2021 Reliability and Durability of Metals and Alloys

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Academic unit or major
Graduate major in Materials Science and Engineering
Kobayashi Equo  Kobayashi Satoru  Kumai Shinji 
Course component(s)
Lecture    (ZOOM)
Day/Period(Room No.)
Mon3-4()  Thr3-4()  
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Academic year
Offered quarter
Syllabus updated
Lecture notes updated
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Course description and aims

Reliability and durability are highly required in use of metallic materials for structural applications such as automobiles, airplanes and thermal power plants etc. This course first gives an introduction of fracture of metallic materials in real applications and fracture manners. The introduction is followed by basic lectures on fracture mechanics, fatigue and creep deformation which are important phenomena in terms of reliability and durability of metallic materials. In the lectures on fatigue you will study S-N curves, and nucleation and propagation of cracks. In the lectures on creep deformation students will learn high temperature deformation mechanisms and design principle of the materials for improved durability.

Student learning outcomes

Students will be able to:
1) Understand the importance of reliability and durability of metallic materials for structural applications.
2) Understand the basics of fracture toughness and its importance in terms of reliability of metallic materials.
3) Understand the basics of fatigue and creep deformation and its importance in terms of the durability of metallic materials.
4) Understand how to design, select and test metallic materials to be used for structural applications.


Creep deformation, Strengthening mechanisms, Degradation of microstructure, Heat resistant alloys/steels

Competencies that will be developed

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

Class flow

The classes in this course contain quizzes and exercises to understand the contents.

Course schedule/Required learning

  Course schedule Required learning
Class 1 General introduction of reliability and durability of metals and alloys, Characteristics of fracture and fracture manner in metallic materials Overview reliability and durability of metals and alloys and understand characteristics of fracture and fracture manner.
Class 2 S-N curve and fatigue limit Understand S-N curve and fatigue limit.
Class 3 Fatigue crack initiation and propagation Understand fatigue crack initiation and propagation.
Class 4 Fatigue life prediction Understand fatigue life prediction.
Class 5 Fracture mechanics I - Mechanics of crack Understand fracture mechanics.
Class 6 Fracture mechanics II - Parameters of fracture mechanics To understand parameters of fracture mechanics.
Class 7 Fracture toughness Understand fracure toughness and it evaluation.
Class 8 Achievement evaluation and general practice (1) Understand fracture and fatigue of metals and alloys.
Class 9 Creep deformation, creep strength, allowable stress and creep tests Understand creep deformation, creep strength, allowable sterss and creep test methods.
Class 10 High temperature deformation mechanisms Understand high temperature deformation mechanisms.
Class 11 Dislocation creep mechanism I (Phenomenology and elementary process) Understand dislocation creep mechanisms in terms of phoenomenology and atomic processes.
Class 12 Dislocation creep mechanim II (Strengthening mechanisms) Understand strengthening mechanisms in dislocation creep mechanisms.
Class 13 Creep strength vs. microstructure relationship and design of heat resistant alloys Understand creep strength vs. microstructure relationships and how to design heat resistant alloys for particular high temperature applications.
Class 14 Achievement evaluation and general practice (2) Understand creep phenomenon and high temperature deformation

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.


No textbook is set.

Reference books, course materials, etc.

Zairyo-kyodo-gaku: Kato, Kumai, Onaka (Asakura shoten)

Assessment criteria and methods

Questionnaire and achievement examinations will be evaluated.
The criteria of credit: 60 points and higher

Related courses

  • MAT.M303 : Lattice Defects and Dislocation

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

None required.

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