1991-02-01

Creep of Diecast Magnesium Alloys AZ91D and AM60B 910416

Long term creep tests of diecast AZ91D and AM60B were conducted for periods of 30 days to nine months at temperatures up to 150°C. Stresses from 19 to 111 MPa were employed. Thermally activated creep did not occur when the temperature was below 100°C and the stress below 25 MPa. Under these conditions the creep rate eventually diminished to zero.
AZ91D metal matrix composite specimens reinforced with 15 volume percent silicon carbide creep tested at 150°C exhibited much improved creep resistance over monolithic AZ91D.

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