Characterization of complex planar faults in FeAl(B) alloys. (April 2017)

• Record Type: Journal Article
• Authors: Viguier, Bernard; Martinez, Mayerling; Lacaze, Jacques
• Is Part Of: Intermetallics. Volume 83(2017:Apr.)
• Page Start: 64
• Page End: 69
• Publication Date: 2017-04
• Subjects: Intermetallics (aluminides) -- Microalloying -- Dislocation geometry and arrangement -- Electron microscopy -- Transmission; Intermetallic compounds -- Metallography -- Periodicals; Metallic glasses -- Periodicals; Composés intermétalliques -- Métallographie -- Périodiques; 669.94
• DOI: 10.1016/j.intermet.2016.12.005
• Languages: English
• ISSNs: 0966-9795

Abstract

Abstract: Complex planar faults were observed by diffraction contrast transmission electron microscopy in a B2 FeAl based alloy containing Ni and B. The comparison of experimental images to simulated ones revealed the detailed structure of these faults that lie on {001} planes with both in-plane and out-of-plane components of the displacement vector. It was deduced that these defects form by segregation of (B-Al vacancies) complexes on a<100> dislocations, leading to various defect structures depending on the screw or edge character of the dislocation. Graphical abstract: Highlights: Complex planar faults are observed in a B-containing FeAl alloy with B2 structure. These were characterized by a comparison of experimental and simulated TEM images. The out of plane component of the defect is quantified. The defects form by segregation of B ona [100] dislocation and dissociation on{100} plane.