Friction Stir Incremental Forming of A2017 Aluminum Sheets
Friction Stir Incremental Forming of A2017 Aluminum Sheets
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DOI：
10.1016/j.proeng.2014.10.327
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
M. Otsu;Mitsuteru Yasunaga;M. Matsuda;K. Takashima
中科院分区：
文献类型：
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作者：
M. Otsu;Mitsuteru Yasunaga;M. Matsuda;K. Takashima
研究了A2017-T3铝合金薄板的搅拌摩擦渐进成形性能。将尺寸为100 mm X 100 mm X 0.5 mm的A2017-T3铝合金板通过直径为6 mm的半球形工具成形为具有40 mm X 40 mm正方形底部的棱锥形状的截头体。成形性通过可成形壁角来评价。当刀具转速为8000 - 10000 rpm，进给速度为3000 mm/min时，成形性最大，最小壁角为25 °。对成形后的板材进行人工时效处理，并进行维氏硬度测试，以确认成形过程中温度升高的影响。由于加工硬化，所形成的片材的硬度增加。然而，随着老化时间的增加，硬度因过度老化而降低。成形板材的抗拉强度介于原始板材和过时效板材之间。在69%的对数应变后，成形板的断裂伸长率略小于接收时的断裂伸长率，但大于时效时的断裂伸长率。
Formability of A2017-T3 aluminum alloy sheets by friction stir incremental forming was studied. A2017-T3 aluminum alloy sheets with a size of 100 mm x 100 mm x 0.5 mm were formed into frustum of pyramid shape having 40 mm x 40 mm right square bottom by a hemispherical tool with a diameter of 6 mm. Formability was evaluated by formable wall angle. When the tool rotation rate was 8000 - 10000 rpm and the tool feed rate was 3000 mm/min, the formability became maximum and the minimum wall angle was 25o. The formed sheets were artificially aged and Vickers hardness test was performed to confirm the effect of temperature elevation during forming. The hardness of the formed sheets was increased due to the work hardening. As aging time increased, however, the hardness was decreased by over aging. The tensile strength of the formed sheet was the intermediate value between as received and over aged ones. The fracture elongations of the formed sheet after giving 69% logarithmic strain was a little less than as received one but greater than aged one.