MAT 321 chapter 7.ppt - Chapter 7 Metal strengthening Mechanism MAT321 Dr Haixue Yan Strength of metals The structure of an alloy is influenced On the

MAT 321 chapter 7.ppt - Chapter 7 Metal strengthening...

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Chapter 7 Metal strengthening Mechanism MAT321 Dr. Haixue Yan
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Strength of metals The structure of an alloy is influenced On the atomic scale Dislocation densities, vacancy concentrations Composition variations On the micro scale Phase Grain shape and size distributions Both of them has significant influence on properties of alloys.
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Mechanism: Microstructure hardening: Reduce Grain Size
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Mechanism 2: Solid Solutions hardening Figure 7.16 Variation with nickel content of ( a ) tensile strength, ( b ) yield strength, and ( c ) ductility (%EL) for copper–nickel alloys, showing strengthening. Empirical relation:
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Effects of Stress at Dislocations Adapted from Fig. 7.5, Callister 7e.
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  • Spring '17
  • Strength of materials, Work hardening, Strengthening mechanisms of materials

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