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Unformatted text preview: That is why there is volume expansion upon solidification. 4. The thermal expansion coefficient and elastic moduli for several metals are listed below. Make a plot of the expansion coefficient as a function of elastic modulus. (a) Describe qualitatively the basis for the correlation that is observed. (b) What is your expectation for the variation in the melting point of these metals? Justify your answer. (c) Provide qualitative F (interatomic force) vs a (interatomic distance) and V (interatomic potential) vs a graphs for Ni and Mo and indicate which features of the graphs relate to their different physical properties (thermal expansion, elastic modulus and melting point). Thermal expansion Elastic modulus Metal Coefficient ( o C-1 x10 6 ) (10 3 ksi) A l 1 1 2 4 C u 1 8 1 8 N i 2 6 1 3 Cr 6.2 36 Li 56.0 1.6 Mo 4.9 47 K 83.0 0.51 Na 71.0 1.3 W 4.6 56.4...
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This note was uploaded on 01/22/2012 for the course ME 2733 taught by Professor Meng during the Fall '10 term at LSU.
- Fall '10
- Mechanical Engineering