MET 34800 - Engineering Materials Chapter 19 - IUPUI...

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MET 34800 – ENGINEERING MATERIALS IUPUI ENGINEERING TECHNOLOGY ENT Department
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CHAPTER 19 ALUMINUM AND ITS ALLOYS Engineering Materials: properties and selection, 9th ed. Kenneth G. Budinski, Michael K. Budinski
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Upon completion of this chapter, the student should: have an understanding of aluminum alloy systems and alloy designations have a working knowledge of heat treatment and coating of aluminum have guidelines for alloy selection CHAPTER GOALS Students need to leave this chapter with a repertoire of alloys to fit their perceived needs and a working knowledge of aluminum designations, heat treatments, coatings, and properties. 3
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Historical development Aluminum ore (bauxite) Conversion with the Hall Cell Ingot to mill products INTRODUCTION 4
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Figure 19–1 Cell reduction of aluminum oxide to aluminum INTRODUCTION 5
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Electrical conductivity Density Non-toxic Relatively low E Fabricability Corrosion resistance 19.1 GENERAL CHARACTERISTICS 6
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Figure 19–2 Density of aluminum compared to other metals 19.1 GENERAL CHARACTERISTICS 7
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The following are some of the noteworthy advantages of using aluminum. 19.1 GENERAL CHARACTERISTICS 1. One-third the weight of steel 2. Good thermal and electrical conductivity 3. High strength-to-weight ratio 4. Can be given a hard surface by anodizing and hard coating 5. Most alloys are weldable 6. Will not rust 7. High reflectivity 8. Can be die cast 9. Easily machined 10. Good formability 11. Nonmagnetic 12. Nontoxic 13. One-third the stiffness of steel 8
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Designations include heat treat, and manufacturing, 6XXX-T6, etc. Cast alloys Aluminum products 19.2 ALLOY DESIGNATION 9
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