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PORTALE DELLA DIDATTICA

Materials for mechanical industries

01NMEQD, 01NMEMW

A.A. 2020/21

2020/21

Materials for mechanical industries

Materials for mechanical industries

The subject aims to provide more advanced and complementary knowledge related to metallic materials and their application in the mechanical industry than those provided in the first level courses of Italian universities. In particular, in the teaching of Science and technology of materials / Technology of metallic materials of this University. These are fundamental knowledges in the profession of a mechanical engineer. The teaching places particular emphasis on the understanding of the interdependence between the choice of a metallic material and the design of its working cycle: choice and design are conditioned by the desired and requested properties in working conditions; therefore, the following inherent aspects are dealt with, in particular concerning the metallic materials, together with the reciprocal correlations: 1) Principles of physical metallurgy and thermodynamics; 2) Manufacturing, heat treatment and mechanical processes; 3) Structures, microstructures and their properties; 4) Performance on site (mainly mechanical but also electromagnetic, thermal and in the presence of corrosion).

Materials for mechanical industries

Materials for mechanical industries

Knowledge of thermodynamics and theory of solid-state transformations. Knowledge of the fundamental principles of mechanical properties, in the presence of corrosion, thermal, electrical and magnetic of metallic materials. Knowledge of the main technologies of production, manufacture and transformation of steels and other metallic materials. Specific knowledge concerning the following categories of materials: high strength weldable steels, cast irons, stainless steels, tool steels, aluminum alloys, titanium alloys, others. The students acquire the ability to understand and know the problem concerning the engineering materials choose for the different fields of applications, with a critical approach.

Materials for mechanical industries

Materials for mechanical industries

Basic knowledge of Physics, Chemistry, structural Mechanics, science and technology of metallic materials.

Materials for mechanical industries

Materials for mechanical industries

Powder metallurgy technology. Powders (types and properties), compacting pressing (materials classes, types of dies, methods), sintering (furnaces, atmospheres, operating conditions, mechanism) post-treatments, products. Corrosion. Anodic and cathodic behavior. Oxygen, temperature and solution concentration influences. The different types of corrosion. Galvanic corrosion coupling different materials or in case of different phases. Active and passive behavior of stainless steels. Protection methods of metallic materials. Stainless steels. Schaeffler and De Long diagram. Stainless steels classes and designation. Heat treatment, welding, deformability and tool work-ability. Surface finishing. Sanification. Metallic ions release. Tool steels. Cold and hot working classes. Heat treatment and tempering parameters. High speed steels. Deep drawing steels and aluminum alloys for "Body in White" car components. Surface coating technologies and materials. Titanium alloys. Grades, alloying elements, phase diagrams, properties, heat treatments, influence of microstructure. Applications and products. Metallic materials microstructure and failure analysis: fracture modes and morphologies. Overview of cellular materials, applications. Metal foams with open and closed cells. Elastic and plastic compression behavior, density effect. Absorption of energy during the impact.

Materials for mechanical industries

Materials for mechanical industries

Materials for mechanical industries

Lectures in class (uploaded on the Portale della Didattica), numerical and graphical practice in teams on several themes subjects of the subject. Laboratory of metallurgy, optical and electronic microscopy, x-Ray diffractometric analyses, chemical analyses with small groups of students.

Materials for mechanical industries

Materials for mechanical industries

Materials for mechanical industries

Following texts and lecture notes, uploaded on the "Portale della Didattica". G. Krauss, "Steels, Processing, Structure, and Performance", 2nd ed., ASM International F.C. Campbell, "Elements of Metallurgy and Engineering Alloys", ASM International H. Bhadeshia ed H. Honeycombe, "Steels: Microstructure and Properties", Butterworth-Heinemann ASM Metals Handbook X Ed.

Materials for mechanical industries

ModalitÓ di esame: Prova scritta a risposta aperta o chiusa tramite PC con l'utilizzo della piattaforma di ateneo Exam integrata con strumenti di proctoring (Respondus);

Materials for mechanical industries

Materials for mechanical industries

Exam: Computer-based written test with open-ended questions or multiple-choice questions using the Exam platform and proctoring tools (Respondus);

Materials for mechanical industries

Knowledge and understanding of the following items: - Knowledge of the production technologies of engineering materials, knowledge of the application characteristics required for the most common engineering materials. - Knowledge of forming methods, and consequent characteristics imprinted on the material. Knowledge of the influence of the crystal lattices, chemical composition and influence of the binding elements. - Knowledge of the influence of microstructural modifications and physical and chemical characteristics as temperatures vary and influence of the heating and cooling rate on the microstructural and mechanical characteristics of materials. - Knowledge of the interaction with the working environment (atmosphere, vapors, liquids) of the main alloys.

Materials for mechanical industries

ModalitÓ di esame: Prova scritta a risposta aperta o chiusa tramite PC con l'utilizzo della piattaforma di ateneo Exam integrata con strumenti di proctoring (Respondus);

Materials for mechanical industries

Materials for mechanical industries

Exam: Computer-based written test with open-ended questions or multiple-choice questions using the Exam platform and proctoring tools (Respondus);

Materials for mechanical industries

The final exam aims to verify the acquisition of knowledge and objective teaching skills (described in the Expected learning outcomes field) through a written test consisting of 14 questions in total, 2 of which are open-ended, 7 single-answer or multiple one, 3 correspondences, 2 calculations relating to all the topics of the lessons and workshops. The evaluation of the paper is expressed in thirtieths and it is made considering a) the correctness of the answers, b) the relevance of the information provided, c) the ability to respond clearly, precisely and rationally, adequately motivating the arguments produced. The time available to the student for the written test is 50 minutes and it is not possible to consult teaching materials or notes or other texts. The student can only use the stapled sheets provided by the teacher. The final mark is composed of the evaluation of the written and, by free decision of the teacher, in the case in which it is appropriate to deepen it, by the vote of a possible oral test (which can change the mark both for positive and negative). Any oral part of the exam must be taken in the appeal in which the written exam was passed. These rules apply to both the written and online exam.

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