Variation in Crystallographic Orientation and Twinning Activation with Size of Individual Grains in Rolled Magnesium Alloy
- Authors
- Kim, Ye Jin; Lee, Jong Un; Kim, Sang-Hoon; Yoon, Jonghun; Kim, Young Min; Park, Sung Hyuk
- Issue Date
- Nov-2019
- Publisher
- KOREAN INST METALS MATERIALS
- Keywords
- Magnesium; Twinning; Grain size; Crystallographic orientation; Schmid factor
- Citation
- METALS AND MATERIALS INTERNATIONAL, v.25, no.6, pp.1541 - 1547
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- METALS AND MATERIALS INTERNATIONAL
- Volume
- 25
- Number
- 6
- Start Page
- 1541
- End Page
- 1547
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/2055
- DOI
- 10.1007/s12540-019-00321-3
- ISSN
- 1598-9623
- Abstract
- This study demonstrates that the size of an individual grain in a rolled AZ31 alloy is significantly related to the crystallographic orientation of the grain and the area fraction of the {10-12} twinned region formed in the grain after compression along the rolling direction. With an increase in the size of an individual grain from 11 mu m to 80 mu m, the angle between the c-axis of the grain and the normal direction of rolling plane decreases from 38 degrees to 5.5 degrees and the Schmid factor for {10-12} twinning of the grain increases from 0.29 to 0.5. As a result, the area fraction of the twinned region formed in the grain increases from 30% to 100% owing to the combined effect of an increase in the Schmid factor value and a decrease in the stress required for activation of twinning by the increased grain size. The grain size (GS), Schmid factor for {10-12} twinning (SFtwin), and twin fraction (TF) have the relation TF/SFtwin = 109.8 + 1.45GS.
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