Enhanced mechanical properties of AZ31B magnesium alloy thin sheets processed by on-line heating rolling

Pan, Fusheng, Zeng, Bin, Jiang, Bin, Zhang, Mingxing and Dong, Hanwu (2017) Enhanced mechanical properties of AZ31B magnesium alloy thin sheets processed by on-line heating rolling. Journal of Alloys and Compounds, 693 414-420. doi:10.1016/j.jallcom.2016.09.220


Author Pan, Fusheng
Zeng, Bin
Jiang, Bin
Zhang, Mingxing
Dong, Hanwu
Title Enhanced mechanical properties of AZ31B magnesium alloy thin sheets processed by on-line heating rolling
Journal name Journal of Alloys and Compounds   Check publisher's open access policy
ISSN 0925-8388
1873-4669
Publication date 2017-02-05
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.jallcom.2016.09.220
Open Access Status Not yet assessed
Volume 693
Start page 414
End page 420
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Subject 2211 Mechanics of Materials
2210 Mechanical Engineering
2506 Metals and Alloys
2505 Materials Chemistry
Abstract A series of AZ31B magnesium alloy thin sheets were prepared by on-line heating rolling processing at temperatures ranging from 443 K to 623 K with intervals of 60 K to a total thickness reduction of ∼80% from initially 4 mm down to ∼0.8 mm in 7 passes. The experimental results suggest that the fracture elongation value increases rapidly at temperatures below 563 K, and then tends to be stable (563 K-623 K). Whereas the tendency of strength, including yield strength (YS) and ultimate tensile strength, is just an opposite one. Serrated edge in sheets manufactured with low temperatures of 443 K and 503 K. As temperature increases above 563 K, no obvious edge crack can be observed. In addition, YS is sensitive to the grain size at low temperatures while insensitive at higher temperatures, resulting in a significant deviation of the YS from the Hall-Petch (H-P) law. In order to elucidate this deviation, a model of framework is proposed which suggests that the strengthening effects of deformed grains and subgrains are weakened with the increase of the fraction of DRX grains till to losing efficacy when the latter surpasses a certain value, herein about 70%.
Keyword Dynamic recrystallization
Magnesium alloy
On-line heating
Rolling
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 51504052
CSTC2013JCYJC60001
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
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