| Subject name |
Engineering Steels and Alloys |
| Charge teacher |
Yoshio Monma |
| Lectures target |
1st,2nd,3rd |
Class |
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| lecture room |
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Course time |
the former term |
| day・period |
OUT |
Unit classification |
select |
| Lecture form |
general lecture |
Unit Count |
2 |
| Matter of prepare |
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| Notes |
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| Details1 |
Lecture Outline
In this course we cover engineering steels and alloys widely used for structures of buildings, bridges, trains, aircrafts, automobiles and vessels in modern societies. The particular properties associated with each type of steel and alloy are resulted from the processing history and microstructural controlling of the material. We learn the families of carbon steel, low alloy steel, stainless steel, superalloys, aluminum alloys and titanium alloys. The technology we examine includes melting, forming, heat treatment of alloys to meet the requirements of applications.
We also review the trend of R&D towards to solve environmental issues.
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Target
Understanding of fundamental properties of metallic materials to make environment-conscious product
Syllabus
1. Course Outline, Classification of Steels and Alloys
Application of metallic materials with materials flow analysis is outlined. Properties, cost, availability and environmental loads are discussed.
2. Fundamentals of Engineering Steels and Alloys
Phase diagrams of solid-solution, precipitation-hardening, iron-carbon system are presented. Brief discussion on heat treatment and phase transformation for steel will be given. How to change the properties of a steel through the mechanisms based on the materials science.
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3. Steel 1 - Carbon Steel
The carbon steel is the basis of metallic materials. We learn the processing and properties of the steel. The interaction of the steel with the environment, and other properties in addition to the mechanical ones will be discussed.
4. Steel 2 - Low Alloy Steel
If we add a small amount of the alloying elements such as Ni, Cr and Mo to the low carbon steel and the proper thermo-mechanical treatment, the improvement of mechanical properties is remarkable. The class of the steel is also known by lower environmental load, thus a good candidate of the ecomaterial.
5. Steel 3- Stainless Steel
Addition of Ni and Cr to low carbon steel makes it heat and corrosion resistant. These steel are stainless and classified austenitic, ferritic and dual phase steels.
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6. Superalloys
The superalloys used in the heart of gas turbines and jet engines are most advanced and expensive materials we use today. They can withstand severest environment of very corrosive and ultra high-temperature. Unique processing technology has been developed for this family of material.
7. Casting and Cast Alloys
The first metallic material the mankind handled was the casting. In some applications still we used the casting process for better performance with low cost.
8. Degradation of Metallic Materials (Corrosion and counter-measure)
Oxygen and hydrogen can penetrate into the metal and form compounds that eventually deteriorate the materials properties. We learn the mechanism and how to cope with the chemical attack.
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9. Welding of Metals
In order to build the gigantic bridges and skyscrapers the welding and joining similar and dissimilar metals are required. We learn the welding process and related technology.
10. Aluminum and Magnesium Alloys
Here we cover a family of metals called the light metals. They have versatile applications to housing and aerospace structures. The secret here is to control the strength by heat treatment of aging.
11. Titanium Alloys
Titanium is one of common metals found on the earth and has good properties. The R&D efforts to make the intrinsically brittle Ti alloy into ductile one is still active theme of the materials science.
12. Steels and Alloys Applied to Energy Systems
Batteries, nuclear power, fossil power, hydrogen storage (fuel cells) geothermal power, and wind power generation are another examples of the versatility of steels and alloys.
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13. Metals for Special Applications
There are yet another applications such as abrasive-resistant, superplastic, shape memory, superconducting alloys. They are often called the advanced materials.
We can compare the merits of the advanced materials with other existing ones.
14. Metals as Ecomaterial
Metals are processed from the ore, smelting, refining, hot and cold working to yield the product. After years of service they must retire safely. A good amount of life cycle assessment studies are available for steels and aluminum alloys
15. Final Examination
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References
1) 西川精一「金属工学入門」、アグネ技術センター（2001）、
ISBN4-900041-92-0, \6,000
2) 「入門・金属材料の組織と性質―材料を生かす熱処理と組織制御」、
日本熱処理技術協会
3) 鈴木朝夫編「金属材料活用辞典」、産業調査会（2000）\29,800
4) 大和久重雄「鉄鋼材料選択のポイント」、日本規格協会（1992）
5) 高橋恒夫「新版 非鉄金属材料選択のポイント」、日本規格協会（1994）ISBN4-542-30363-2 \3,495
6) 田中良平編「ステンレス鋼の選び方・使い方」、日本規格協会（1994）ISBN4-542-30370-5, \4,500
7) 谷野 満・鈴木 茂「鉄鋼材料の科学」内田老鶴圃（2001）
ISBN4-7536-5615-2 \3,800
8) JISハンドブック鉄鋼ⅠⅡ、非鉄、熱処理、溶接など、日本規格協会
9) M. Ashby: Materials Selection in Mechanical Design, Fourth Edition, Butterworth-Heinemann (2010)
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Grading: Homework 30%, Research Assignment 20%, Final Exam: 50%
Preparation
Enrolling students should register at:
MatNavi: http://mits.nims.go.jp/
http://metallicmaterials.nims.go.jp/
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