Low-Temperature and high-Strain-Rate superplasticity of ultrafine-Grained A7075 processed by high-Pressure torsion

Seungwon Lee, Katsumi Watanabe, Kenji Matsuda, Zenji Horita

Research output: Contribution to journalArticle

Abstract

An A7075 alloy was processed by high-pressure torsion (HPT) under an applied pressure of 6 GPa for 1, 3 and 5 revolutions with a rotation speed of 1 rpm at room temperature. Vickers microhardness saturated to a level of 220 Hv after the HPT processing and the grain size was refined to 3 120 nm at the state of the hardness saturation. Tensile tests were conducted with initial strain rates from 2.0

Original languageEnglish
Pages (from-to)1341-1347
Number of pages7
JournalMaterials Transactions
Volume59
Issue number8
DOIs
Publication statusPublished - Jan 1 2018

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superplasticity
Superplasticity
Torsional stress
strain rate
torsion
Strain rate
tensile tests
microhardness
hardness
grain size
saturation
Microhardness
Temperature
room temperature
Hardness
Processing
Ultrafine

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Low-Temperature and high-Strain-Rate superplasticity of ultrafine-Grained A7075 processed by high-Pressure torsion. / Lee, Seungwon; Watanabe, Katsumi; Matsuda, Kenji; Horita, Zenji.

In: Materials Transactions, Vol. 59, No. 8, 01.01.2018, p. 1341-1347.

Research output: Contribution to journalArticle

Lee, Seungwon ; Watanabe, Katsumi ; Matsuda, Kenji ; Horita, Zenji. / Low-Temperature and high-Strain-Rate superplasticity of ultrafine-Grained A7075 processed by high-Pressure torsion. In: Materials Transactions. 2018 ; Vol. 59, No. 8. pp. 1341-1347.
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