Materials M1

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Curtin University *

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PRRE1003

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Material Science

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Oct 30, 2023

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pdf

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53

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PRRE1003 Resources, Processes & Materials Engineering Materials: Metals and Alloys LECTURE M1 Dr Garry Leadbeater Garry.Leadbeater@exchange.curtin.edu.au
2
3 Lecture focus Reproduced from “Materials and Man’s Needs”, National Academy of Sciences, Washington D.C., 1974.
4 Lecture Outline What are ‘raw’ or ‘bulk’ materials? What are engineering materials? Do they matter? Are they matter? Gases, Liquids, Solids Focus on Solids What holds them together? Bonding, structure, order, crystalline, amorphous. Classifications Metals, Polymers, Ceramics, Composites Crystal Structures and Crystallography Simple Cubic, BCC, FCC, HCP and Miller Indices Polycrystalline metals and crystal imperfections- vacancies and dislocations Strengthening Mechanisms in Metallic Materials Elastic and Plastic Deformation - dislocations and slip systems Mechanical properties in relation to structure Crystal (grain) size, work hardening Alloying (Reference and extract sources in this section - Materials: Engineering, Science, Processing and Design 3E; M Ashby, H Shercliff, and D Cebon. [Ashby] Materials Science and Engineering-An Introduction 10E; WD Callister and DG Rethwisch. [Callister])
5 States of Matter Matter is commonly found on Earth in the following states Solid Liquid Gas
6 Solid Materials Material Bonding As two atoms come close together they experience attractive forces between the (negative) electron clouds and the (positive) nuclei. The two atoms also experience the repulsive force between the two nuclei as well as the repulsive force between the two electron clouds. At a separation (r o ) the sum of both the attractive forces and the repulsive forces equals zero. Significant other parameter - Temperature
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