WORK-HARDENING AND RECOVERY RATES IN PURE ALUMINUM SINGLE CRYSTALS DURING HIGH-TEMPERATURE DEFORMATION.

Hideharu Nakashima, Nobuhiko Kawamura, Hiroaki Kurishita, Hideo Yoshinaga

Research output: Contribution to journalArticle

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Abstract

In order to clarify the contribution of grain boundary effect on the work-hardening rate without recovery effect, h, and the recovery rate without work-hardening effect, r, these two parameters in pure aluminum single crystals have been measured and compared with those in aluminum polycrystals reported so far. The measurement has been carried out by applying the strain-rate change technique to the steady-state tensile deformation at temperatures from 523 K to 673 K and at shear strain rates from 1. 2 multiplied by 10** minus **5 s** minus **1 to 4. 6 multiplied by 10** minus **1. It is found that h is approximately proportional to the inverse of stress and depends strongly on temperature. The stress exponent of r is about 3. The activation energy of r is about 2/3 of the activation energy of lattice self-diffusion in Al. These stress and temperature dependences of h and r are almost the same as those of the polycrystals. Therefore, it is concluded that the contribution of grain boundary effect to h and r is not large.

Original languageEnglish
Pages (from-to)441-448
Number of pages8
JournalNippon Kinzoku Gakkai-si
Volume50
Issue number5
Publication statusPublished - May 1986

Fingerprint

work hardening
Aluminum
Strain hardening
recovery
Polycrystals
Single crystals
aluminum
Recovery
Strain rate
single crystals
Grain boundaries
polycrystals
Activation energy
strain rate
grain boundaries
Shear strain
activation energy
tensile deformation
Temperature
shear strain

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

WORK-HARDENING AND RECOVERY RATES IN PURE ALUMINUM SINGLE CRYSTALS DURING HIGH-TEMPERATURE DEFORMATION. / Nakashima, Hideharu; Kawamura, Nobuhiko; Kurishita, Hiroaki; Yoshinaga, Hideo.

In: Nippon Kinzoku Gakkai-si, Vol. 50, No. 5, 05.1986, p. 441-448.

Research output: Contribution to journalArticle

Nakashima, Hideharu ; Kawamura, Nobuhiko ; Kurishita, Hiroaki ; Yoshinaga, Hideo. / WORK-HARDENING AND RECOVERY RATES IN PURE ALUMINUM SINGLE CRYSTALS DURING HIGH-TEMPERATURE DEFORMATION. In: Nippon Kinzoku Gakkai-si. 1986 ; Vol. 50, No. 5. pp. 441-448.
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abstract = "In order to clarify the contribution of grain boundary effect on the work-hardening rate without recovery effect, h, and the recovery rate without work-hardening effect, r, these two parameters in pure aluminum single crystals have been measured and compared with those in aluminum polycrystals reported so far. The measurement has been carried out by applying the strain-rate change technique to the steady-state tensile deformation at temperatures from 523 K to 673 K and at shear strain rates from 1. 2 multiplied by 10** minus **5 s** minus **1 to 4. 6 multiplied by 10** minus **1. It is found that h is approximately proportional to the inverse of stress and depends strongly on temperature. The stress exponent of r is about 3. The activation energy of r is about 2/3 of the activation energy of lattice self-diffusion in Al. These stress and temperature dependences of h and r are almost the same as those of the polycrystals. Therefore, it is concluded that the contribution of grain boundary effect to h and r is not large.",
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