title: Tensile properties and interfacial bonding of multi-layered, high-purity titanium strips fabricated by ARB process.
abstract: Severe plastic deformation (SPD) processing has shown very effective in promotion of mechanical properties of metals and alloys. In this study, the results of investigating mechanical properties and also inter-layer bond performance of accumulative roll bonded high purity titanium (HP-Ti) strips are presented. High purity titanium plates were severely deformed by use of a combination of cold rolling (CR) to a thickness reduction of approximately 87% and then accumulative roll bonding (ARB) for three cycles (N=3) at ambient temperature. Optical and scanning electron microscopy, tensile testing, and hardness measurements were conducted. The ARB strips exhibited lower tensile strength and ductility in comparison to cold rolled one which can basically be attributed to the poor function of the latest bonds established in the centerlines of the strips. Fractographic examinations revealed the interfacial de-bonding along the centerline between the layers having undergone roll bonding for just one cycle. It was while the interfaces having experienced roll bonding for more cycles showed much higher resistance against delaminating.
authors.affiliation: Research Center for Advanced Materials and Minerals Processing, Faculty of Materials Engineering, Sahand University of Technology, P. O. Box: 51335-1996, Tabriz, Iran. Electronic address: ghaffari6483@yahoo.com.
authors.forename: Soroush
authors.initials: S
authors.lastname: Ghafari-Gousheh
authors.affiliation: Research Center for Advanced Materials and Minerals Processing, Faculty of Materials Engineering, Sahand University of Technology, P. O. Box: 51335-1996, Tabriz, Iran.
authors.forename: Syamak Hossein
authors.initials: SH
authors.lastname: Nedjad
authors.affiliation: Research Center for Advanced Materials and Minerals Processing, Faculty of Materials Engineering, Sahand University of Technology, P. O. Box: 51335-1996, Tabriz, Iran.
authors.forename: Jafar
authors.initials: J
authors.lastname: Khalil-Allafi
mesh_terms: D006244:Hardness; D008422:Materials Testing; D013718:Tensile Strength; D014025:Titanium / Q000737:chemistry*
chemical_list: D014025:Titanium
keywords: De-bonding; Mechanical properties; Severe plastic deformation (SPD); Titanium; Ultra-fine grained materials