Journal
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
Volume 209, Issue 7, Pages 3621-3627Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2008.08.018
Keywords
Hot shear spinning; Cast aluminium alloys; Casting defects; Formability; Surface cracks
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A hot shear spinning process of cast aluminium alloy parts was developed to eliminate casting defects and to obtain a desired distribution of wall thickness. The forming load of the shear spinning is comparatively low even for large deformation requisite for eliminating the casting defects. Dendrites and shrinkage cavities in the cast aluminium alloys were successfully eliminated without occurrence of a fracture by the hot shear spinning. Surface cracks around the corner of the mandrel caused by large shear deformation were reduced by decreasing the feed rate of the roller and by increasing the tip radius of the roller. It was found that hot shear spinning is effective in improving the mechanical properties of cast aluminium alloys parts. (C) 2008 Elsevier B.V. All rights reserved.
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