Antiphase domain boundary tubes in plastically deformed Fe-Al alloys with B2 ordered structure

Journal Article · Mon Dec 01 04:00:00 EST 1997 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(97)00328-X· OSTI ID:556490

Song, Z Y; Hida, Moritaka; Sakakibara, Akira; Takemoto, Yoshito ^[1]

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1. Okayama Univ. (Japan). Dept. of Mechanics

Fe-Al alloys with 25 to 50 at%Al, typical B2 long-range ordered alloys, are interesting because stacking faults, which had been considered not to exist in body-centered cubic materials, were observed in some of them like Fe-35 at%Al B2 alloys. The formation of the stacking faults was suggested to be due to the vacancy agglomeration under the shear stress induced by the quenching. The purpose of the present paper is to describe the observation of antiphase domain boundary (APB) tubes in several alloys with different compositions by the method of transmission electron microscopy (TEM), and to reveal how the probability of observing the APB tubes varies with the Al concentration of the alloys. Up to date, the APB tubes have only been observed by means of TEM, and the formation model of cross-slip and annihilation cannot explain the high density of the tubes shown in the TEM images. The present paper also discusses the APB tubes as being a result of the film effect of the TEM specimens.

• OSTI ID: 556490
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 11 Vol. 37; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CHEMICAL COMPOSITION
DEFORMATION
DISLOCATIONS
INTERMETALLIC COMPOUNDS
IRON ALLOYS
MICROSTRUCTURE
STACKING FAULTS
VACANCIES