Unit MATERIALS SCIENCE AND TECHNOLOGY
- Course
- Industrial engineering
- Study-unit Code
- 70076112
- Curriculum
- In all curricula
- Teacher
- Luigi Torre
- CFU
- 12
- Course Regulation
- Coorte 2022
- Offered
- 2023/24
- Type of study-unit
- Obbligatorio (Required)
- Type of learning activities
- Attività formativa integrata
MATERIALS SCIENCE AND TECHNOLOGY A
| Code | 70678007 |
|---|---|
| CFU | 7 |
| Teacher | Luigi Torre |
| Teachers |
|
| Hours |
|
| Learning activities | Caratterizzante |
| Area | Ingegneria dei materiali |
| Academic discipline | ING-IND/22 |
| Type of study-unit | Obbligatorio (Required) |
| Language of instruction | Italian |
| Contents | Introduction and material selection criteria Chemical bonds Crystalline structures imperfections in the crystals Diffusion stress-deformation curve Mechanical properties Fracture fatigue creep Composites |
| Reference texts | Smith Ashemi, Scienza e Tecnologia dei Materiali V ed, Mc Graw Hill |
| Educational objectives | The course will enable the student to know the main properties of engineering materials, and to relate them to their structure and their manufacturing processes. Furthermore, the student will be introduced to the characteristics, the main properties and the production processes of the main classes of materials |
| Prerequisites | Chemistry Physics and Math |
| Teaching methods | Frontal lectures and exercise |
| Learning verification modality | Esame scrtto ed orale, esoneri. |
| Extended program | CHEMICAL BONDS -Introduction to Chemical Bonds, Primary and secondary bonds,-Ionic bond,-Covalent bond, Metallic bond, Secondary bonds. CRYSTALLINE STRUCTURES: -Elements of crystalline structures Simple cubic, Body centered cubic, Compact hexagonal, Polymorphic crystals, Density of materials, , Crystal planes and Miller index -directions, Volumetric-planar-linear density, Bragg’s Law, Solidification, -nucleation, crystalline grains, solidification of single crystals. IMPERFECTIONS IN CRYSTALS: introduction to defects, point defects, line defects, theoretical cohesion forces, dislocation movement, surface defects, twinning, overlapping defects, grain size. DIFFUSION: factors that control it and processes involved, interstitial diffusion, self-diffusion, Arrhenius equation, stationary diffusion (1st Fick's law), non-stationary diffusion (2nd Fick's law), effect of temperature, grain boundary diffusion, grain boundary diffusion, diffusion of nonmetallic solids. STRESS-DEFORMATION CURVE: -s-e diagram for ductile materials -s-e diagram for brittle materials. strain: engineering, true, relationships, Poisson's ratio shear strain, stress: engineering, true, relationships - Hooke's law, temperature effect, introduction, PLASTIC DEFORMATION AND HEAT TREATMENTS -introduction, slip systems, plastic deformation of single crystals - resolved shear stress, difference between creep and twinning, plastic deformation of polycrystalline, annealing, recovery, recrystallization, grain growth BINDERS AND COMPOSITES aerial binders, stiffening process, aerial lime, quicklime, quenching of hydraulic binders: Portland cement, cement hydration, alterations, pozzolanic cement. MECHANICAL PROPERTIES, Ductility, Resilience, Effects of structural changes, Effect of temperature, Toughness, Hardness and hardness tests, Metal failure, Stress concentration, Safety factors, Friction and wear. FRACTURE Griffith Theory, Stress at Crack Tip, Stress Factor, Toughness Test, Calculation of K, Plastic Zone. Influence of Y.S., Specimen Thickness, Test Procedures, Influence of Microstructure. CREEP:, Creep tests and creep curves, Consequence of creep and creep fracture, Creep resistant materials, Dislocation creep, Diffusion creep, Diagrams of deformation mechanisms, Applications FATIGUE Introduction and types of fatigue, Life and fatigue life, Crack initiation and growth, main factors, Uncracked components, Cracked components |
| Obiettivi Agenda 2030 per lo sviluppo sostenibile | 9 |
MATERIALS SCIENCE AND TECHNOLOGY B
| Code | 70678105 |
|---|---|
| CFU | 5 |
| Teacher | Debora Puglia |
| Teachers |
|
| Hours |
|
| Learning activities | Caratterizzante |
| Area | Ingegneria dei materiali |
| Academic discipline | ING-IND/22 |
| Type of study-unit | Obbligatorio (Required) |
| Language of instruction | Italian |
| Contents | The course deals with the general aspects of production processes, mechanical and functional properties and material selection criteria. The bonds and microstructural properties of steel and metal alloys, ceramic materials, binders, plastics, adhesives, glass and composite materials are deepened. |
| Reference texts | - William F. Smith : “SCIENZA E TECNOLOGIA DEI MATERIALI” Ed. McGraw Hill, 2004 W.D:Callister: “SCIENZA E INGEGNERIA DEI MATERIALI” EdiSES-Napoli 2003 |
| Educational objectives | Acquisition of Fundamental Knowledge on Materials Science. Basic principles of structure and physical properties of metals, polymers, ceramics and composites. Some considerations on property-structure relations of materials. Provide tools for understanding the main physico-chemical properties of materials for designing structures and / or devices |
| Prerequisites | Basic knowledge of chemistry, physics and mathematics. |
| Teaching methods | The course is articulated in frontal lectures with the help of Powerpoint presentations + exercises |
| Other information | |
| Learning verification modality | Written exam + oral exam |
| Extended program | Diagram of pure substances, phase rule, isomorphic binary alloys, lever rule, non-equilibrium solidification, homogenization, partial solubility, eutectic reaction, Peritectic alloys, monothectic alloys, eutectoid alloys. DIAGRAMS FOR NON-EQUILIBRIUM DIAGRAMS, Fe-C AND HEAT TREATMENTS: cast iron and steel, Fe-Fe3C diagram, heat treatments: martensite, TTT diagrams, CCT diagrams, annealing, normalization, hardening, recovery. PLASTIC DEFORMATION AND HEAT TREATMENTS: introduction, sliding systems, plastic deformation of monocrystalline, resolved shear stress, the difference between scrolling and gemination, plastic deformation of polycrystalline materials, annealing, recovery, recrystallization, grain growth. ELECTRICAL PROPERTIES: electrical conduction in metals, semiconductors, intrinsic and extrinsic semiconductors, dielectrics. MAGNETIC PROPERTIES: magnetic materials, magnets, types of magnetism, T effect on ferromagnetism, ferromagnetic domains, hysteresis loops, permanent magnetic materials, superconductors. WET and DRY CORROSION: introduction, electrochemical corrosion in metals, galvanic cells, factors that affect the corrosion, corrosion rate, polarization, passivation, forms of corrosion, oxidation of metals, corrosion protection CERAMIC MATERIALS AND GLASSES: introduction, chemical bonds in ceramic, basic structural relationships, structures of the oxides, silicate structures, machining of ceramic, mechanical properties, thermal properties, the glass structure. Air and hydraulic binders. Concrete. Introduction to COMPOSITE MATERIALS |
| Obiettivi Agenda 2030 per lo sviluppo sostenibile | This course contributes to the realisation of the UN goals of the 2030 Agenda for Sustainable Development |