Twinning and Detwinning during Cyclic Deformation of Mg Alloy AZ31B

Abstract:

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Textured Mg alloys exhibit tension – compression strength asymmetry due to mechanical twinning. The distinction arises as the material deforms primarily by slip in one direction and by twinning in the other. In-situ neutron diffraction during cyclic loading in tension and compression of extruded bar allows study of the effect of twinning on subsequent load reversals. The diffraction data reveal the texture evolution and internal stress development as a function of deformation. De-twinning resulted in complete texture reversal during initial cycles, but eventually “fatigued” resulting in some residual twin component.

Info:

Periodical:

Materials Science Forum (Volumes 539-543)

Main Theme:

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran

Pages:

3407-3413

DOI:

10.4028/www.scientific.net/MSF.539-543.3407

Citation:

D. W. Brown et al., "Twinning and Detwinning during Cyclic Deformation of Mg Alloy AZ31B", Materials Science Forum, Vols. 539-543, pp. 3407-3413, 2007

Online since:

March 2007

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Price:

$35.00

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