K-1018 軽量合金微細化のための温間バルクメカニカルアロイング(S12-3 粉末成形とその評価(3))(S12 粉末成形とその評価)

概要

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The bulk mechanical alloying process has been developed not only to make microstructure refinement for structural materials but also to make solid-state synthesis of alloys and compounds for various functional material systems. Different from the conventional milling and attriting, this process is driven both by irreversible geometric transformation and inner-energy supply through the plastic work. Hence, bulk mechanical alloying can be activated by increasing the holding temperature, since the plastic work needed, decreases with reduction of flow stress in increasing the temperature. In the present, new die set system is designed and used for warm bulk mechanical alloying of AZ91 magnesium alloys. Effect of holding temperature on the grain size and microstructure refinement is discussed from the experimental results.
2001-08-22