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Microstructure Characterization of ZK60 Magnesium Alloys Using TEM and HR-EBSD

Published online by Cambridge University Press:  06 August 2013

Jae-Hyung Cho ,
Soo-Hyun Kim ,
Sang-Ho Han  and
Suk-Bong Kang
Jae-Hyung Cho*
Affiliation:
Korea Institute of Materials Science, 797 Changwondaero, Seongsan-gu, Changwon, Gyeongnam 641-831, Republic of Korea
Soo-Hyun Kim
Affiliation:
Busan Techno Park, 1274 Jisa-dong, Gangseo-gu, Busan 618-230, Republic of Korea
Sang-Ho Han
Affiliation:
Korea Institute of Materials Science, 797 Changwondaero, Seongsan-gu, Changwon, Gyeongnam 641-831, Republic of Korea
Suk-Bong Kang
Affiliation:
Korea Institute of Materials Science, 797 Changwondaero, Seongsan-gu, Changwon, Gyeongnam 641-831, Republic of Korea
*
*Corresponding author. E-mail: [email protected]
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Abstract

ZK60 (Mg–Zn–Zr) alloys exhibited a variation in precipitates with aging, and their mechanical properties also changed. Microindentation tests were carried out on two types of ZK60 alloys of solid solution (T4) and peak aging (T6). Microstructure and texture evolution during indentation was investigated using electron backscatter diffraction. Twinning occurred near the indentation marks in most grains. It was found that tensile twinning was dominant, and two twin variants were usually observed. Texture and microstructure evolution by twinning and slip activation was further examined by uniaxial compression test with strain. The initial random orientation gradually changed into basal fibers with strain. Some grains with nonbasal orientations aligned with the loading direction easily underwent twinning followed by slip deformation. Other grains near basal orientations revealed only slip deformation.

Keywords

magnesium alloysZK60indentationcompressionmicrostructureEBSDTEMtwin variants
Type
Research Article
Information
Microscopy and Microanalysis , Volume 19 , Supplement S5: IUMAS , August 2013 , pp. 8 - 12
Copyright
Copyright © Microscopy Society of America 2013 

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