Roll-formability of cryo-rolled ultrafine aluminium sheet

Marnette,J, Weiss,M and Hodgson,PD 2014, Roll-formability of cryo-rolled ultrafine aluminium sheet, Materials and design, vol. 63, no. 1, pp. 471-478, doi: 10.1016/j.matdes.2014.06.036.

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Title Roll-formability of cryo-rolled ultrafine aluminium sheet
Author(s) Marnette,J
Weiss,MORCID iD for Weiss,M
Journal name Materials and design
Volume number 63
Issue number 1
Start page 471
End page 478
Publisher Elsevier
Place of publication London, England
Publication date 2014
ISSN 0261-3069
Keyword(s) Bending
Cryo rolling
Incremental forming
Roll forming
Ultrafine-structured aluminium
Science & Technology
Materials Science, Multidisciplinary
Materials Science
Summary Ultrafine-grain aluminium sheet was produced by rolling at cryogenic (CR) and at room temperature (RTR). Commercial purity aluminium plate was reduced in 30 passes from an initial material thickness of 10 mm to a final thickness of 2 mm (80% reduction). Tensile stress and strength were significantly increased while total elongation was drastically reduced. It was found that despite the low tensile elongation both materials are able to accommodate high localised strains in the neck leading to a high reduction in area. The formability of the material was further investigated in bending operations. A minimum bending radius of 6 mm (CR) and 5 mm (RTR) was found and pure bending tests showed homogeneous forming behaviour for both materials. In V-die bending the cryo-rolled material showed strain localisations across the final radius and kinking of the sample. It has been found that even if the total elongation in tension is close to zero leading to early failure in V-die bending, ultra-fine grained and low ductile sheet metals can be roll formed to simple section shapes with small radii using commercial roll forming equipment.
Language eng
DOI 10.1016/j.matdes.2014.06.036
Field of Research 091006 Manufacturing Processes and Technologies (excl Textiles)
091207 Metals and Alloy Materials
Socio Economic Objective 861205 Sheet Metal Products
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Grant ID FL0992361
Copyright notice ©2014, Elsevier
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