Load Interaction Effects On Fatigue Crack Growth In Ti 6al 4v Alloy

Author : Robert Peh-ying Wei
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.25/5 ( download)

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Download or read book Load Interaction Effects on Fatigue Crack Growth in Ti-6Al-4V Alloy written by Robert Peh-ying Wei and published by . This book was released on 1973 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of delay, retardation in the rate of fatigue crack growth, produced by load interactions in variable amplitude loading, on the accurate prediction of fatigue lives of engineering structures is discussed. The effects of a broad range of loading variables on delay in fatigue crack growth at room temperature are examined for a mill annealed Ti-6Al-4V alloy. The results are used to estimate crack growth behavior under programmed loads.

Author : JM. Larsen
Publisher :
ISBN 13 :
Total Pages : 13 pages
Book Rating : 4.64/5 ( download)

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Download or read book Fatigue Crack Propagation and Load Interaction Effects in a Titanium Alloy written by JM. Larsen and published by . This book was released on 2000 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation of load interaction effects in Ti-6Al-2Sn-4Zn-2Mo is presented. Simple variable amplitude loading spectra were applied to test samples, and the crack propagation stress intensity factor, KPR, was subsequently measured. The data were condensed to two equations ("master curves") that describe the influence of an unloading cycle after constant amplitude loading and a single overload cycle, respectively. The results suggest that load interaction effects are caused by residual compressive stresses ahead of the crack front, whereas the influence of crack closure is minor.

Author : T. T. Shih
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.76/5 ( download)

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Download or read book Load and Environment Interactions in Fatigue Crack Growth written by T. T. Shih and published by . This book was released on 1974 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The influences of environment on delay and on fatigue crack growth under programmed loading were examined for a mill annealed Ti-6Al-4V alloy. Test environments included dehumidified argon, air (with 30-60% relative humidity), distilled water, and 3.5% NaCl solution. The effects of load sequence and block size on fatigue under programmed loads were investigated also. Experimental results show that the mildly aggressive environments (atmospheric moisture and distilled water) have little effect on delay. Salt solution, on the other hand, has a significant effect on delay and on crack growth under programmed loading; the effect on delay being dependent on frequency or hold-time. Both load sequence and block size can significantly alter fatigue life under programmed loading. The need for further fundamental understanding of load and environment interactions in fatigue is discussed. (Modified author abstract).

Author : Ralph Ivan Stephens
Publisher : ASTM International
ISBN 13 :
Total Pages : 345 pages
Book Rating : 4./5 ( download)

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Download or read book Fatigue Crack Growth Under Spectrum Loads written by Ralph Ivan Stephens and published by ASTM International. This book was released on 1976 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : C. M. Ward-Close
Publisher :
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.86/5 ( download)

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Download or read book Variable Amplitude Fatigue Crack Growth in Titanium Alloy Ti-4Al-4Mo-2Sn-0.5Si (IMI 550). written by C. M. Ward-Close and published by . This book was released on 1988 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study has been made of fatigue crack growth behaviour in the titanium alloy (Ti-4Al-4Mo-2Sn-0.5Si) (IMI 550)), subject to single tensile overloads and the FALSTAFF flight simulation loading spectrum. Fatigue overloads were found to produce crack growth rate acceleration, followed by delayed retardation. The transient changes in crack growth rates were associated with large changes in crack closure immediately behind the crack tip. For both single overloads and flight simulation loading, the greatest load-interaction effects were at the lowest load amplitudes. Microstructure had only a slight influence on load-interaction effects associated with single tensile overloads. Great Britain. (jes).

Author : M. Jono
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.43/5 ( download)

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Download or read book Fatigue Crack Growth and Crack Closure Behavior of Ti-6Al-4V Alloy Under Variable-Amplitude Loadings written by M. Jono and published by . This book was released on 1999 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue crack growth tests under constant-amplitude and repeated two-step loadings were carried out on a (? + ?) Ti-6Al-4V alloy which has duplex structure made up of equiaxed primary ?-phase grains with a discontinuous fine ?-phase dispersed in the boundaries. It was found that fatigue crack grew along ?-phase grain boundaries and that the fracture surface was very rough in the low stress intensity region under constant-amplitude loading. On the other hand, in the high region, transgranular crack growth was observed and the fracture surface was relatively smooth. The crack opening point, Kop, was affected by the amplitude of low-level load, ?KL, under repeated two-step loadings where the high-level load amplitude was kept constant. Kop was found to be higher than that predicted by Kop -- Kmax relationship under constant-amplitude loading and the fracture surface was rougher in comparison with that under constant-amplitude loading which has the identical stress intensity range. It was concluded that the crack opening point was controlled by both plasticity-induced crack closure in terms ofKmax and roughness-induced crack closure resulted from rougher surface in ?KL.

Author : Stoyan Ivanov Stoychev
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.55/5 ( download)

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Download or read book Load Interaction Effects on Fatigue Crack Growth written by Stoyan Ivanov Stoychev and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : David Eugene Lemm
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.56/5 ( download)

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Download or read book The Effect of Load Excursions on Fatigue Crack Growth in a Titanium Alloy written by David Eugene Lemm and published by . This book was released on 1997 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : RW. Hertzberg
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.74/5 ( download)

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Download or read book Load Interaction Effects on Fatigue Crack Growth in A514F Steel Alloy written by RW. Hertzberg and published by . This book was released on 1977 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Variable-amplitude fatigue tests of A514F steel alloy were performed within a linear-elastic fracture mechanics framework in order to characterize the retardation response of a cyclic strain softening material. Results of single and multiple overload tests on A514F steel alloy suggested that a material's cyclic properties have little effect on the phenomenology of retardation behavior. For instance, single high load excursions (of different magnitudes and at different baseline ?K levels) in this cyclic strain softening alloy caused fatigue crack growth rate retardation trends comparable to those exhibited by 2024-T3 aluminum, a cyclic strain hardening alloy. In addition, under complex loading conditions, the A514F steel alloy, like the 2024-T3 aluminum alloy, exhibited maximum interaction between single peak load excursions when two peak cycles were separated by a small distance.

Author : Fraser J. McMaster
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.36/5 ( download)

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Download or read book The Effects of Load Interaction on Fatigue Crack Growth and Crack Closure in Aluminium Alloys written by Fraser J. McMaster and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: