### 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 language | English |
---|---|

Pages (from-to) | 441-448 |

Number of pages | 8 |

Journal | Nippon Kinzoku Gakkai-si |

Volume | 50 |

Issue number | 5 |

Publication status | Published - May 1986 |

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### All Science Journal Classification (ASJC) codes

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

### Cite this

*Nippon Kinzoku Gakkai-si*,

*50*(5), 441-448.

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

Research output: Contribution to journal › Article

*Nippon Kinzoku Gakkai-si*, vol. 50, no. 5, pp. 441-448.

}

TY - JOUR

T1 - WORK-HARDENING AND RECOVERY RATES IN PURE ALUMINUM SINGLE CRYSTALS DURING HIGH-TEMPERATURE DEFORMATION.

AU - Nakashima, Hideharu

AU - Kawamura, Nobuhiko

AU - Kurishita, Hiroaki

AU - Yoshinaga, Hideo

PY - 1986/5

Y1 - 1986/5

N2 - 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.

AB - 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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M3 - Article

VL - 50

SP - 441

EP - 448

JO - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals

JF - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals

SN - 0021-4876

IS - 5

ER -