Optimum engine models for diesel automotive powertrain development processes

Osborne, Richard; Weaver, N.

doi:10.1533/9781845692032.2.67

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The Study of the Behavior of Constrained Groove Pressed Magnesium Alloy after Heat Treatment

Zimina

Bohlen²,

Letzig³

et al. 2015

Acta Phys. Pol. A

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In this work twin-roll cast AZ31 magnesium strip of thickness 5.6 mm was subjected to the heat treatment and further constrained groove pressing. A comparison of the microstructure and microhardness of as-cast, constrained groove pressed and annealed material was carried out. The twin-roll cast strip exhibits an inhomogeneous structure which is replaced by a ner and uniform recrystallized one after aging at 450• C for 10 h. A signicant increase of the microhardness was observed accompanied by a pronounce grain renement. Nevertheless, the distribution of the grain size is unequal along the specimen width. Thermal stability of the deformed structure during subsequent annealing was investigated. It was shown that higher annealing temperatures result in a formation of a more uniform recrystallized structure and in a signicant drop of microhardness down to the values obtained for as-cast alloy.

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