Mechanical Metallurgy Stefano Spigarelli
The student should know some fundamentals of Chemistry (atomic bond), Metallurgy (steels), Mechanical Design (nature of mechanical properties and their role) and Material Processing Technology
Crystals structures (fcc, bcc and hcp); indexing planes and directions; defects in metals, liquid-solid trasformations, solidification in non-equilibrium conditions, steel transformations. vacancies, dislocations and grain boundaries. Dislocation interaction, bowing of dislocations, dislocation sources. Stress and strain in mono- and poly-crystals. Strenghtening mechanisms (cold working, solid solution, grain refining, precipitation hardening). Fatigue and fracture. Atomic diffusion in metals; recovery and recrystallization; high temperature deformation, creep, superplasticity and diffusion bonding. Metallurgical features of fusion welding. case studies: microstructure control in rolling, hardening mechanisms in Dual Phase, TRIP, Bake hardening, Maraging and Hadfield steels, welding of steels and light alloys. The experimental part will include studies on the heat treatments and welding of steels and light alloys.
Development of the examination
LEARNING EVALUATION METHODS
The method for learning evaluation will consist in an oral examination. Each student will be given the chance to enhance learning by self-assesment tests to be accried out in the moodle page of the course.
LEARNING EVALUATION CRITERIA
The candidate will be required to be able to analyise the nature of the mechanisms governing the mechanical properties in metals. The student must be able to qualitatively and/or quantitatively estimate the effect of microstructural features on the required properties.The same subjects will be considered in the self-assessment tests. During the oral examination, the candidate should exhibit a proper knowledge of the course contents..The student must be able to coherently describe concepts introduced during the course and to combine these concepts to solve simple problems describing the effects of microstructure on engineering properties.
LEARNING MEASUREMENT CRITERIA
Grading scheme is based on a scale of 30 points. Successful completion of the examination will lead to grades ranging from 18 to 30.
FINAL MARK ALLOCATION CRITERIA
Maximum grade obtained in the oral examination will be 30 points.Completion of a report illustrating the results of the experimental activity will be evaluated with a maximum of 2 points.
G.Dieter, Mechanical Metallurgy
- Ingegneria Meccanica (Corso di Laurea Magistrale (DM 270/04))