Commercial purity aluminium plate was reduced by rolling under nitrogen in 30 passes from an initial material thickness of 10 mm to a final thickness of 2 mm (80% reduction). Analysis of the microstructure showed that the material produced in this way had an ul-trafine grained microstructure. The sheet was roll formed at room temperature to a V-section using commercial roll forming equipment. Two sets of experiments were per-formed; one with a 15 mm radius in the base of the V and the other with a 5 mm radius. The performance in terms of final shape and springback is compared with the same part shape formed by V-die bending. The mechanical properties of the sheet were determined using the tensile test. It has been found that even if the total tensile elongation is close to zero and bending of the material is very limited, ultra-fine grained and low ductile sheet metals can be roll formed to simple section shapes.
History
Event
Advances in Materials & Processing Technologies. Conference (15th : 2012 : Wollongong, New South Wales)
Pagination
1 - 5
Publisher
University of Wollongong
Location
Wollongong, New South Wales
Place of publication
Wollongong, N.S.W.
Start date
2012-09-23
End date
2012-09-26
Language
eng
Publication classification
E1 Full written paper - refereed
Copyright notice
2012, Trans Tech Publications
Title of proceedings
AMPT 2012 : Proceedings of the 15th Advances in Materials & Processing Technologies Conference