A Model for Life Predictions of Nickel-Base Superalloys in High-Temperature Low Cycle Fatigue PDF Download
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Author: SD. Antolovich
Publisher:
ISBN:
Category : Environmental engineering
Languages : en
Pages : 12
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Book Description
Extensive characterization of low-cycle fatigue damage mechanisms was performed on polycrystalline René 80 and IN100 tested in the temperature range from 871 to 1000°C. Low-cycle fatigue life was found to be dominated by propagation of microcracks to a critical size governed by the maximum tensile stress. A model was developed which incorporates a threshold stress for crack extension, a stress-based crack growth expression, and a failure criterion. The mathematical equivalence between this mechanistically based model and the strain-life low-cycle fatigue law was demonstrated using cyclic stress-strain relationships. The model was shown to correlate the high-temperature low-cycle fatigue data of the different nickel-base superalloys considered in this study.
Author: SD. Antolovich
Publisher:
ISBN:
Category : Environmental engineering
Languages : en
Pages : 12
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Book Description
Extensive characterization of low-cycle fatigue damage mechanisms was performed on polycrystalline René 80 and IN100 tested in the temperature range from 871 to 1000°C. Low-cycle fatigue life was found to be dominated by propagation of microcracks to a critical size governed by the maximum tensile stress. A model was developed which incorporates a threshold stress for crack extension, a stress-based crack growth expression, and a failure criterion. The mathematical equivalence between this mechanistically based model and the strain-life low-cycle fatigue law was demonstrated using cyclic stress-strain relationships. The model was shown to correlate the high-temperature low-cycle fatigue data of the different nickel-base superalloys considered in this study.
Author: Claude Amzallag
Publisher: ASTM International
ISBN:
Category :
Languages : en
Pages : 658
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Book Description
Author: Harvey D. Solomon
Publisher: ASTM International
ISBN: 080310944X
Category : Engineering design
Languages : en
Pages : 1289
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Book Description
Author: Stephen D. Antolovich
Publisher:
ISBN:
Category :
Languages : en
Pages : 38
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Book Description
The low cycle fatigue (LCF) of Rene 80 has been investigated at 1400, 1600 and 1800 F. Emphasis has been placed on the 1800 F studies using smooth bar (continuous cycling and 90 sec hold time) and notch LCF specimens. The detailed transmission electron microscopy shows that at 1600 and 1800 F the dislocation debris is independent of test rate over two orders of magnitude. The test results can not be explained in terms of the conventional approaches to high temperature LCF for which damage is assumed to result from creep/fatigue interactions. Instead, it is suggested that the important damage mechanism is an interaction between the deformation mode and the environment. Based on that understanding a model is developed for crack propagation at elevated temperatures and a similar model is being developed for crack initiation. (Author).
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 368
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Author:
Publisher:
ISBN:
Category : Engines
Languages : en
Pages : 232
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Author: Ian Milne
Publisher: Elsevier
ISBN: 0080490735
Category : Business & Economics
Languages : en
Pages : 4647
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Book Description
The aim of this major reference work is to provide a first point of entry to the literature for the researchers in any field relating to structural integrity in the form of a definitive research/reference tool which links the various sub-disciplines that comprise the whole of structural integrity. Special emphasis will be given to the interaction between mechanics and materials and structural integrity applications. Because of the interdisciplinary and applied nature of the work, it will be of interest to mechanical engineers and materials scientists from both academic and industrial backgrounds including bioengineering, interface engineering and nanotechnology. The scope of this work encompasses, but is not restricted to: fracture mechanics, fatigue, creep, materials, dynamics, environmental degradation, numerical methods, failure mechanisms and damage mechanics, interfacial fracture and nano-technology, structural analysis, surface behaviour and heart valves. The structures under consideration include: pressure vessels and piping, off-shore structures, gas installations and pipelines, chemical plants, aircraft, railways, bridges, plates and shells, electronic circuits, interfaces, nanotechnology, artificial organs, biomaterial prostheses, cast structures, mining... and more. Case studies will form an integral part of the work.
Author: Ramaswamy Viswanathan
Publisher: ASM International
ISBN: 9780871703583
Category : Science
Languages : en
Pages : 497
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Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 918
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 384
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Book Description
