Benefits of thixoforging hot-crack-sensitive aluminium alloys at high solid fraction

Grégory Vaneetveld,Ahmed Rassili,Jean-Christophe Pierret,Jacqueline Lecomte-Beckers

Benefits of thixoforging hot-crack-sensitive aluminium alloys at high solid fraction

2010

Grégory Vaneetveld
Ahmed Rassili
Jean-Christophe Pierret
Jacqueline Lecomte-Beckers

Thixoforging is a type of semi-solid metal processing at high solid fraction (0.7aluminium alloys. Hot cracking occurs because of strain and deformation during last step of solidification. This paper shows how thixoforging process should help to lower hot cracking tendency without modification of the alloy composition by decreasing strain and deformation due to shrinkage. Different experimental tests by extrusion of 7075 aluminium alloys are used.

Keywords:

Composite material
Aluminium alloy
Microstructure
Extrusion
Metallurgy
Alloy
Aluminium
Materials science
Strain (chemistry)
Metal
Cracking
Shrinkage
liquid phase
Deformation (mechanics)
solid fraction

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