Effect of Initial Microstructure under Different Solidification Conditions on Hot Working Behavior of AZ31 Alloy

L. Shang; Stephen Yue; Elhachmi Essadiqi; A. Javaid; Jon T. Carter; Ravi Verma

doi:10.4028/www.scientific.net/MSF.561-565.325

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HomeMaterials Science ForumMaterials Science Forum Vols. 561-565Effect of Initial Microstructure under Different...

Effect of Initial Microstructure under Different Solidification Conditions on Hot Working Behavior of AZ31 Alloy

Abstract:

In order to investigate the effect of the as-cast microstructure on the hot working behavior of an AZ31 magnesium alloy, specimens were cast in copper moulds with and without water cooling. A series of compression tests were performed at a temperature of 350 °C, a strain rate of 0.01 s-1, and at strains up to 1.0. It was found that as-cast microstructure is very sensitive to the solidification conditions, which leads to a significant difference in flow behavior and dynamic recrystallization (DRX) characteristics. It appears that more uniform and refined as-cast grain size promotes dynamic recrystallization and reduces the flow stress. It is also possible that second phases (>1+m in size) contribute to DRX by acting as nuclei.

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Periodical:

Materials Science Forum (Volumes 561-565)

Pages:

325-328

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.561-565.325

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Online since:

October 2007

Authors:

L. Shang, Stephen Yue, Elhachmi Essadiqi, A. Javaid, Jon T. Carter, Ravi Verma

Keywords:

AZ31 Mg Alloy, Hot Working Behavior, Initial Microstructure

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