Johnson Cook in COMSOL

Hi,

I am trying to implement Johnson Cool model for Friction Stir Welding heat transfer module. I have defined the JC variable values in 'Materials' section. However, changing these values is creating no change in temperature results at all (using cut point analysis). I have tested on extreme values for all the JC parameters but the results remain unaffected. Apart from defining it under materials, am I supposed to introduce JC model values/equation somewhere else in the model as well?

Please guide.

Thanks, Eisha