Electron microscopy observations of deformation twinning in a precipitation hardened copper-titanium alloy

Electron microscopy observations of deformation twins in a particle-hardened Cu-4.2 wt.% Ti alloy showed that twin growth occurs via the motion of so-called G-ledges on the twin interface and via colaescence of fine twins. The G-ledges exhibit a Burgers vector b sub t =1/6 < 112 > . Dislocatio...

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Bibliographic Details
Published in:Scripta materialia 1996-12, Vol.35 (12), p.1403-1409
Main Authors: Radetic, T., Radmilovic, V., Soffa, W.A.
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Deformation, plasticity, and creep
Exact sciences and technology
Materials science
Metals. Metallurgy
Physics
Treatment of materials and its effects on microstructure and properties
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Summary:Electron microscopy observations of deformation twins in a particle-hardened Cu-4.2 wt.% Ti alloy showed that twin growth occurs via the motion of so-called G-ledges on the twin interface and via colaescence of fine twins. The G-ledges exhibit a Burgers vector b sub t =1/6 < 112 > . Dislocations with an edge character (90 deg ) and mixed character (30 deg ) have been observed. In addition to the G-ledges, so-called C-ledges and pure ledges were observed. The Cu sub 4 Ti ( beta ') particles were not imaged in HREM because of the large extinction distance ( xi ) characterizing the D1 sub a ordered phase.
ISSN:1359-6462
1872-8456
DOI:10.1016/S1359-6462(96)00313-2