Learning objectives
Knowledge and ability to understand: through the frontal lessons learned during the course, the student will acquire the methods and knowledge about the plastic deformation mechanisms that determine the mechanical behavior of metallic materials at different working temperatures and on recent methods of manufacturing metal components such as additive manufacturing. Ability to apply knowledge and understanding:through practical classroom or laboratory exercises related to some topics in the program, students learn how to apply knowledge acquired in a real context of industrial issues.Judgment autonomyThe students must be able to understand and critically evaluate the link between microstructural and process parameters so that they can simulate deformation process even under unmanaged operating conditions. They also want to give directions on the choice of innovative production technologies for the production of metal components. Communication skillsThrough the frontal lessons and the comparison with the teacher, the student acquires the specific lexicon of mechanical metallurgy. It is expected that at the end of the course, the student will be able to transmit, in oral and written form, the content of the course and the problems of mechanical metallurgy.Learning abilityThe student who has attended the course will be able to deepen his / her knowledge in the field of mechanical metallurgy through the autonomous consultation of specialized texts, scientific or divulgative journals, even outside lecture topics, in order to effectively address entering into the labor market or undertaking further training paths
Prerequisites
Metallurgy skills.
Course unit content
The course proposes the study of plastic deformation mechanisms that affect the mechanical behavior of metallic materials at various temperatures. Part of the course will be devoted to understanding the structures obtained from innovative welding technologies, foundry, powder metallurgy and additive manufacturing and the relationship with their mechanical behavior.
Full programme
Outline of metal structures, deformation of crystal lattices and tensile strength. Deformation of metals at high temperatures: recalls of diffusive processes, recovery and recrystallization phenomena; typical stress-strain curves; constitutive equations of process and microstructural parameters in hot deformation; case study on magnesium alloys. Creep of metals: tests, theoretical formulation, methods to increase the creep resistance of metals; case study on nickel superalloys. The superplasticity of metals: characteristics, microstructural requirements, equations; superplastic forming for Diffusion Bonding; thermomechanical methods to obtain an ultrafine grain structure; case studies on steels and light alloys for automotive and aeronautical applications. Welding metallurgy: hints on the types of welding; solidification and microstructure, properties and problems of the joint areas; case studies of steels and light alloys. Powder metallurgy: characteristics of metal powders; production phases; mechanical characteristics of the components; applications. Additive manufacturing of metal components: microstructure and properties of metal components produced by powder-bed fusion technology; case study of Al-Si and Ti6Al4V alloys.
Bibliography
The slides projected during the course are made available to students in pdf format at Elly web site. following texts are recommended for the study of the topics discussed in the course: i) R. W. Hertzberg, Deformation and Fracture of Engineering Materials, Fourth ed, John Wiley & Sons, (1996); Ii) G.L. Dieter, Mechanical Metallurgy, 3rd edition (1986), McGraw-Hill Book Company, New York
Teaching methods
The course is held in 6 CFUs, that correspond to 48 hours of lesson. The didactic activities will be carried in frontal classroom lessons. The topics of the course will be addressed from a theoretical point of view, to improve the understanding of the issues in detail. Exercises / lab will be conducted on samples obtained by innovative technologies and hardness measures.
Assessment methods and criteria
The exam is a written test, composed of three-four questions related to the theoretical contents and / or exercises carried out during the course. The test is passed if the grade is at least 18/30. The grade ’30 cum laude’ is granted when the maximum score is achieved and a strong command of the discipline therminology is demonstrated.
Other information
- - -
