Development of friction stir powder processing (FSPP) for prevention of defect formation and control of mechanical properties
- Fujii H. ,
- Inada K. ,
- Su J.Y. ,
- et al
- Fujii H. ,
- Inada K. ,
- Su J.Y. ,
- Sun Y.F. and
- Morisada Y.
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The development and use of friction stir powder processing (FSPP) to overcome defect formation and to control mechanical properties is discussed and FSPP of AA 1050 aluminium (Al, 0.06%Si, 0.34%Fe, 0.02%Cu) is reported. In FSPP, powder with a controlled composition is placed in the gap between two plates, caused by a mismatch at the material interface and resulting in defects and porosities. A1050-H24 sheet (thickness 5 mm) was used to investigate the influence of the gap width on joint properties; 1,2 or 3 mm shims beings placed between the sheets. A SKD61 tool was used with rotation 1500 rpm and travel speed 100 or 400 mm/min. The feasibility of FSPP was evaluated using pure Al and pure Cu powders as filler material in the gap. The elongation, hardness, ductile fracture and precipitate formation were studied. The formation of defects using pure Al powder and the increased hardness resulting from the formation of Al2Cu precipitates in the stir zone using Cu powder is discussed.
8th International Symposium, 18-20 May 2010, Session 9B: FSP and Derivatives, Paper 03
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