Elevated-temperature fatigue interactions in engineering materials

AbstractThe development of failure at elevated temperature under transient loading conditions can be a complex process. In addition to the operation of the basic fatigue mechanism, which often initiates a dominant surface crack, other time-dependent processes operate to a varying degree. These include creep deformation and fracture processes, metallurgical changes, and environmental effects. In failures controlled by the dominant crack these processes can markedly alter both crack-initiation and crack-growth rates. It is shown that effects on crack growth are usually limited to an order of magnitude change, the important factor being their effect on the crack-tip displacement. Serious acceleration of failure can occur when internal fracture damage due to creep processes directly contributes to crack advance. This is analogous to plastic instability in low-temperature failure. A study of the development of failure can provide a new basis for the design of components in elevated-temperature service.

[1]  G. Smith,et al.  Initial stages of damage in high stress fatigue in some pure metals , 1963 .

[2]  B. Tomkins,et al.  The Development of Fatigue Crack Propagation Models for Engineering Applications at Elevated Temperatures , 1975 .

[3]  R. Koterazawa,et al.  Fracture Mechanics and Fractography of Creep and Fatigue Crack Propagation at Elevated Temperature , 1976 .

[4]  C. Laird,et al.  Cyclic stress-strain response of F.C.C. metals and alloys—I Phenomenological experiments , 1967 .

[5]  C. E. Richards,et al.  The yield-point loads of singly-notched pin-loaded tensile strips , 1974 .

[6]  B. Tomkins,et al.  Low endurance fatigue in metals and polymers , 1969 .

[7]  W. M. M. Morrison.  A New Concept of Truck Transmission Design , 1974 .

[8]  R. Skelton.  High strain fatigue of 20Cr/25Ni/Nb steel at 1025 K part III: Crack propagation , 1975 .

[9]  J. Rice,et al.  Plane strain deformation near a crack tip in a power-law hardening material , 1967 .

[10]  J. Wareing.  Fatigue crack growth in a type 316 stainless steel and a 20 pet Cr/25 pet Ni/Nb stainless steel at elevated temperature , 1975 .

[11]  R. Pelloux,et al.  High temperature fatigue crack growth in a cobalt base superalloy , 1973 .

[12]  J. F. Knott,et al.  Micro cleavage cracking during fatigue crack propagation in low strength steel , 1974 .

[13]  J. F. Knott,et al.  The Initiation and Propagation of Ductile Fracture in Low Strength Steels , 1976 .

[14]  J. Wareing.  Creep-fatigue interaction in austenitic stainless steels , 1977 .

[15]  C. E. Richards,et al.  Oxidation-assisted crack growth during high cycle fatigue of a 1%CrMoV steel at 550°C , 1976 .

[16]  H. Solomon.  Frequency dependent low cycle fatigue crack propagation , 1973 .

[17]  L. James,et al.  Fatigue-crack propagation behavior of type 304 stainless steel in a liquid sodium environment , 1975 .

[18]  C. Brinkman,et al.  Estimates of Creep-Fatigue Interaction in Irradiated and Unirradiated Austenitic Stainless Steels , 1972 .

[19]  L. James.  Some Questions Regarding the Interaction of Creep and Fatigue , 1976 .

[20]  L. James.  Hold-Time Effects on the Elevated Temperature Fatigue-Crack Propagation of Type 304 Stainless Steel , 1972 .