OS0307 ワイヤブラッシング表層強加工を施したMg合金(非立方晶型金属材料の変形現象とそのモデル化,オーガナイズドセッション)

概要

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The instrumented wire-brushing process was applied to the AZ31B alloy sheets, and microstructure and mechanical properties of wire-brushed AZ31B alloys sheets by four different conditions were investigated. Two different loads (1kgf and 3kgf) and feed speeds (High and Low) were used: 1-H, 3-H, 1-L and 3-L. Nanocrystals were obtained near surface after the wire-brushing. The size of nanocrystals depends on the feed speed rather than the load. The 0.2% proof stress and tensile strength increased after the wire-brushing on most conditions, although the elongation decreased. The increasing 0.2% proof stress and tensile strength would result from the grain refinement. On the other, 0.2% proof stress, tensile strength and elongation of the wire-brushed sheet were smaller than those of the starting sheet when the surface is rough after the wire-brushing, because the stress-concentration factor increases with increasing roughness.
一般社団法人日本機械学会の論文
2009-07-24