A turbine blade having a preestablished rate of thermal expansion is attached to a turbine wheel having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the turbine blade. The turbine wheel includes a pair of side walls having a groove formed therebetween and a pair of axially aligned holes radially positioned therein. The turbine blade has a root portion having a bore positioned therein. A pin having a preestablished rate of thermal expansion being substantially equal to the rate of thermal expansion of the blade is positioned within the axially aligned holes and the bore attaches the blade to the turbine wheel.
