New metallic materials or composites are studied and developed.
A unique combination of melting furnaces and metal working facilities (rolling, forging, drawing) allows laboratory-sized or small-sized production for subsequent testing or use in special application.
Numerous materials have been produced and characterised, among which titanium alloys, copper based foams, aluminium based composites, shape memory alloys, refractory alloys, precious metals, and biodegradable metals.
The activities are performed in the Melting Lab and in the Plastic deformation & Heat treatment Labs.
The former is provided with induction melting machines (VIM - Vacuum Induction Melting) operating on different ingot size, electric arc furnace (VAR - Vacuum Arc Remelting) and also a Plasma Arc Melting (PAM) system. Ingots are produced with weight ranging from few grams to 1-10kg, depending on ally density. Not only bulk ingots were produced, but also porous materials, by using liquid metals infiltration techniques.
The equipment of Plastic deformation Lab & Heat treatment Labs allows hot and cold working of metals and alloys on medium sized scale. Samples with different thermo-mechanical history, as well as different shapes (sheets, rods, wires) and sizes can be prepared. Useful processing information are also derived, as main research purpose or as complementary information.
More recently alternative deformation techniques were introduced, such as:
- Severe plastic deformation methods ( ECAP – Equal Channel Angular Pressing)
- Mechanical activation/mechanical alloying through a planetary milling machine
- Open Die Pressing for powder sintering.
melting plastic deformation mechanical activation thermal treatment thermo-mechanical processing
A. Tuissi, G. Rondelli, P. Bassani
Plasma arc melting (PAM) and Corrosion resistance of pure NiTi shape memory alloys
Shape memory and Superelasticity, Volume 1 Number 1 (2015)1:50-57 DOI 10.1007/s40830-015-0011-6
S.A.M. Tofail, J. Butler, A.A. Gandhi, J.M. Carlson, S. Lavelle, S. Carr, P. Tiernan, G. Warren, K. Kennedy, C.A. Biffi, P. Bassani, A. Tuissi
X-ray visibility and metallurgical features of NiTi shape memory alloy with erbium
Materials Letters, 137(2014) 450-454
Riccardo Casati, Maurizio Vedani, David Dellasega, Paola Bassani, Ausonio Tuissi
Consolidated Al/Al2O3 Nano-composites by Equal Channel Angular Pressing and Hot Extrusion
Materials and Manufacturing Processes, DOI: 10.1080/10426914.2014.912305
C.A. Biffi, M. Coduri, H. Yoshida, Y. Soejima, M. Nishida, A. Tuissi
The Effect of Thermal Cycling on the Martensitic Transformation in Equiatomic CuZr
Journal of Alloys and Compounds. Doi:10.1016./j.jalcom.2015.09.022
C.A. Biffi, A. Figini, A. Tuissi
Influence of Compositional Ratio on Microstructure and Martensitic Transformation of CuZr Shape Memory Alloys
Intermetallics 46C (2014), pp. 4-11 DOI information: 10.1016/j.intermet.2013.10.018
- A. Tuissi, G. Rondelli, P. Bassani