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The study of fatigue at elevated temperature requires the evaluation of material response to several load-time profiles in specified thermal-chemical-nuclear-electric fields. This review of test methods emphasizes the relationships between “pure low-cycle fatigue” and tensile, fracture toughness, creep, cyclic-creep, creep fatigue (interspersion), fatigue-cycle-with-hold, dynamic creep, fatigue crack growth, and high-cycle fatigue testing. The thermal and environmental control is discussed. Special attention is given to isothermal-uniaxial, bending, torsion, and combined stress tests. Cyclic thermal testing is reviewed. Strain measurement, signal conditioning, computer utilization, fatigue crack growth, vacuum and environmental control, nondestructive testing, acoustic emission, and fractography are reviewed as they pertain to fatigue at elevated temperature. Specimen design, gripping, and testing machine characteristics are also discussed.
fatigue (materials), tests, test equipment, heating methods, fatigue, thermal fatigue, cracking (fracturing), creep-fatigue, cyclic loads, dynamic creep, strain measurement, specimen design
Professor of mechanical engineering, The University of Alabama, University, Ala.