The average stress method

modified average radial stress method

residual deformation method

and local plastic strain method which were used for burst speed forecast were introduced.power metallurgy(P/M) superalloy turbine disc's burst speed was analyzed with these methods.By comparing the forecast results with test results

it can be found that the forecast results agreed well with the test results using the modified average radial stress method

residual deformation method and local plastic strain method.However

the forecast burst speed by the average stress method based on radial stress distributing equably are not in agreement with test results.