Abstract
The creep tests were performed at 473 K in the range of 40-80 MPa on the AZ31 alloy extruded rod in which microstructures are controlled by pre-compression and heat treatment. The microstructures were characterized by EBSD. As a result, fraction of grains in which basal planes were almost perpendicular to extruded direction were evaluated after microstructure control by pre-compression and heat treatment. In addition, remarkable coarsening grains were confirmed. In the creep test, it was found that the minimum true strain rate and the rupture life were improved by microstructure control. The coarsened grains and texture control are considered to be the factors for improving the creep resistance.
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