg-0.2% Sc alloy was processed by high-pressure torsion (HPT) using samples in the form of solid disks and rings. Following HPT, all values of the measured Vickers microhardness fall onto a single curve when plotted against the equivalent strain, such that there are increasing values of hardness at the lower strains and hardness saturation above equivalent strains of ∼40. This saturation level is independent of the number of revolutions and the applied pressure. The grain size following HPT is ∼220 nm, and tensile tests show that the material is superplastic at a testing temperature of 573 K.",

author = "Yosuke Harai and Kaveh Edalati and Zenji Horita and Langdon, {Terence G.}",

note = "Funding Information: One of the authors (K.E.) thanks the Islamic Development Bank for a scholarship. This work was supported in part by the Light Metals Educational Foundation of Japan, in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan in the Priority Area “Giant Straining Process for Advanced Materials Containing Ultra-High Density Lattice Defects” and in part by the National Science Foundation of the United States under Grant No. DMR-0243331.",

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volume = "57",

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AU - Harai, Yosuke

AU - Edalati, Kaveh

AU - Horita, Zenji

AU - Langdon, Terence G.

N1 - Funding Information: One of the authors (K.E.) thanks the Islamic Development Bank for a scholarship. This work was supported in part by the Light Metals Educational Foundation of Japan, in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan in the Priority Area “Giant Straining Process for Advanced Materials Containing Ultra-High Density Lattice Defects” and in part by the National Science Foundation of the United States under Grant No. DMR-0243331.

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N2 - An Al-3% Mg-0.2% Sc alloy was processed by high-pressure torsion (HPT) using samples in the form of solid disks and rings. Following HPT, all values of the measured Vickers microhardness fall onto a single curve when plotted against the equivalent strain, such that there are increasing values of hardness at the lower strains and hardness saturation above equivalent strains of ∼40. This saturation level is independent of the number of revolutions and the applied pressure. The grain size following HPT is ∼220 nm, and tensile tests show that the material is superplastic at a testing temperature of 573 K.

AB - An Al-3% Mg-0.2% Sc alloy was processed by high-pressure torsion (HPT) using samples in the form of solid disks and rings. Following HPT, all values of the measured Vickers microhardness fall onto a single curve when plotted against the equivalent strain, such that there are increasing values of hardness at the lower strains and hardness saturation above equivalent strains of ∼40. This saturation level is independent of the number of revolutions and the applied pressure. The grain size following HPT is ∼220 nm, and tensile tests show that the material is superplastic at a testing temperature of 573 K.

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Using ring samples to evaluate the processing characteristics in high-pressure torsion

Abstract

All Science Journal Classification (ASJC) codes

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