Lec 24 - ENGR ENGR 4250 Advanced Materials Engineering...

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ENGR 4250 ENGR 4250 – Advanced Materials Engineering Lecture 24 Economic, Environmental, and Societal Issues in Materials Science and Engineering
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Other courses • EDUC 1470U Impact of Science and echnology on Society Technology on Society • ENVS 1000U Environmental Science • ENGR 4380U Life Cycle Engineering.
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Material Selection Material properties or property combinations – mechanical, electrical, thermal, corrosion, etc Process ability or ease of fabrication of the component Other important criteria that must be considered in the development of a marketable product. Economic – Unrelated to scientific principles and engineering practice – Significant if a product is to be competitive marketplace. Other criteria – environmental and societal issues • Pollution • Disposal • Recycling nergy energy
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Economic Considerations Material selection erform reliably and satisfactorily Perform reliably and satisfactorily – Economics • The product must be offered for sale • Economically attractive Control over – component design – the materials used – the manufacturing techniques that are employed
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Component Design Cost for the design efforts pecs, drawings Specs, drawings Component is part of a complex device – Automobile, TV, appliances – Interaction considerations Highly iterative process that involves many compromises and trade-offs yp – System constraints – Optimal design may not be possible
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Materials Used Appropriate combination of properties re the least expensive Are the least expensive Select a family of materials – Cost comparisons of the various candidate aterials materials – Account for wastage in manufacturing process – Relative costs
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Manufacturing Techniques • Influenced by both the material selected and part design Primary operations – Recognizable part – Casting, plastic forming, powder compaction, molding Secondary operations – Finished part – Heat treatments, welding, grinding, drilling, painting, decorating • Capital equipment, tooling, labor, repairs, machine owntime and waste downtime, and waste • Assembly costs, inspection and packaging of the final product
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Other Manufacturing Costs (OH) • Labor fringe benefits • Supervisory and management labor • Research and development • Property and rent • Insurance, profit, taxes, and so on.
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Environmental and Societal onsiderations Considerations
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aterials are crucial Materials are crucial
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This note was uploaded on 10/18/2010 for the course ENGR 3360 taught by Professor Ahmadbarari during the Fall '10 term at UOIT.

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Lec 24 - ENGR ENGR 4250 Advanced Materials Engineering...

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