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Investigation of precipitate hardening of slip and twinning in Mg5%Zn by micropillar compression

journal contribution
posted on 2015-11-01, 00:00 authored by Jiangting Wang, N Stanford
A Mg-5%Zn alloy has been aged to form c-axis rod precipitates which are known to increase strength. Micropillar compression tests were carried out in the precipitate-free and aged samples to investigate the effects of these precipitates on twinning and slip in magnesium alloys. Basal slip, pyramidal slip and {101¯2} twinning were selectively activated by compressing micropillars in the [112¯3], [0 0 0 1] and [112¯0] orientations, respectively. It has been found that precipitation causes moderate hardening of the basal slip system, and also significantly increases the work hardening rate. The compression of [112¯0] initiated twinning, but the present experiments were dominated by twin nucleation, rather than growth. It was found that the effect of precipitation on twin nucleation was negligible. Precipitation had little effect on specimens compressed in the c-axis.

History

Journal

Acta materialia

Volume

100

Pagination

53 - 63

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

1359-6454

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2015, Elsevier