Fretting Fatigue Behavior Of The Titanium Alloy Ti 6al 4v Under Seawater Conditions

Author : Lewis C. Lietch
Publisher :
ISBN 13 : 9781423516637
Total Pages : 129 pages
Book Rating : 4.3X/5 ( download)

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Download or read book Fretting Fatigue Behavior of the Titanium Alloy Ti-6AL-4V Under Seawater Conditions written by Lewis C. Lietch and published by . This book was released on 2004-03-01 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fretting fatigue behavior of Ti-6A1-4V was investigated in laboratory air and under a controlled environment consisting of synthetic seawater. Fretting fatigue tests were performed for both low and high cycle fatigue regimes. Finite element analysis was utilized to model and analyze the experimental data. The applied stress range and the Modified Shear Stress Range were evaluated as potential fatigue parameters. The results found from this study can be summarized as: (1) seawater had a deleterious effect on fretting fatigue life in the low cycle fatigue regime but improved life in the high cycle fatigue regime, (2) although the Q/P ratio for both conditions increased with an increasing applied stress, the difference between the two conditions was negligible, (3) debris from dry samples contained titanium and oxides while the debris from seawater samples contained titanium, oxides, and seawater contaminants, (4) fretting scar volume was larger under seawater conditions than dry conditions, (5) there were more, closely spaced striations on the fracture surface of the dry samples than of the seawater samples, and (6) both the applied (far field) stress range and the Modified Shear Stress Range can potentially be used as conservative fretting fatigue parameters under high cycle fatigue conditions.

Author :
Publisher :
ISBN 13 : 9781423519195
Total Pages : 82 pages
Book Rating : 4.91/5 ( download)

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Download or read book Fretting Fatigue Behavior of Shot-Peened Titanium Alloy TI-6AL-4V Under Seawater Conditions written by and published by . This book was released on 2004-06-01 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fretting fatigue behavior of the shot-peened titanium alloy, Ti- 6Al-4V, was investigated under a corrosive environment of synthetic seawater. Fretting fatigue tests were performed over a wide stress range to determine the effect of seawater at high and low cycle fatigue regimes. The results from this study showed: (1) seawater significantly reduces the fretting fatigue life of shot-peened Ti-6Al-4V at both high and low cycle fatigue relative to its counterpart in ambient laboratory conditions, (2) shot peening increases the fretting fatigue life of Ti-6Al-4V when tested under dry and seawater conditions relative to its counterpart of unpeened Ti-6Al-4V, (3) surface debris from samples tested under seawater conditions contained large quantities of oxide and seawater contaminants, (4) cleaning after testing removed most of the oxide and seawater contaminants from the sample.

Author : William Y. Allen
Publisher :
ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.43/5 ( download)

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Download or read book Fretting Fatigue Behavior of Shot-peened Titanium Alloy TL-6AL-4V Under Seawater Conditions written by William Y. Allen and published by . This book was released on 2004 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Onder Sahan
Publisher :
ISBN 13 : 9781423511564
Total Pages : 116 pages
Book Rating : 4.65/5 ( download)

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Download or read book Fretting Fatigue Behavior of a Titanium Alloy Ti-6AL-4V at Elevated Temperature written by Onder Sahan and published by . This book was released on 2002-03-01 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this research is to investigate the fretting fatigue behavior of the titanium alloy Ti-6Al-4V at elevated temperature is investigated. Fretting and plain fatigue experiments are conducted at 260 . Crack initiation location and crack initiation orientation is measured and fretting and plain fatigue life data of the specimens from these tests are obtained. Fatigue parameters capable of predicting the number of cycles to specimen failure, the crack location and the crack orientation along the contact surface are analyzed. The parameters are calculated by using the computed stresses and strains obtained from the finite element analysis. The mechanisms responsible for the fretting fatigue crack initiation are determined. The effect of elevated temperature is examined by comparing room and elevated temperature fretting and plain fatigue data.

