Comparative study of creep of the die-cast Mg-alloys AZ91, AS21, AS41, AM60 and AE42

Comparative study of creep of the die-cast Mg-alloys AZ91, AS21, AS41, AM60 and AE42

The creep resistance of five high-purity die-cast Mg-Al-alloys was investigated in uniaxial compression at temperatures from 70 to 150 deg C. The evolution of deformation resistance under creep conditions is described as a function of strain K. The work hardening in primary creep determines the time...

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Veröffentlicht in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2000-08, Vol.319-321, p.735-740
Hauptverfasser: Blum, W, Zhang, P, Watzinger, B, Grossmann, B V, Haldenwanger, H G
Format: Artikel
Sprache:eng
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Zusammenfassung:The creep resistance of five high-purity die-cast Mg-Al-alloys was investigated in uniaxial compression at temperatures from 70 to 150 deg C. The evolution of deformation resistance under creep conditions is described as a function of strain K. The work hardening in primary creep determines the times for creep by strains < 0.01. Among the investigated alloys AZ91 has the highest creep resistance with the exception of AS41 at stresses below 130 MPa. The microstructural origin of the creep resistance of Mg-Al-alloys is discussed in terms of work hardening by dislocations and hardening by creep-induced precipitation.
ISSN:0921-5093