222 軽金属の摩擦撹拌プロセスによる組織制御と機械的性質(加工による機能創製)

概要

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Feasibility of friction stir processing (FSP) has been examined on microstructure control of A7075-T6 Al alloy and ZK-60A Mg alloy plates. It becomes evident that FSP is quite effective for grain refinement of both A7075-T6 and ZK-60A alloys. It appears that probable mechanism for the grain refinement is dynamic continuous recrystallization. A grain-refined A7075-T6 alloy has shown superplasticity at high temperatures. Concerning FSP'ed ZK-60A Mg alloy, formation of basal plane texture around the circumferential direction of the FSP tool was observed. Although, under a few FSP conditions, formation of defects were found for the ZK-60A alloy, we have concluded that FSP is a very effective technique for producing very fine and equiaxed microstructures in the both alloy plates.
一般社団法人日本機械学会の論文
2007-11-16