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2022　Ferrous Materials I - Fundamentals of Iron and Steels

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Academic unit or major
Undergraduate major in Materials Science and Engineering
Instructor(s)
Takayama Masao  Kobayashi Satoru  Nakada Nobuo  Terada Yoshihiro 
Class Format
Lecture    (HyFlex)
Media-enhanced courses
Day/Period(Room No.)
Tue3-4(S8-101)  Fri3-4(S8-101)  
Group
-
Course number
MAT.M305
Credits
2
Academic year
2022
Offered quarter
1Q
Syllabus updated
2022/3/16
Lecture notes updated
-
Language used
Japanese
Access Index

Course description and aims

Why the steels are widely used in our society? How important the steels are to achieve a safe, reliable and sustainable society? How much the steels are produced? How the steels are produced? The key points to answer these questions are within the steels. This course, “Ferrous Materials I”, gives you the basics and principles of the physical metallurgy of iron and steels. The course, “Ferrous Materials II”, which is linked to this course, provides you opportunities to understand how the steels are produced based on the principles. Students will learn unique characteristics of iron and steels to produce a variety of properties that you want to give through studies on the basis of metallurgy such as phase diagram and phase transformation.

Student learning outcomes

Students will be able to:
1) Understand iron-carbon equilibrium phase diagrams, phase transformations in plain carbon steels and normalized microstructures formed through the phase transformations.
2) Understand the effects of alloying elements on the equilibrium phase diagrams, the phase transformations and microstructure evolutions in steels.
3) Understand the excellent heat treatability of steels to control microstructures, the microstructures being the decisive factor for the mechanical properties of steels, and these points making it possible to use the steels in a variety of applications.

Keywords

Phase diagram, phase transformation, crystal structure, normalized microstructure, time-temperature-transformation diagram, continuous-cooling-transformation diagram, martensitic transformation, bainitic transformation, the tempering of martensite, The effect of alloying elements

Competencies that will be developed

✔ Specialist skills ✔ Intercultural skills Communication skills Critical thinking skills ✔ Practical and/or problem-solving skills

Class flow

Students are recommended to study the part of each lecture in advance.
Questionnaires will be given in each lecture to assist your understanding.

Course schedule/Required learning

  Course schedule Required learning
Class 1 Iron is a gift from God. How fantastic Iron is！！ Understand what iron is about and how attractive/important for civilization
Class 2 Mystery of pure iron Learn the crystal structures, the unique phase transformations and the phase diagram of iron
Class 3 In-depth understangings of Fe-C binary phase diagram Learn the fundamentals of steels (Fe-C alloys) through Fe-C phase phase diagrams. If you mis this lecture, you cannot keep up with the following lectures. Understand the iron-cementite and iron-graphite equilibrium diagrams.
Class 4 The standard microstructures and their formation processes of the steels Understand the typical microstructures and their formation processes of steels based on the binary phase diagram
Class 5 Review and exercise, and general discussion/level check Understand the time-temperature-transformation (TTT) diagrams and how to construct it.
Class 6 Time-temperature-transformation (TTT) diagram Understand the continuous-cooling-transformation (CCT) diagrams and how to construct it.
Class 7 Midterm exam Check the level of understanding up to now, and discusison
Class 8 What is Martensite? - the features and structure - Learn what the features and structure of martensite are about
Class 9 What is Martensite? - the phase transformation and crystallography - Learn what the martensitic phase transformation is through crystallography
Class 10 Tempered Martensite and microstructures Learn the microstructure evolution of tempered martensite　during heat treatments
Class 11 Phase diagrams of alloyed steels Understand the effect of alloying elements on phase　diagram in steels. particularly paying attention to the phase stability between bcc Fe and fcc Fe.
Class 12 The tempering of martensite and the formation of carbides in alloy steels Understand how the alloying elements affect the γ to α phase　transformation and the mechanism, in comparison with those in the binary Fe-C system.
Class 13 Microstructure evolution of tempered martensite of alloyed steels during heat treatment Learn the methods to control microstructure by tempering the alloyed steels.
Class 14 Microstructure design principle of high-strength steels Learn how to control the microstructures to design high-strength steels

Out-of-Class Study Time (Preparation and Review)

To enhance effective learning, students are encouraged to spend approximately 100 minutes preparing for class and another 100 minutes reviewing class content afterwards (including assignments) for each class.
They should do so by referring to textbooks and other course material.

Textbook(s)

講座・現代の金属学 材料編４　『鉄鋼材料』　日本金属学会

Reference books, course materials, etc.

谷野満，鈴木茂著　『鉄鋼材料の科学』　内田老鶴圃

Assessment criteria and methods

Questionnaires and midterm excersize: 50%
Final examination: 50%

Related courses

  • MAT.M306 ： Ferrous Materials II - Principles for Applications

Prerequisites (i.e., required knowledge, skills, courses, etc.)

None required.

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