Strain-Hardening Behavior of Mg-Li-Zn Alloy Thin Sheets under Tension

Abstract:

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This work examined the effects of Li content on the strain-hardening behaviors of three varieties of Mg−Li−Zn alloys containing approximately 6 wt%, 9 wt%, and 10 wt% of Li. Tensile tests were carried out on specimens in the directions of 0, 45 and 90° to the rolling direction. Kocks–Mecking type plots were constructed to illustrate different stages of strain-hardening. The cold-rolled Mg−6Li−1Zn (designated as LZ61) alloy sheet showed stage II and stage III strain-hardening behaviors at room temperature. The specimens of Mg−9Li−1Zn (designated as LZ91) and Mg−10Li−1Zn (designated as LZ101) alloy sheets did not show stage II strain-hardening. Higher initial strain-hardening rates were observed in the 90° direction for these alloys as a result of the cold-rolled fibrous structure affording stronger barriers to dislocation movements in this direction.

Info:

Periodical:

Advanced Materials Research (Volumes 146-147)

Edited by:

Sihai Jiao, Zhengyi Jiang and Jinglong Bu

Pages:

1361-1364

DOI:

10.4028/www.scientific.net/AMR.146-147.1361

Citation:

H. Y. Wu et al., "Strain-Hardening Behavior of Mg-Li-Zn Alloy Thin Sheets under Tension", Advanced Materials Research, Vols. 146-147, pp. 1361-1364, 2011

Online since:

October 2010

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$35.00

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