Dislocation density and interaction between dislocations in Al-Mg solution hardened alloys deformed at high temperatures

Hiroyuki Hayakawa, Hideharu Nakashima, Hideo Yoshinaga

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

In order to clarify the origin of internal stress in solution-hardened alloys being deformed at high temperatures, the dislocation density and structure were determined by TEM using Al-Mg alloys with 3, 4 and 5 at% Mg crept into the steady state. The internal stress was evaluated by the stress change test. The creep test was carried out from 573 to 723 K and stresses from 4.4 to 70 MPa. Many attractive junctions are formed by dislocations on different slip planes and a relation holds between the internal stress, and dislocation density. It is concluded that the main origin of internal stress is the athermal stress needed for breaking the junctions.

Original languageEnglish
Pages (from-to)1113-1122
Number of pages10
JournalNippon Kinzoku Gakkai-si
Volume53
Issue number11
Publication statusPublished - Nov 1 1989

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residual stress
Residual stresses
Creep
interactions
creep tests
Temperature
slip
Transmission electron microscopy
transmission electron microscopy

All Science Journal Classification (ASJC) codes

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

Cite this

Dislocation density and interaction between dislocations in Al-Mg solution hardened alloys deformed at high temperatures. / Hayakawa, Hiroyuki; Nakashima, Hideharu; Yoshinaga, Hideo.

In: Nippon Kinzoku Gakkai-si, Vol. 53, No. 11, 01.11.1989, p. 1113-1122.

Research output: Contribution to journalArticle

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