Creep-fatigue testing simulates the loading and temperature conditions experienced by turbine disks of aircraft engines, nuclear reactor components and power plant components during service. With increasing need for cyclic operation during peak power demands, reliable creep-fatigue testing is necessary for the life assessment of aging power plants.
A new ASTM standard, E2714, Test Method for Creep-Fatigue Testing, provides a means for this type of testing. The new standard was developed by Subcommittee E08.05 on Cyclic Deformation and Fatigue Crack Formation, part of ASTM International Committee E08 on Fatigue and Fracture.
According to Ashok Saxena, Ph.D., dean, distinguished professor and Irma and Raymond Giffels’ Endowed Chair, College of Engineering, University of Arkansas, test results from the standard can be used to assess the suitability of materials for demanding applications in which safety is a primary concern.
“The results are also used to predict the design and remaining life of components that operate at high temperatures and to determining how frequently these components must be inspected for damage in the form of cracks during services,” says Saxena.
Saxena notes that all constituents who will benefit from E2714 have been involved in its development through the task group and a round robin study. Primary users of the standard will include manufacturers and operators of equipment that run at high temperatures, such as steam and gas turbines for air, sea and land operations, as well as the chemical, defense and aerospace industries.
Technical Information: Ashok Saxena, Ph.D., University of Arkansas, Fayetteville, Ark.
ASTM Staff: Jeffrey Adkins