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Indexed by:期刊论文

Date of Publication:2014-01-01

Journal:JOURNAL OF MATERIALS PROCESSING TECHNOLOGY

Included Journals:SCIE、EI

Volume:214

Issue:1

Page Number:60-66

ISSN No.:0924-0136

Key Words:Clad hollow billet; Aluminum alloys; Casting; Interfaces; Microstructure; Plastic deformation

Abstract:The 3003/4045 clad hollow billets are prepared in the present study. Microstructures, solute distribution and bonding strength of the interfacial regions were investigated. The effects of plastic deformation on the evolution of microstructure and microhardness of the interfaces were also studied. The results show that metallurgical bonding between the solid and liquid Al alloys can be obtained with optimal parameters. Si and Mn atoms diffuse across the interface to form a diffusion layer with the thickness about 30 pm on average. The mean tensile-shear strength of as-cast clad hollow billet is 85.3 +/- 9.2 MPa, and the strength of the interface is higher than that of 3003 alloy. Incompatible deformation between 3003 and 4045 layers occurs during rolling processes, and the needle-like Si phase transforms to the dispersive particles. The gradient distribution of microhardness across the interface is retained after the deformation. (C) 2013 Elsevier B.V. All rights reserved,