Ａｌ‐Ｃｕ‐Ｍｇ‐Ｓｉ系合金の摩擦撹はん接合部組織に及ぼす工具回転数の影響
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The effect of tool rotation speed on the microstructure in the friction stir weld of Al-1.7mass%Cu-1.0mass%Mg-0.8mass%Si alloy T4511 extrusions has been investigated. The increase of heat input with a rotation speed enlarged the grain size in the stir zone. A postweld heat treatment at 195°C for 8h hardly increased the hardness in the stir zone welded at a rotation speed of 1000 rpm and raised the density of the coarse precipitates, Al5Cu6Mg2 phase. At a rotation speed of 1500 rpm, however, the postweld heat treatment produced fine precipitates after the precipitated phase had been already dissolved during the friction stir welding, and increased the hardness of the stir zone up to the same level as that of the base metal T6511.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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