Growth mechanism of extension twin variants during annealing of pure magnesium: An ‘ex situ’ electron backscattered diffraction investigation

Journal Article · Sat Apr 15 04:00:00 EDT 2017 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2017.02.008· OSTI ID:22689732

Sabat, R. K. ^[1]; Panda, D. ^[2]

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1. Department of Materials Engineering, IISc, Bangalore 560012 (India)
2. Department of Metallurgical & Materials Engineering, NIT, Rourkela 769008 (India)

Pure magnesium was subjected to plastic deformation through CSM (continuous stiffness measurement) indentation followed by annealing at 200 °C for 30 min. Nucleation of no new grains was observed neither at the twin–twin intersections nor at the multiple twin variants of a grain after annealing. Significant growth of off-basal twin orientation compared to basal twin orientation was observed in the sample after annealing and is attributed to the partial coherent nature of twin boundary in the later case. Further, growth of twins was independent of the strain distribution between parent and twinned grains. - Highlights: • An ‘ex situ’ EBSD of pure Mg during annealing was investigated. • Nucleation of no new grains was observed. • Significant growth of off-basal twin orientation was observed. • Growth of twins may be attributed to the partial coherent nature of twin boundary.

• OSTI ID: 22689732
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Vol. 126; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
BACKSCATTERING
CRYSTAL GROWTH
DISTRIBUTION
ELECTRON DIFFRACTION
FLEXIBILITY
MAGNESIUM
PLASTICITY
STRAINS
TEMPERATURE RANGE 0400-1000 K
TWINNING