Paper Title:
Long Term Creep Properties of a Die-Cast Mg-Al-Ca Alloy
  Abstract

Creep rupture tests were performed for a die-cast Mg-Al-Ca alloy AX52 (X representing calcium) at 29 kinds of creep conditions in the temperature range between 423 and 498 K. The creep curve for the alloy is characterized by a minimum in the creep rate followed by an accelerating stage. The minimum creep rate (ε& m) and the creep rupture life (trup) follow the phenomenological Monkman-Grant relationship; trup = C0 /ε& m m. It is found for the AX52 die-cast alloy that the exponent m is unity and the constant C0 is 2.0 x 10-2, independent of creep testing temperature. The values of m and C0 are compared with those for another die-cast magnesium alloys. The value m=1 is generally detected for die-cast magnesium alloys. On the contrary, the value of C0 sensitively depends on alloy composition, which is reduced with increasing the concentration of alloying elements such as Al, Zn and Ca.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
163-166
DOI
10.4028/www.scientific.net/MSF.561-565.163
Citation
Y. Terada, T. Sato, "Long Term Creep Properties of a Die-Cast Mg-Al-Ca Alloy", Materials Science Forum, Vols. 561-565, pp. 163-166, 2007
Online since
October 2007
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$32.00
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