Creep Resistance of Die-Cast Mg-Al-Base Alloys

Creep Resistance of Die-Cast Mg-Al-Base Alloys

The deformation resistance under creep conditions was investigated at temperatures up to 150 deg C for the high-purity die-cast alloys AZ91, AS21, AS41, AM60 and AE42. Results are reported for the work hardening at constant strain rate of 10 exp -3 /s up to a certain stress and the subsequent creep....

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Veröffentlicht in:Materials science forum 2000-01, Vol.350-351, p.141-150
Hauptverfasser: Watzinger, B., v. Grossmann, B., Lipowski, H., Blum, Wolfgang, Zhang, P., Haldenwanger, H.-G.
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Sprache:eng
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Applied sciences
Condensed matter: structure, mechanical and thermal properties
Creep
Exact sciences and technology
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Metals. Metallurgy
Physics
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container_end_page 150
container_issue
container_start_page 141
container_title Materials science forum
container_volume 350-351
creator Watzinger, B.
v. Grossmann, B.
Lipowski, H.
Blum, Wolfgang
Zhang, P.
Haldenwanger, H.-G.
description The deformation resistance under creep conditions was investigated at temperatures up to 150 deg C for the high-purity die-cast alloys AZ91, AS21, AS41, AM60 and AE42. Results are reported for the work hardening at constant strain rate of 10 exp -3 /s up to a certain stress and the subsequent creep. The influence of temperature on creep can be described on the basis of thermal activation with a single apparent activation energy of about 135 kJ/mol. Comparison of the times for creep by strains Delta epsilon = 0.003, 0.01, and 0.05 indicate that die-cast AZ91 has a relatively good creep resistance at temperatures up to 150 deg C compared to annealed AZ91 as well as the other investigated die-cast Mg-Al-base alloys at stresses above 100 MPa. Below 100 MPa the creep resistance of AS21 and AS41 is distinctly better than that of AZ91, probably due to better precipitation hardening.
doi_str_mv 10.4028/www.scientific.net/MSF.350-351.141
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subjects Applied sciences
Condensed matter: structure, mechanical and thermal properties
Creep
Exact sciences and technology
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Metals. Metallurgy
Physics
title Creep Resistance of Die-Cast Mg-Al-Base Alloys
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