Paper Title:
Rheological Transitions at Low Solid Fraction in Solidifying Magnesium Alloy AZ91
  Abstract

Transitions in the mechanical behaviour of solidifying alloys influence feeding mechanisms and defect formation during many casting processes. This paper explores dendrite coherency and the cracking transition during the equiaxed dendritic solidification of Mg alloy AZ91 using the continuous-torque technique and vane rheometry. The two techniques yielded similar dendrite coherency values of ~17% solid, and the cracking transition occurred at 40% solid in vane rheometry tests. These transition values are similar to those reported for Al alloys with equiaxed dendritic morphology and a similar grain size.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
1067-1070
DOI
10.4028/www.scientific.net/MSF.561-565.1067
Citation
C. M. Gourlay, B. Meylan, A. K. Dahle, "Rheological Transitions at Low Solid Fraction in Solidifying Magnesium Alloy AZ91", Materials Science Forum, Vols. 561-565, pp. 1067-1070, 2007
Online since
October 2007
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Price
$32.00
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