This course will address the influences of temperatures on the behavior and properties of materials.
I treat this course as a primer on the selection and design of materials for use in high temperature structural applications.
We will discuss Ni-based superalloys and stainless steels in detail as they are well understood models for the design if high temperature materials. We will also discuss relevant issues in refractory and ceramic materials.
The primary emphasis will be on establishing links between microstructures and properties. We shall also address processing to a certain extent.
COURSE CONTENT
Lecture |
Date |
Lecture Topic |
Assignment |
--- |
1/11 |
Introduction |
|
1 |
1/18 |
Creep Deformation |
|
2 |
1/23 |
Stress Dependence of Creep; Creep in Polycrystalline Materials |
|
3 |
1/25 |
Grain Boundaries, Tertiary Creep; Methods of Measuring Creep |
|
4 |
1/30 |
Deformation Mechanism Maps |
|
5 |
2/1 |
Cyclic Stress – Fatigue |
|
6 |
2/6 |
Life Prediction Modeling |
|
7 |
2/8 |
High Temperature Oxidation |
|
8 |
2/13 |
High Temperature Oxidation/Hot Corrosion |
|
9 |
2/15 |
Hot Corrosion/Corrosion Erosion |
|
--- |
2/20 |
EXAM 1 |
--- |
10 |
2/22 |
Alloy Design (First Research Paper Due) |
|
11 |
2/27 |
Phase Stability at High Temperatures; Requirements for High Temperature Materials Systems |
|
12 |
2/29 |
Iron Base Alloys/ Iron Nickel Base Alloys |
|
13 |
3/5 |
Cobalt Base Alloys |
|
14 |
3/7 |
Nickel Base Alloys |
|
--- |
3/12 |
SPRING BREAK (NO CLASSES) |
--- |
--- |
3/14 |
SPRING BREAK (NO CLASSES) |
--- |
15 |
3/19 |
Coating Systems |
|
16 |
3/21 |
Refractory Metal Alloys, Titanium Alloys |
|
17 |
3/26 |
Intermetallic Systems |
|
18 |
3/28 |
Titanium Aluminides, Nickel Aluminides |
|
--- |
4/2 |
EXAM 2 |
--- |
19 |
4/4 |
High Temperature Composites |
|
20 |
4/9 |
Alloy Chemistry and Purity, Melting & Refining |
|
21 |
4/11 |
Casting of Superalloys, Single Crystal Processing |
|
22 |
4/16 |
Deformation and Powder Processing of Superalloys (Second Research Paper Due) |
|
--- |
4/18 |
EXAM 3 |
--- |
23 |
4/23 |
DEAD WEEK: Ceramics and Other High Temperature Materials |
|
24 |
4/25 |
DEAD WEEK: Review of Course |
|
--- |
5/2 |
FINAL EXAM – 7:00 PM – 9:30 PM |
|
Grading
| Item | Percentage |
|---|---|
| Each exam counts 15% | 45% |
| Each research paper counts 12.5% | 25% |
| Class participation (includes HW problems) | 5% |
| Final Examination | 25% |
| TOTAL | 100% |
Research Papers
Each research paper is to be a critical literature review of the topic selected. This means that you are to consult at least twelve (12) original papers on a subject. You may include two review papers in the review, but you are expected to read the original papers. A critical review means that you are to comment on the validity of the papers, and on their value to the field. This means that you may have to read MORE than ten papers to judge them. Each research paper is to be a minimum of ten pages in length, single-spaced, 12-point Times New Roman font. The use of illustrative figures is encouraged; however, such figures do not count in the page total. All references are to be cited properly, in the same manner that you would use for a dissertation or journal article.
The first research paper is to be in the area of deformation and failure of materials at elevated temperatures. Within that area you are to select a specific topic such as “Fatigue Mechanisms in Superalloys at Elevated Temperatures,” “High Temperature Fracture Mechanics of Aluminum Oxide,” “Modeling Mechanical Failure at Elevated Temperatures,” etc. Please inform me of your topic by January 25, 2012 (the end of the first full week of lectures).
For the second paper, you may choose any topic on high temperature materials or their processing that you wish. Please inform me of your topic by March 2, 2012 (two days after the Phase Stability lecture).
If you do not select a topic by the date specified, I will assign you a topic. If you don’t wish for that to happen, select your own topic.
This is a graduate course. You will notice that there are no homework assignments on the class schedule (though I will ask you to do a few, which will count towards the ‘class participation’ part of your grade). Instead of regular homework, you are expected to do a large amount of independent study (that is why there is no assigned textbook – you will need to read and understand suggested references and handouts). “I will know if you’ve been reading or not!” The research papers are the core of this course. Among the resources that you are expected to become familiar with are the numerous volumes on Superalloys, Intermetallics and Heat-resistant Materials. These are dedicated reference books and conference proceedings. I have copies of almost all of them in my office. I will allow you to look at them in my office and to make some copies. However, I will not check them out.
There are also a great number of original research articles available online, which contain a great deal of information on high temperature. You can access them through the ‘Databases’ tab on the UA library website. I suggest using ‘Compendex’ and ‘Web of Science’. These two databases link directly to our available online content and the Inter-Library Loans (ILL) website.
Not all resources are available in electronic format. You may actually have to go to the library!
Because of administrative and research schedule, it may be necessary to re-schedule some classes. Please give me a copy of your class schedule, so that we may find a time for the class to meet when such re-scheduling is necessary.
Class Policies:
Attendance at examinations is mandatory. If you must miss a scheduled examination due to serious illness, family death, accident, etc., notify Professor Weaver as soon as possible or bring a note from the doctor. Excuses of a non-urgent nature will not be accepted.
Quiz questions will primarily be of the short answer variety.
Late items will not be accepted.
All university rules concerning disabilities and academic misconduct apply in this course.Handouts/Assignments:
Primary References for Notes:
C.T. Sims, N.S. Stoloff, and W.C. Hagel editors, Superalloys II (John Wiley & Sons, New York, 1987)
J.R. Davis editor, ASM Specialty Handbook on Heat-Resistant Materials (ASM International, 1997)
M.J. Donachie and S.J. Donachie, Superalloys a Technical Guide (ASM International, 2002)
R.C. Reed, The Superalloys (Cambridge University Press, Cambridge, 2006)
