|SCIENTIFIC DISCIPLINARY SECTOR||ING-IND/21|
Metallic materials are part of our daily life and correspond to a great achievement of millenia of research and development in various fields of knowledge and techonology. This is why the Metallurgy classes touch the fields of archaeology as well of engineering passing through the chemistry and the materials sciences. It starts from "How did we reach this point" to finsh with the modern iron metallurgy.
Basic knowledge of structure and properties of metallic mateirals, their manufacturing and process transformation, thermal treatments and application. Knowledge of the principles to select and manufacture the best matching materials in relation with their practical and industrial usage. Main metallgraphic methods. Skills to recognize the typical microstructures of steels, cast iron at various stages of manufacturing with the link to their properties.
To learn how to correlate the properties of metals with the chemical composition and their thermomechanical history.
Iron base alloys (carbon steel and cast iron) are presented more in detail with practical examples.
It is suggested but not mandatory to have a basic knowledge in Inorganic Chemistry, binary phase diagrams, lattice principles, chemical bonds.
The classes are organized on various levels of complexity in order to support the learning process of students coming from various previous experiences.
Most of classes are held in the classroom with slides and the support of expert's seminars
Lab activities are carreid out as last lessons in the laboratory of metallurgy at the DCCI. These classes are meant to make the student aquainted with the manufacturing and shaping of FCC alloys.
Metals in humankind history, from the discovery to the usage. Why metals and main applications: achievements and perspectives. A closer insight: metal bond and lattice (FCC, BCC, HCP). Fundamentals of crystallography. Defects: punctual linear and volumic. Lattice defects and diffusion. Fick's laws. Defects and plastic deformation. Burger's vector. Frank-Read sources. Cottrel atmospheres and dislocations mobility. Dislocations interaction with inclusions, grain boundaries, precipitates and second phases. Metallic materials characterization methods: Optical Metallography (sampling, polishing, etching, observation), Electron microscopy and chemical analysis (SEM, EDXS), mechanical tests (stress-strain, hardness, toughness), fatigue, creep. Fragile-ductile transition temperature. Critical shear stress. Strengthening methods: alloying, hardening, thermal treatment. Solid solution, intermetallic phase and compound, eutectic reaction, peritectic reaction, phase diagrams. Molten - solid transition of a pure metal, on an alloy. Micro- and Macro-segregation. Primary etching, Fe-C phase diagram. Carbon steel and cast iron. Bain curves, CCC curves. Thermal treatments: in gamma field (annealing, normalizing, quenching), in alpha field (recrystallization annealing, recovery, tempering). Introduction to quenchability measurements (Jominy). Thermo-chemical surface treatments. Practical metallography.
Daniel A. Brandt, Metallurgy Fundamentals, Goodheart-Willcox; Sixth Edition, Textbook (October 9, 2019)
A. Cigada, T. Pastore, Struttura e proprietà dei materiali metallici, McGraw-Hill,
W. Nicodemi, Metallurgia, Zanichelli
R. E. Smallman and A. H.W. Ngan, Physical Metallurgy and Advanced Materials, Butterworth-Heinemann, 2007
In case the student autonomously individuate a book the teachers are available for its evaluation before to proceed with the purchase
PAOLO PICCARDO (President)
ROBERTO SPOTORNO (President Substitute)
the final schedule will be available on http://www.chimica.unige.it/didattica/orari_CTC
Oral with daily sessions of 12 students.
The ora exam corresponds to three questions, each answer maximum grade il 10, the sum of the three results makes the final grade
Three main topics: 1) General metallurgy (metallic bond, solidification, phase diagrams, solid state transformations, Fe-C diagram, microstructural features at the equilibrium); 2) Practical metallurgy (out of equilibrium diagrams, thermal treatments on steels, mechanical treatments, surface modifiations); 3) Characterization (metallography, mechanical tests)
The notations are from 18 to 30 on 30 . The special mention (con lode) is attributed when the whole exam is considered outstanding.