Research delivers enhanced properties for hybrid metal sheets

Research delivers enhanced properties for hybrid metal sheets

The automotive, construction, mining and defense industries are in constant search for strong, tough and light materials. The materials of choice, such as light alloys, namely: magnesium, aluminum, titanium, as well as copper alloys have reached their limits in term of the achievable properties, while steels usually do not satisfy the “strong-and-light” criterion. The possibility to produce metal-metal composites by combining different metals using special geometry and length scale of the “inner architecture” of the engineered composite presents a unique opportunity to create a new composite materials with superior properties.

The development of nano-structuring technologies based on severe plastic (shear) deformation, so called SPD-processes, has made possible the production of metallic hybrid materials such as Fe/Al, Ti/Cu, Twinning Induced Plasticity (TWIP)/ Transformation Induced Plasticity (TRIP) steels composite etc. for different applications. Among several SPD methods, accumulative roll bonding (ARB) available at IFM, Deakin University has been well tested for production of multilayered – hybrids.

A correlative microscopy approach, i.e. combining information obtained from techniques such as atom probe tomography (APT), transmission electron microscopy (TEM) and electron backscattering analysis (EBSD) on samples prepared using focused ion beam/scanning electron microscope (FIB/SEM) all available at IFM, Deakin University, enables to a precise control of the metallic hybrid microstructures over a range of length scales, from micro to nano-scale.

As a result, we are able to design hybrid material with desirable properties at minimum cost and to create new modelling approach to predict and optimize the properties of hybrid materials.

 

 

Multilayered – composites (hybrid materials) can overcome the drawbacks of light alloys and steels. The lightweight hybrid materials could be cost-effective product, which assure the increasing range of their applications. A breakthrough in development of metallic hybrid materials came with advancement of nano-structuring technologies based on severe plastic (shear) deformation such as accumulative roll bonding (ARB), which enables to form strong bonding between the layers in the hybrid materials. The interfaces between layers of constituents in the hybrid materials will be studied by a correlative microscopy approach. Based on this study, a model for constitutive behaviour of multicomponent materials will be developed.

2015-current

The development of nano-structuring technologies based on severe plastic (shear) deformation, so called SPD-processes, has made possible the production of metallic hybrid materials such as Fe/Al, Ti/Cu, Twinning Induced Plasticity (TWIP)/ Transformation Induced Plasticity (TRIP) steels composite etc. for different applications. Among several SPD methods, accumulative roll bonding (ARB) available at IFM, Deakin University has been well tested for production of multilayered – hybrids. A correlative microscopy approach, i.e. combining information obtained from techniques such as atom probe tomography (APT), transmission electron microscopy (TEM) and electron backscattering analysis (EBSD) on samples prepared using focussed ion beam/scanning electron microscope (FIB/SEM) all available at IFM, Deakin University, enables to a precise control of the metallic hybrid microstructures over a range of length scales, from micro to nano-scale. As a result, we are able to design hybrid material with desirable properties at minimum cost and to create new modelling approach to predict and optimize the properties of hybrid materials.

We aim to use a new approach to material design to satisfy the “strong-and-light” criterion by: (i) employing the novel strengthening mechanisms available in steels, (ii) creation of strong interfaces in the multilayers hybrid materials, (iii) using severe plastic (shear) deformation to produce the hybrid materials. We expect to propose considerable light-weighting hybrid materials with the properties that can address some major challenges facing the automotive, construction, defence and mining industries.

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Deakin University

Status

Ongoing

Principal Lead

A/Prof Rimma Lapovok

A/Prof Rimma Lapovok is one of the key technical leaders and innovators within the global scientific community dealing with nanostructured and ultrafine grained metals and alloys. Building upon her rigorous training in theoretical and applied mechanics, plus practical experience in metal forming technology and material science, she has pioneered the new methods to process and understand the properties of bulk ultrafine grained metals and alloys via severe plastic deformation.

Researchers

Dr Ilana Timokhina

Dr Ilana Timokhina

Dr. Ilana Timokhina is a Senior Research Academic at the Institute for Frontier Materials, Deakin University, Australia. 

Dr Timokhina has 5 years’ experience in the semiconductor thin films area and over 15 years’ experience in physical metallurgy of metals and alloys. Her work involved conceiving and managing research programs of various degrees of complexity. Dr Timokhina’s key research areas are development of complex advanced high strength multiphase steels to achieve optimum material performance (two “Best Paper” awards related to this work), nano-structural materials with balanced strength and ductility produced through different severe plastic deformation processes and subsequent heat treatment, fundamental understanding of strengthening mechanisms in metals, composite and upcycling materials. She uses correlative microscopy i.e. Scanning, Transmission, Ion Beam, Electron Backscattering Electron microscopy, Atom Probe Tomography, Neutron and X-Ray diffraction as the main approach to solve scientific problems. Dr Timokhina has published more than 130 scientific papers (1792 citations, h-index 23), two book chapters, was invited speaker at many international conferences and is a reviewer for a number of international journals and grant schemes.  

Dr Ilana Timokhina
Senior Research Academic
Deakin University
Institute for Frontier Materials, Waurn Ponds Campus, Locked Bag 20000, Geelong, VIC 3220
+61 3 52272562

+61 0425802856

ilana.timokhina@deakin.edu.au
www.deakin.edu.au