Formation of annealing twins in f.c.c. crystals

Journal Article · Sun Jun 01 00:00:00 EDT 1997 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(96)00336-9· OSTI ID:514672

Mahajan, S ^[1]; Pande, C S; Imam, M A; Rath, B B ^[2]

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1. Carnegie Mellon Univ., Pittsburgh, PA (United States). Dept. of Materials Science and Engineering
2. Naval Research Lab., Washington, DC (United States)

A microscopic model for the formation of annealing twins in f.c.c. crystals is proposed. It is argued that Shockley partial loops nucleate on consecutive {l_brace}111{r_brace} planes by growth accidents occurring on migrating {l_brace}111{r_brace} steps associated with a moving grain boundary. The higher the velocity of the boundary, the higher the twin density. The absence of twins in high stacking fault energy materials and the influence of temperature on twin density has been developed by examining the influence of deformation damage on the incidence of twinning in copper and the effect of boron in reducing twin density in annealed nickel.

• OSTI ID: 514672
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 6 Vol. 45; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
BORON
COPPER
FCC LATTICES
MATHEMATICAL MODELS
METALLURGICAL EFFECTS
METALS
NICKEL
TWINNING