High strength Mg-Y-Zn alloy by friction stir processing
- Chung S.W. ,
- Morishige T. ,
- Tsujikawa M. ,
- et al
- Chung S.W. ,
- Morishige T. ,
- Tsujikawa M. ,
- Takigawa Y. ,
- Oki S. and
- Higashi K.
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Friction stir processing (FSP) was employed for grain refinement and strengthening of cast Mg, 5.9%Y, 2.6%Zn alloys and the microstructure and mechanical properties of the processed material were investigated. Specimens comprised plates (thickness 10 mm) cut from cast ingots and subjected to homogenisation heat treatment. The parameters varied during FSP were rotation speed and welding speed. The microstructures of as-cast, cast-then-homogenised and processed material were observed by optical microscopy and SEM. Mechanical properties were characterised by micro-Vickers hardness tests. Aspects discussed include lamellar structure development during homogenisation, intermetallic compound formation in FSP, and stir zone hardness.
6th International Symposium, 10-13 Oct 2006, Session 3B: Friction Stir Processing, Paper 02
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