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| Research on creep experiments and rheological model of visco-plastic metal materials |
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Abstract The creep experiments have been done on Lc4 aluminum alloy, TC11 titanium alloy, the carbon constructional quality steels (20 steel, 35 steel) under high temperature, and on electro deposited nickel thin film under room temperature. The integral creep constitutive equation and differential stress-strain constitutive relationship can be established according to relevant rheological model named revised Burgers and the integral core of the creep has been achieved through the experiments. Comparing the calculation results conducted from the model with the experiment results, they were in good agreement. Moreover, the coefficient related with viscosity of visco-plastic materials were obtained through creep experiments’ datum. The viscosity coefficients under high temperature of the former three kind of materials were compared; and the mechanical characteristics of the loading, unloding and creep caves under room temperature of the electro deposited nickel thin film were also analyzed.
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Received: 19 August 2009
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2011, Vol. 32 
