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2016　Mechanics of High Temperature Materials

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Academic unit or major
Graduate major in Mechanical Engineering
Instructor(s)
Sakaguchi Motoki 
Class Format
Lecture     
Media-enhanced courses
Day/Period(Room No.)
Thr3-4(S622)  
Group
-
Course number
MEC.C531
Credits
1
Academic year
2016
Offered quarter
1Q
Syllabus updated
2016/4/27
Lecture notes updated
-
Language used
English
Access Index

Course description and aims

High temperature materials are widely used for hot section components such as jet engine in aircrafts or gas turbine in power generation systems. For appropriate materials selection, strength design, maintenance and life prediction, it is important to accurately understand what kind of deformation and failure undergo in the material under high temperature condition. This course, at first, focuses on fundamental aspects of elastic-plastic deformation, creep process and mechanism of fatigue, thermal fatigue and thermo-mechanical fatigue in high temperature materials. Secondary, history and recent topics on strengthening mechanism and alloy design of high temperature materials are introduced, and some problems and challenges to damage evaluation and life prediction are explained.
This course aims to facilitate students’ understanding on what is unique under high temperature condition and what kind of deformation and failure undergo in the material. Topics include fundamental aspects of high temperature deformation and failure mechanisms as well as practical solutions for alloy design, damage evaluation and life prediction.

Student learning outcomes

At the end of this course, students will be able to;
1) explain severe conditions that high temperature materials have to experience,
2) explain fundamental mechanisms of deformation and failure under high temperature condition
3) explain damage evaluation and life prediction for high temperature materials according to the understanding on the deformation and failure mechanisms,
4) understand the basis of strength design of high temperature materials and explain recent practical problems in actual components.

Keywords

high temperature materials, metal, alloy, ceramics, deformation, failure, fracture, elastic deformation, plastic deformation, creep, fatigue, thermal fatigue, alloy design, strength design, damage evaluation, life prediction

Competencies that will be developed

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

Class flow

During the class, students are given exercise problems related to what is taught on that day to solve.

Course schedule/Required learning

  Course schedule Required learning
Class 1 What is "High temperature"? - Loads that high temperature materials have to experience - Damages that high temperature materials have to receive - Difficulties in mechanics of high temperature materials Understand engineering applications of high temperature materials and their operating conditions.
Class 2 Controlling factors in high temperature strength - Variety and application of high temperature metallic materials - Strengthening mechanism of high temperature materials Know variety and application of high temperature metallic materials employed in actual components.
Class 3 Materials deformation under high temperature - Tensile property under high temperature - Elastic and plastic deformation in high temperature materials - Creep deformation in high temperature materials Understand various deformation behaviors of high temperature materials.
Class 4 Elastic plastic fracture mechanics in high temperature materials - Near crack tip stress field and stress intensity factor - Elastic plastic fracture mechanics and creep deformation Confirm the essential of linear fracture mechanics and understand elastic plastic fracture mechanics taking account the creep deformation.
Class 5 Creep damage and fatigue damage - Creep deformation and creep crack growth - Cyclic deformation and fatigue crack growth Understand deformation and crack growth process under creep and cyclic deformation.
Class 6 High temperature fatigue and thermal fatigue - Cyclic deformation and time depending phenomena under high temperature - Deformation and failure under creep-fatigue condition - Thermal stress and thermal fatigue Understand creep-fatigue failure and thermal fatigue induced by thermal stress.
Class 7 Strengthening mechanisms and material design of high temperature materials - Strengthening mechanism of high temperature steels and their applications - Strengthening mechanism of Ni-base superalloys and their applications Understand the strengthening mechanisms and alloy design of high temperature engineering materials.
Class 8 Damage evaluation and life prediction for high temperature materials - Damage accumulation mechanism and life prediction methods - Damage evaluation and non-destructive detection Understand damage evaluation and life prediction methods for high temperature materials and know their current problems.

Textbook(s)

Specified by the academic supervisor as necessary.

Reference books, course materials, etc.

Specified by the academic supervisor as necessary.

Assessment criteria and methods

Students’ course score are based on exercise problems (50%) and final report (50%).

Related courses

  • MEC.C201 ： Mechanics of Materials
  • MEC.C211 ： Theory of Elasticity and Plasticity
  • MEC.C331 ： Strength and Fracture of Materials (Mechanical Engineering)
  • MEC.C431 ： Mechanics of Composite Materials
  • MEC.C432 ： Structural Integrity Assessment
  • MEC.C433 ： Solid Dynamics
  • MEC.C434 ： Sciences of Structural Safety and User's Security

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

No prerequisites are necessary, but enrollment in the related courses is desirable.

Contact information (e-mail and phone)    Notice : Please replace from "[at]" to "@"(half-width character).

Motoki SAKAGUCHI (sakaguchi[at]mep.titech.ac.jp)

Office hours

Contact by e-mail in advance to schedule an appointment.

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