Fabrication of hybrid nanocrystalline Al-Ti alloys by mechanical bonding through high-pressure torsion
Bazarnik, Piotr (Warsaw University of Technology)
Bartkowska, Aleksandra (Universitat Autònoma de Barcelona. Departament de Física)
Huang, Yi (Bournemouth University. Department of Design and Engineering)
Szlązak, Karol (Warsaw University of Technology)
Adamczyk-Cieślak, Bogusława (Warsaw University of Technology)
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)
Lewandowska, Malgorzata (Warsaw University of Technology)
Langdon, Terence G. (University of Southampton. Department of Mechanical Engineering)

Data:	2022
Resum:	This study demonstrates an approach of utilizing high-pressure torsion (HPT) to fabricate a novel hybrid material by the direct bonding of Al and Ti disks at room temperature under a compressive pressure of 6. 0 GPa and with increasing numbers of HPT turns up to 50. Detailed structural observations revealed the formation of a multi-layered nanostructure in the edge regions of the disks with a grain size of ∼30 nm. X-ray diffraction (XRD) and selected area electron diffraction (SAED) confirmed the presence of three intermetallic compounds, AlTi, Al3Ti and Ti3Al, in the layered structures. Processing by HPT led to the formation of a hybrid nanocomposite with exceptional hardness (over 300 Hv) in the edge regions of the disks. Special emphasis was placed on understanding the evolution of hardness in the hybrid material. The investigation demonstrates a significant opportunity for using HPT processing to deepen the knowledge on diffusion bonding and mechanical joining technologies as well as for fabricating new and valuable hybrid nanomaterials.
Ajuts:	European Commission 267464 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-0292
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	High-pressure torsion ; Hybrid materials ; Titanium ; Aluminium ; Ultrafine grains
Publicat a:	Materials science & engineering. Structural materials: properties, microstructures and processing, Vol. 833 (January 2022) art. 142549, ISSN 0921-5093

DOI: 10.1016/j.msea.2021.142549

Postprint 19 p, 407.0 KB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > Grup de nanoenginyeria de materials, nanomagnetisme i nanomecànica (Gnm3)
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