Mobility of edge dislocations in Al-Mg solution hardened alloys at high temperatures

Hideharu Nakashima, Hideo Yoshinaga

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

For the high-temperature deformation of Al-Mg alloys, the dislocation densities which were obtained by the stress change and stress relaxation tests using the theoretical edge dislocation-mobility of Cottrell, were about 10 times as large as the densities measured by transmission electron microscopy. The mobility of edge dislocations dragging solute-atmospheres was re-evaluated by assuming that the interaction energy between edge dislocation and solute atom is relaxed with increase in solute concentration. The obtained results are summarized as follows. (1) The re-evaluated mobility in an Al-5.0 mol%Mg alloy, for example, is about 5 times as large as Cottrell's mobility. (2) The mobility tends to saturate with increase in the solute concentration. The dislocation densities obtained in Al-Mg alloys by the stress change and stress relaxation tests were re-estimated using the re-evaluated mobility. It was found that the re-estimated dislocation densities agree approximately with the densities obtained by transmission electron microscopy.

Original languageEnglish
Pages (from-to)254-261
Number of pages8
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume56
Issue number3
DOIs
Publication statusPublished - Jan 1 1992

Fingerprint

Edge dislocations
edge dislocations
Stress relaxation
solutes
Transmission electron microscopy
stress relaxation
Temperature
Atoms
transmission electron microscopy
atmospheres
atoms

All Science Journal Classification (ASJC) codes

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

Cite this

Mobility of edge dislocations in Al-Mg solution hardened alloys at high temperatures. / Nakashima, Hideharu; Yoshinaga, Hideo.

In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 56, No. 3, 01.01.1992, p. 254-261.

Research output: Contribution to journalArticle

@article{6ba63a5d70894c4794dc4806c5c3877f,
title = "Mobility of edge dislocations in Al-Mg solution hardened alloys at high temperatures",
abstract = "For the high-temperature deformation of Al-Mg alloys, the dislocation densities which were obtained by the stress change and stress relaxation tests using the theoretical edge dislocation-mobility of Cottrell, were about 10 times as large as the densities measured by transmission electron microscopy. The mobility of edge dislocations dragging solute-atmospheres was re-evaluated by assuming that the interaction energy between edge dislocation and solute atom is relaxed with increase in solute concentration. The obtained results are summarized as follows. (1) The re-evaluated mobility in an Al-5.0 mol{\%}Mg alloy, for example, is about 5 times as large as Cottrell's mobility. (2) The mobility tends to saturate with increase in the solute concentration. The dislocation densities obtained in Al-Mg alloys by the stress change and stress relaxation tests were re-estimated using the re-evaluated mobility. It was found that the re-estimated dislocation densities agree approximately with the densities obtained by transmission electron microscopy.",
author = "Hideharu Nakashima and Hideo Yoshinaga",
year = "1992",
month = "1",
day = "1",
doi = "10.2320/jinstmet1952.56.3_254",
language = "English",
volume = "56",
pages = "254--261",
journal = "Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals",
issn = "0021-4876",
publisher = "公益社団法人 日本金属学会",
number = "3",

}

TY - JOUR

T1 - Mobility of edge dislocations in Al-Mg solution hardened alloys at high temperatures

AU - Nakashima, Hideharu

AU - Yoshinaga, Hideo

PY - 1992/1/1

Y1 - 1992/1/1

N2 - For the high-temperature deformation of Al-Mg alloys, the dislocation densities which were obtained by the stress change and stress relaxation tests using the theoretical edge dislocation-mobility of Cottrell, were about 10 times as large as the densities measured by transmission electron microscopy. The mobility of edge dislocations dragging solute-atmospheres was re-evaluated by assuming that the interaction energy between edge dislocation and solute atom is relaxed with increase in solute concentration. The obtained results are summarized as follows. (1) The re-evaluated mobility in an Al-5.0 mol%Mg alloy, for example, is about 5 times as large as Cottrell's mobility. (2) The mobility tends to saturate with increase in the solute concentration. The dislocation densities obtained in Al-Mg alloys by the stress change and stress relaxation tests were re-estimated using the re-evaluated mobility. It was found that the re-estimated dislocation densities agree approximately with the densities obtained by transmission electron microscopy.

AB - For the high-temperature deformation of Al-Mg alloys, the dislocation densities which were obtained by the stress change and stress relaxation tests using the theoretical edge dislocation-mobility of Cottrell, were about 10 times as large as the densities measured by transmission electron microscopy. The mobility of edge dislocations dragging solute-atmospheres was re-evaluated by assuming that the interaction energy between edge dislocation and solute atom is relaxed with increase in solute concentration. The obtained results are summarized as follows. (1) The re-evaluated mobility in an Al-5.0 mol%Mg alloy, for example, is about 5 times as large as Cottrell's mobility. (2) The mobility tends to saturate with increase in the solute concentration. The dislocation densities obtained in Al-Mg alloys by the stress change and stress relaxation tests were re-estimated using the re-evaluated mobility. It was found that the re-estimated dislocation densities agree approximately with the densities obtained by transmission electron microscopy.

UR - http://www.scopus.com/inward/record.url?scp=0026834259&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026834259&partnerID=8YFLogxK

U2 - 10.2320/jinstmet1952.56.3_254

DO - 10.2320/jinstmet1952.56.3_254

M3 - Article

AN - SCOPUS:0026834259

VL - 56

SP - 254

EP - 261

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 - 3

ER -