DOKUZ EYLUL UNIVERSITY FACULTY OF ENGINEERING OFFICE OF THE DEAN COURSE / MODULE / BLOCK DETAILS ACADEMIC YEAR / SEMESTER. Course Code: MME 2006

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1 Offered by: Metalurji ve Malzeme Mühendisliği Course Title: PHASE DIAGRAMS Course Org. Title: PHASE DIAGRAMS Course Level: Lisans Course Code: MME 006 Language of Instruction: İngilizce Form Submitting/Renewal Date 01/04/01 Weekly Course Hours: Course Coordinator: PROFESÖR AHMET ÇAKIR Theory Application Laboratory National Credit: 0 0 ECTS Credit: 5 R

2 Offered to: Course Status: Compulsory/Elective Name of the Department: Metallurgical and Materials Engineering Metallurgical and Material Engineering Scientific Preparatory (Phd) Metallurgical and Material Engineering Scientific Preparatory (Msc) Required Course Required Course Required Course R

3 Instructor/s: R

4 Course Objective: The objectives of this course are to provide students with the following competencies: 1.Understanding the concept of free energy in structuring the phase diagrams under equilibrium..understanding the application of the phase rule to one, two-, three-component system.. Knowledge of crystallization paths and their application to practical problem solving. 4. Understanding the use of lever rule in calculating amounts of phases in practical problems involving various invariant points. 5. Reading and analysing composition triangle in thernary phase diagrams. Learning Outcomes: Understand the importance of temperature, pressure and composition in state of equilibrium associated with the Gibbs free energy. Students should be able to construct and interpret single and two component phase diagrams and account for their main features Describe the use of phase diagrams in the equilibrium and non-equilibrium cooling condition and the final microstructures of cast and heat treated binary alloys. Understand the effect of solubility on structuring phase diagrams in binary and thernary systems. Calculate the amount of the phases and understand phase changes at the invariant points for unary, binary and ternary systems. Understand the importance of congruent and incongruent melting in forming phase diagrams in ternary systems. Construction of phase diagrams by using free energy as a function of temperature and cooling curves Understand the Importance of relationship between phase rule and -degree of freedom and the effect of temperature and pressure on allotropic transformation. Learning and Teaching Strategies: Oral and visual presentation, discussions, problem solving Assessment Methods: Name Code Calculation formula

5 1.Vize.Vize Final Bütünleme Notu BNS Bütünleme Sonu Başarı Notu VZ1 VZ FN BUT BNS BBN VZ1 * 05 + VZ * 05 + FN * 050 VZ1 * 05 + VZ * 05 + BUT * 050 Further Notes about Assessment Methods: Lecture presentation will be provided in class room in line of the course content and discussion regarding topics presented will be held. Problem solving will be presented in relation to the appropriate subjects included in curriculum Assessment Criteria: 1. Identify number, composition, proportion and structural arrangement of phases in binary alloys.. T-P-G diagrams in unary, binary and ternary component systems. Structuring composition-temperature phase diagrmas by use of free energy change as a function of temperature. 4. Le Chatelier Principle and Clasius-Clapeyron Equation and its implementation 5. Describe structural changes due to varying proportion of alloying elements and temperature. 6. Describe the phase changes and final microstructures of binary alloys cooled under equilibrium conditions from the melt or during heat treatment operations. 7. Compute the amount of phases existing at different temperature levels in binary and thernary systems. 8. Describe the final microstructure involving phase transformations at different invariant points such as eutectic, eutectoid, peritectic, peritectoid ect. Textbook(s)/References/Materials: Textbook(s):. Phase Transformation in Metals and Alloys, David, A Porter,Kenneth, E Easterling,, Chapman and Hall, , UK, 1997 Supplementary Book(s): 1. Principles of Phase Diagrams in Materials Systems,Paul Gordon,,,McGraw-Hill Book Campany, ,USA,1968. Introduction to Phase Equilibria in Ceramic Systems, Floyd, A Hummel,,, Marcel Dekker, Inc., , USA, 1984

6 Course Policies and Rules: Lecture presentation will be provided in class room in line of the course content and discussion regarding topics presented will be held. Problem solving will be presented in relation to the appropriate subjects included in curriculum. Contact Details for the Instructor: Prof. Dr. Ahmet ÇAKIR Dokuz Eylül University, Faculty of Engineering, Metalurgical and Materials Engineering Tınaztepe Campus, 5160 Buca / İZMİR Tel ahmet.cakir@deu.edu.tr Prof. Dr. Ali Aydın Göktaş Dokuz Eylül University, Faculty of Engineering, Metalurgical and Materials Engineering Tınaztepe Campus, 5160 Buca / İZMİR Tel aydin. goktas@deu.edu.tr Office Hours: On Fridays btw. 09:00-10:00 am Course Outline: Week Topics: Notes: 1 Basic principles of thermodynamics in association with phase diagrams: System, component, phase and equilibrium concepts. Equilibrium concept in unary and binary systems. 4 5 Unary and binary phase diagrams and their derivation using the associated free energy curves at different temperature as a function of composition.. Equilibrium phase diagrams in ideal two-phase systems, phase rule, Clausius-Clapeyron equation. Partial and continuous solid solubility in binary

7 systems The lever rule, partial and intermediate solid solutions. I st Interm Exam. Examples of phase analysis for eutectic, eutectoid, peritectic and peritectoid reactions. Fe-C phase diagrams, analysis of phase transformation, application of phase and lever rules at various compositions and temperatures. Eutectic, eutectoid, peritectic and peritectoid reactions in binary phase diagrams; stable and metastable liquid immiscibility, spinodal decomposition. Indication of components and crystallization in three-phase systems with and without a solid solution, eutectic, eutectoid and peritectic reactions. Congruent-incongruent melting and crystallization in ternary systems with eutectic and peritectic reactions, II nd Interm Exam. Ternary phases with congruent and incongruent melting; Application of the lever rule, phase equilibrium tie-lines and composition triangles, immiscibility in ternary systems. II nd Interm Exam

8 ECTS Table Course Activities Number Duration Total Work (hour) Load (hour) In Class Activities Lectures 14 4 Exams Midterm 4 Final 1 Out Class activities Preparations before/after weekly lectures 14 4 Preparation for midterm exam 10 0 Preparation for final exam Total Work Load (hour) ECTS Credits of the Course= Total Work Load (hour) /