Absence of Threshold Stress for High-Temperature Creep of Dispersion- and Solution-Hardened Al-3.1 at% Mg-1.3 vol% be Alloy

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

研究成果: ジャーナルへの寄稿記事

1 引用 (Scopus)

抄録

In order to examine the Srolovitz's theory of attractive interaction between dislocations and dispersed particles, an Al-3.1 at% Mg-1.3 vol% Be alloy having a combined effect of dispersion- and solution-hardenings was subjected to creep tests and transmission electron microscopic observation. The creep test was conducted at temperatures from 623 to 723 K and at stresses from 1.8 to 51.4 MPa which correspond to the range of 0.34-7.64σvv is the void hardening stress). The results show that the dislocation-particle interaction is attractive, but no clear threshold stress is observed under the conditions tested. This suggests that the absence of threshold stress should have no bearing on the climb mechanism. The reason for the absence of threshold stress in this alloy is discussed from viewpoints of solution hardening and grain boundary sliding.

元の言語英語
ページ(範囲)778-785
ページ数8
ジャーナルMaterials Transactions, JIM
31
発行部数9
DOI
出版物ステータス出版済み - 1 1 1990

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Creep
thresholds
hardening
Hardening
creep tests
Bearings (structural)
Temperature
Grain boundary sliding
Particle interactions
particle interactions
sliding
voids
grain boundaries
Electrons
electrons
interactions
temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

これを引用

Absence of Threshold Stress for High-Temperature Creep of Dispersion- and Solution-Hardened Al-3.1 at% Mg-1.3 vol% be Alloy. / Yeh, Ying Hwa; Miyachi, Masakazu; Miyachi, Masakazu; Nakashima, Hideharu; Yoshinaga, Hideo; Kurishita, Hiroaki; Goto, Shoji; Goto, Shoji; Goto, Shoji.

:: Materials Transactions, JIM, 巻 31, 番号 9, 01.01.1990, p. 778-785.

研究成果: ジャーナルへの寄稿記事

Yeh, Ying Hwa ; Miyachi, Masakazu ; Miyachi, Masakazu ; Nakashima, Hideharu ; Yoshinaga, Hideo ; Kurishita, Hiroaki ; Goto, Shoji ; Goto, Shoji ; Goto, Shoji. / Absence of Threshold Stress for High-Temperature Creep of Dispersion- and Solution-Hardened Al-3.1 at% Mg-1.3 vol% be Alloy. :: Materials Transactions, JIM. 1990 ; 巻 31, 番号 9. pp. 778-785.
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abstract = "In order to examine the Srolovitz's theory of attractive interaction between dislocations and dispersed particles, an Al-3.1 at{\%} Mg-1.3 vol{\%} Be alloy having a combined effect of dispersion- and solution-hardenings was subjected to creep tests and transmission electron microscopic observation. The creep test was conducted at temperatures from 623 to 723 K and at stresses from 1.8 to 51.4 MPa which correspond to the range of 0.34-7.64σv (σv is the void hardening stress). The results show that the dislocation-particle interaction is attractive, but no clear threshold stress is observed under the conditions tested. This suggests that the absence of threshold stress should have no bearing on the climb mechanism. The reason for the absence of threshold stress in this alloy is discussed from viewpoints of solution hardening and grain boundary sliding.",
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AU - Miyachi, Masakazu

AU - Nakashima, Hideharu

AU - Yoshinaga, Hideo

AU - Kurishita, Hiroaki

AU - Goto, Shoji

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AU - Goto, Shoji

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AB - In order to examine the Srolovitz's theory of attractive interaction between dislocations and dispersed particles, an Al-3.1 at% Mg-1.3 vol% Be alloy having a combined effect of dispersion- and solution-hardenings was subjected to creep tests and transmission electron microscopic observation. The creep test was conducted at temperatures from 623 to 723 K and at stresses from 1.8 to 51.4 MPa which correspond to the range of 0.34-7.64σv (σv is the void hardening stress). The results show that the dislocation-particle interaction is attractive, but no clear threshold stress is observed under the conditions tested. This suggests that the absence of threshold stress should have no bearing on the climb mechanism. The reason for the absence of threshold stress in this alloy is discussed from viewpoints of solution hardening and grain boundary sliding.

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