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Engineering Online

NE 795 High Temperature Deformation of Materials

3 Credit Hours

(also offered as MSE 791)

The course is intended to introduce students to theories of high temperature deformation and creep along with their applications in materials design. Various phenomenological models along with creep theories will be dealt with emphasis on high temperature deformation of metals (alloys) and ceramics.

Prerequisite

MSE420-Mechanical Properties of Materials or NE409/509-Nuclear Materials or equivalent.

Course Objectives

By the end of the course, the student will be able to:

  • describe the various deformation mechanisms that take place under given stress and temperature- required for proper design of structures
  • calculate the failure times due to creep
  • estimate the damage accumulated in a material in a given structure, and thus the remaining useful life of the structure made of these materials
  • explain why a specific material was chosen for a given application
  • identify problems (materials related with emphasis on mechanical and fracture) encountered in structures in technologies (aerospace, automotive, chemical, nuclear, electronic, etc.)
  • choose the best and optimum material for a given application
  • compare two competing materials for a given application
  • predict the reliability (dimensional stability) of a given component
  • outline procedure(s) for detecting the problems and suggest plausible remedial solutions
  • distinguish between various effects resulting in the deterioration of a given component in-service due to applied loads and temperatures

Course Outline

  1. General Aspects of Time Dependent Plastic Flow
  2. Phenomenological Description of Plastic Deformation (Zener-Holloman and Sherby-Dorn Parameters, Sherby and Dorn equations, Monkman-Grant Relation, Concept of effective diffusivity)
  3. Theories of Creep [Diffusion, Harper-Dorn, Climb, Glide (solid solution alloys), GBS, Superplasticity]
  4. Deformation Mechanism Maps (Ashby and Langdon-Mohamed)
  5. Applications of Deformation Mechanism Maps [turbines, nuclear reactor components, metal forming and shaping, polar ice cap, olivine (upper mantle), etc]

Course Requirements

Homework assignments, tests (take home) and term-long project with a final report.

Textbook

References and monographs.

Updated 10/26/2020