8.1 Division of materials by cost

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8.1 Division of materials by cost
Per lb 1997 data Budinski
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Materials costing 1.0-10/lb
1997 data Budinski and Budinski 1999
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Materials costing above 20/lb
1997 data Budinski
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8.2 Machining cost of metals
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8.3 Difficulties in material selection

• An overwhelmingly large materials world.
• A very broad range of properties that are
  important to the performance of a product.

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8.4 A systematic approach

• Convergence in material selection
• (elimination of materials)
• Divergence in property consideration
• (Inclusion of more properties)
• Reiteration in material selection

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Basic design function
Subset of Materials
Broadening Property Range
Reiterate
Narrowing Material Subset
Final Materials
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Example-1 materials for a micrometer
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Example-2 materials for differential gear in
auto transmission
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Example-3 Materials for the exhaust manifold
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8.5 Elastic vs plastic properties