Positive temperature dependence of yield stress in B2 FeAl

Kyosuke Yoshimi, S. Hanada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

28 Citations (Scopus)

Abstract

Single crystals of B2 Fe-39mol%Al without frozen-in vacancies were deformed in compression in the temperature range from room temperature to 1073K in order to investigate the temperature dependence of yield strength and the slip transition behavior. The positive temperature dependence of yield stress was found in this alloy. The peak temperature is not strongly dependent on compression axis, and is located at approximately 0.5Tm, where Tm is the melting point of Fe-39mol%Al alloy. In addition the slip transition from 〈111〉-type of 〈001〉-type occurs macroscopically around the peak temperature for all compression axes. Non-[111] slip is identified to operate slightly on (1̄01) plane even below the peak temperature by the two-surface trace analysis. Moreover it was observed that some of [111] dislocations decompose into [101] and [010] dislocations on (1̄01) plane at temperatures below the peak, suggesting that critical shear stress for [111] slip increases with increasing temperature. Thus it is clarified that the positive temperature dependence of yield stress is closely associated with the slip transition behavior.

Original languageEnglish
Title of host publicationProc First Int Symp Struct Intermet
EditorsR. Darolia, J.J. Lewandowski, C.T. Liu, P.L. Martin, D.B. Miracle, al et al
PublisherPubl by Minerals, Metals & Materials Soc (TMS)
Pages475-482
Number of pages8
ISBN (Print)0873392531
Publication statusPublished - 1993 Dec 1
EventProceedings of the First International Symposium on Structural Intermetallics - Champion, PA, USA
Duration: 1993 Sep 261993 Sep 30

Publication series

NameProc First Int Symp Struct Intermet

Other

OtherProceedings of the First International Symposium on Structural Intermetallics
CityChampion, PA, USA
Period93/9/2693/9/30

ASJC Scopus subject areas

  • Engineering(all)

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