MM504 Lecture 24: Creep and Stress Rupture test, LMP and MG parameters

Creep and stress rupture tests are methods used to determine the long-term behavior of materials under constant or varying loads at high temperatures. Creep tests measure the deformation of a material over time under a constant load, while stress rupture tests determine the time it takes for a material to fail under a constant load. The Larson-Miller parameter and the MG parameter are two approaches used to predict the behavior of materials under high temperature and stress conditions. The Larson-Miller parameter correlates temperature and time to failure, while the MG parameter considers both temperature and stress. These parameters are useful in predicting the long-term behavior of materials in high-temperature environments and can aid in selecting materials for applications in which they will be subjected to sustained loads at elevated temperatures.