Development of the Microstructure of a Severely Plastically Deformed Mg Alloy, ZK60

Journal Article · Sun Jan 01 04:00:00 EST 2006 · Advances in X-Ray Analysis

OSTI ID:978048

Stoica, G. M. ^[1]; Payzant, E Andrew ^[2]; Wu, J. ^[1]; Liao, J. ^[1]; Spruiell, J. E. ^[1]; Liaw, Peter K ^[1]

---

1. University of Tennessee, Knoxville (UTK)
2. ORNL

The microstructural evolutions of a Mg alloy, ZK60, subjected to plastic deformation through equal-channel-angular processing (ECAP) and uniaxial compression were compared using X-ray diffraction (XRD) for both 2 -scans and pole-figure measurements to better understand their specific deformation modes. A larger microstrain was observed in the samples deformed by compression at room temperature, as compared to the samples ECAP-ed at 260C. Crystallographic texture changes due to uniaxial compression suggested a twinning deformation contribution. The texture evolution during ECAP was mapped on a partially processed sample, at locations with different shear-strain values. Microstrain relaxation in ECAP-ed samples indicates that the recovery/ recrystallization processes compete with the plastic deformation, which was supported by texture features observed in a late stage of the ECAP deformation.

• Research Organization: Oak Ridge National Laboratory (ORNL); High Temperature Materials Laboratory
• Sponsoring Organization: EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 978048
• Journal Information: Advances in X-Ray Analysis, Journal Name: Advances in X-Ray Analysis Vol. 49; ISSN AXRAAA; ISSN 0376-0308
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPRESSION
DEFORMATION
ECAE
ECAP
MAGNESIUM ALLOYS
MICROSTRUCTURE
MORPHOLOGICAL CHANGES
Mg
STRESS RELAXATION
TEXTURE
TWINNING