Author : S. Shirai
Publisher :
ISBN 13 :
Total Pages : 13 pages
Book Rating : 4.19/5 ( download)

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Download or read book Fretting Fatigue Characteristics of Titanium Alloy Ti-6Al-4V in Ultra High Cycle Regime written by S. Shirai and published by . This book was released on 2003 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the present study, fretting fatigue behavior of a Ti-6Al-4V alloy under high stress ratios in the ultra high cycle regime (up to 109 cycles) has been investigated. The slope of S-N curve decreased with increasing stress ratio. The slope was steeper in short fatigue life region and became flatter in longer life region. The test results under various stress ratios followed the modified Goodman diagram for both the fatigue strengths defined at 107 cycles and 108 cycles. The so-called non-propagating cracks, which were often observed in steels and aluminum alloys, could not be found in the run-out specimens tested up to 107 cycles. In the further loading cycles up to 109 cycles at the same stress amplitude, no crack initiation and propagation could be observed, which indicated that the conventional fretting fatigue strength defined 107 cycles was still effective at least up to 109 cycles. Different behavior between the titanium alloy used and the other materials mainly results from the different crack initiation behavior.

Author : Edward P. Phillips
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.39/5 ( download)

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Download or read book Effect of Outdoor Exposure at Ambient and Elevated Temperatures on Fatigue Life of Ti-6Al-4V Titanium Alloy Sheet in the Annealed and the Solution-treated and Aged Condition written by Edward P. Phillips and published by . This book was released on 1974 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : SE. Kinyon
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.55/5 ( download)

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Download or read book Spectrum Load Effects on the Fretting Behavior of Ti-6Al-4V written by SE. Kinyon and published by . This book was released on 2000 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation was performed to determine the effects of spectrum loading on the fretting fatigue life of titanium alloy Ti-6Al-4V. The research program consisted of a 10 Hz spectrum load cycle applied at six conditions of interest with a normal pressure of 31 MPa. Baseline tests were performed at three stress levels, 345, 310, and 286 MPa maximum load using a conventional haversine waveform. Tests were performed using a spectrum load waveform consisting of 2 cycles, one at 345 MPa, followed by another at 310 MPa, repeated to failure. Additional tests were performed using 345 and 286 MPa. The final condition of interest was investigated using a 345/310/286 MPa waveform. Miners rale was applied to each of the spectrum load cases to test the hypothesis that the titanium alloy followed Miners Rule under the loading conditions. The three conditions of interest varied from Miners Rule by 23, 47, and 62%. From these results it was concluded that Miners Rule was insufficient to predict failure lives of Ti-6Al-4V in fretting fatigue.

Author : AMH Taylor
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.91/5 ( download)

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Download or read book Fretting Fatigue Behavior of Titanium Alloys written by AMH Taylor and published by . This book was released on 2003 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: A discussion of experimental studies to characterize the fretting fatigue behavior of titanium alloys is presented. This includes studies to evaluate the effects of normal pressure, contact material conditions, surface treatments, and environment. In addition, concepts of normal pressure threshold and damage threshold as related to fretting fatigue of titanium alloys are discussed. Finally, this paper is concluded with suggestions for future research efforts that are essential to improve understanding of the fretting fatigue behavior of titanium alloys.

Author : Rihong Wang
Publisher :
ISBN 13 :
Total Pages : 306 pages
Book Rating : 4.97/5 ( download)

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Download or read book Effects of Stress-relieving Slots and Friction on Fretting Fatigue Behavior of Ti-6Al-4V written by Rihong Wang and published by . This book was released on 2005 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Hassan A. Fadag
Publisher :
ISBN 13 :
Total Pages : 360 pages
Book Rating : 4.50/5 ( download)

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Download or read book An Investigation of the Propagation Behavior of Fretting Fatigue Cracks in Ti-6Al-4V written by Hassan A. Fadag and published by . This book was released on 2005 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: