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Risorsa bibliografica obbligatoria
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Scheda Riassuntiva
Anno Accademico 2018/2019
Scuola Scuola di Ingegneria Industriale e dell'Informazione
Insegnamento 051581 - LABORATORY OF MECHANICAL METALLURGY
Docente Gerosa Riccardo
Cfu 8.00 Tipo insegnamento Monodisciplinare

Corso di Studi Codice Piano di Studio preventivamente approvato Da (compreso) A (escluso) Insegnamento
Ing Ind - Inf (Mag.)(ord. 270) - LC (485) MECHANICAL ENGINEERING - INGEGNERIA MECCANICA*AZZZZ051581 - LABORATORY OF MECHANICAL METALLURGY

Obiettivi dell'insegnamento

The goal of the course is to give the students high specialization in materials and damage phenomena. The course concentrates on ferrous and non-ferrous alloys, focusing the attention on the relation among the metallurgical and the microstructural characteristics and the mechanical properties, the toughness and the corrosion resistance. The topics are explained and discussed both according to the technical literature, both by examples of industrial cases. Didactic visits in some metallurgical and mechanical plants are planned to enable the students to match the theoretical aspects with the practical ones.

 


Risultati di apprendimento attesi

At the end of the course, the students:

  • know the most important metallurgic aspects of special and stainless steels and non-ferrous alloys
  • know the relation among the microstructural features and the mechanical performance of materials
  • know the main metallurgical aspects of hot forming
  • are able to apply the metallurgical knowledge in the failure analysis of mechanical components

 


Argomenti trattati
  • Plastic deformation of polycrystalline materials. Dislocation theory. Fracture. Types of fracture in metals. Metallographic aspects of brittle fracture. Dislocation theories of fracture. Ductile fracture. Brittle failure. Characteristic microstructural and morphological aspects.

  • Traditional and innovative methods for studying the tough-brittle behaviour of metallic materials (impact test, fracture mechanics). Fundamental issues on fracture mechanics. Brittle fracture and impact testing. Metallurgical factors affecting transition temperature. Influence of the alloying elements. Embrittlement phenomena (temper embrittlement, strain aging embrittlement, environment induced embrittlement)

  • Fatigue failure. Fracture mechanics applied to fatigue, morphology of the fracture surface, influence of the chemical composition, of the microstructure, of the surface conditions and of the environmental conditions. Corrosion fatigue. Fretting fatigue. Thermal fatigue. Examples of failure analysis.

  • Wear damage of the mechanical parts. Wear mechanisms: adhesive wear; tribo-oxidation; abrasive wear; contact fatigue. Wear processes: sliding wear; rolling wear; fretting; erosion. Wear tests. Engineering methods for prevention. Surface engineering: thermo-chemical treatments, surface coatings; surface analysis.

  • Creep and stress rupture. The high-temperature materials problem. The creep curve. Theories of low-temperature creep. Theories of high-temperature creep. Fracture at elevated temperature. Presentation of engineering creep data. Effect of metallurgical variables. Stress relaxation.

  • Mechanical behavior of metals during forming and forging. Recovery, static and dynamic recrystallization. Grain growth. Overaging.

  • Failure analysis and test methods: visual examination and optical microscope analysis, electronic microscope analysis, fractography, quantitative analysis, examples of failure analysis. Presentation of real cases of failure analysis

 

 

 

 


Prerequisiti

Students are required to know the basic principles of physical metallurgy, the equilibrium diagrams and the Fe-C diagram, the basic steel heat treatments and the CCT and TTT curves, the main mechanical tests and the fundamentals of steelmaking.


Modalità di valutazione

The final examination involves an oral discussion about the course contents. It will be evaluated:

  • the students’ knowledge of the course contents
  • the students’ ability to apply the studied topics to determine the cause of components failure
  • the students ability to apply the metallurgy knowledge to the mechanical performance of a component.
  • the students’ communication effectiveness.

Bibliografia
Risorsa bibliografica obbligatoriaG.Dieter, Mechanical Metallurgy
Risorsa bibliografica obbligatoriaG.Totten, Steel Heat Treatment: Metallurgy and Technologies
Risorsa bibliografica obbligatoriaMetals Handbook Collection, ASM

Forme didattiche
Tipo Forma Didattica Ore di attività svolte in aula
(hh:mm)
Ore di studio autonome
(hh:mm)
Lezione
52:00
78:00
Esercitazione
28:00
42:00
Laboratorio Informatico
0:00
0:00
Laboratorio Sperimentale
0:00
0:00
Laboratorio Di Progetto
0:00
0:00
Totale 80:00 120:00

Informazioni in lingua inglese a supporto dell'internazionalizzazione
Insegnamento erogato in lingua Inglese
Disponibilità di materiale didattico/slides in lingua inglese
Disponibilità di libri di testo/bibliografia in lingua inglese
Possibilità di sostenere l'esame in lingua inglese
Disponibilità di supporto didattico in lingua inglese
schedaincarico v. 1.6.5 / 1.6.5
Area Servizi ICT
20/10/2020