Prediction discussion about stress rupture life of ZL116 cast aluminum allov
The stress rupture life of ZL116 cast aluminum alloy under different stress conditions at 200 ℃ was studied through a series of stress rupture tests.The double logarithmic stress-strain curve of stress rupture life was obtained by iso-therm extrapolation model and linear regression operation.The median curve formula,50％confidence 99.9％survival rate curve formula,and 95％confidence 97.7％survival rate curve formula were obtained.The theoretical calculation data of ZL116 at 200 ℃ were compared with the experimental data.The results showed that the theoretical calculation data matched well with the experimental data,realizing the possibility of predicting the stress rupture life through the given dura-bility strength.This pethood could save design costs and improve the equipment safety.
ZL116stress rupture life predictioncreep fracturestress rupture strength
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