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章桥新,李国豪,刘兆冰,赵安国,熊新红,雷永杰.7075-O铝合金板料的摩擦搅拌渐进成形:成形零件性能的实验研究[J].稀有金属材料与工程(英文),2018,47(12):3659~3665.[zhang qiaoxin,liguohao,liu zhaobing,zhao anguo,xiong xinhong and lei yongjie.Friction Stir Incremental Forming of AA7075-O Sheets: Experimental Investigations on Performance Evaluation of Formed Parts[J].Rare Metal Materials and Engineering,2018,47(12):3659~3665.]
Friction Stir Incremental Forming of AA7075-O Sheets: Experimental Investigations on Performance Evaluation of Formed Parts
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Received:June 08, 2017  Revised:August 05, 2017
DOI:
Key words: friction stir incremental forming  formability  surface quality  mechanical property  thickness distribution
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
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zhang qiaoxin,liguohao,liu zhaobing,zhao anguo,xiong xinhong and lei yongjie  
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Abstract:
      A comprehensive performance of formed parts is studied in Friction Stir Incremental Forming (FSIF). In this paper, various tool rotation speeds are set to form two typical parts (truncated funnel and pyramid frustum). Specifically, formability, surface quality, tensile strength, micro-hardness and thickness distribution are investigated and analyzed. Experimental results show that the formability generally increases as tool rotation speeds increase. On the contact surface, variation trends of the surface roughness are different in horizontal direction (parallel to tool path) and vertical direction (perpendicular to tool path). However, the surface roughness on the non-contact surface is almost not affected by tool rotation speed. Furthermore, mechanical properties including tensile strength and surface micro-hardness in formed parts are obviously enhanced compared to the initial sheet, of which the hardness values begin to fall down gradually after rotation speed reaches 3000 rpm. As for thickness measurement, more uniform thickness distribution of formed parts can be obtained at relative high tool rotation speeds. In general, parts formed at high rotation speed have a better comprehensive performance except the mechanical property.