High-temperature creep behavior of a dispersion- and solution-hardened At-3.1at%Mg-1.3vol%Be alloy - absence of threshold stress

Ying Hwa Yeh, Masakazu Miyachi, Hideharu Nakashima, Hiroaki Kurishita, Shoji Goto, Hideo Yoshinaga

研究成果: ジャーナルへの寄稿記事

抄録

In order to examine D.J. Srolovitz's theory of attractive interaction between dislocations and dispersed particles, an Al-3.1 at% Mg-1.3 vol% Be alloy having effects of dispersion and solution hardening was subjected to creep tests and transmission electron microscopic observation. The creep test was conducted from 623 to 723 K at stresses from 1.8 to 51.4 MPa, which correspond to the range of 0.38-8.48σvv is the void hardening stress). The results show that the dislocation-particle interaction is attractive, but no clear threshold stress occurs under the conditions tested. This suggests that the absence of threshold stress may not be evidence of the climb mechanism. The reason for the absence of threshold stress is discussed from the viewpoints of solution hardening and grain boundary sliding.

元の言語英語
ページ(範囲)296-302
ページ数7
ジャーナルNippon Kinzoku Gakkai-si
53
発行部数3
出版物ステータス出版済み - 3 1 1989

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Creep
thresholds
hardening
Hardening
creep tests
Temperature
Grain boundary sliding
Particle interactions
particle interactions
sliding
voids
grain boundaries
Electrons
electrons
interactions

All Science Journal Classification (ASJC) codes

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

これを引用

High-temperature creep behavior of a dispersion- and solution-hardened At-3.1at%Mg-1.3vol%Be alloy - absence of threshold stress. / Yeh, Ying Hwa; Miyachi, Masakazu; Nakashima, Hideharu; Kurishita, Hiroaki; Goto, Shoji; Yoshinaga, Hideo.

:: Nippon Kinzoku Gakkai-si, 巻 53, 番号 3, 01.03.1989, p. 296-302.

研究成果: ジャーナルへの寄稿記事

Yeh, Ying Hwa ; Miyachi, Masakazu ; Nakashima, Hideharu ; Kurishita, Hiroaki ; Goto, Shoji ; Yoshinaga, Hideo. / High-temperature creep behavior of a dispersion- and solution-hardened At-3.1at%Mg-1.3vol%Be alloy - absence of threshold stress. :: Nippon Kinzoku Gakkai-si. 1989 ; 巻 53, 番号 3. pp. 296-302.
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abstract = "In order to examine D.J. Srolovitz's theory of attractive interaction between dislocations and dispersed particles, an Al-3.1 at{\%} Mg-1.3 vol{\%} Be alloy having effects of dispersion and solution hardening was subjected to creep tests and transmission electron microscopic observation. The creep test was conducted from 623 to 723 K at stresses from 1.8 to 51.4 MPa, which correspond to the range of 0.38-8.48σv (σv is the void hardening stress). The results show that the dislocation-particle interaction is attractive, but no clear threshold stress occurs under the conditions tested. This suggests that the absence of threshold stress may not be evidence of the climb mechanism. The reason for the absence of threshold stress is discussed from the viewpoints of solution hardening and grain boundary sliding.",
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