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Author : Joseph Stephen Santner
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (719 download)
Download or read book Microstructural Effects on Fatigue Crack Propagation in Aluminum-copper Alloys written by Joseph Stephen Santner and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joseph S. Santner
Publisher :
ISBN 13 :
Total Pages : 306 pages
Book Rating : 4.:/5 (22 download)
Download or read book Microstructural Effects on Fatigue Crack Propogation in Aluminium-copper Alloys written by Joseph S. Santner and published by . This book was released on 1980 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jack Telesman
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (317 download)
Download or read book A Study of Spectrum Fatigue Crack Propagation in Two Aluminum Alloys. 2: Influence of Microstructures written by Jack Telesman and published by . This book was released on 1985 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : W. G. Truckner
Publisher :
ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.:/5 (227 download)
Download or read book Effects of Microstructure on Fatigue Crack Growth of High-Strength Aluminum Alloys written by W. G. Truckner and published by . This book was released on 1976 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effects of microstructure and composition on resistance to fatigue crack growth were determined using constant amplitude loading conditions in low and high humidity air at test frequencies of 2 and 20 Hz. Strengthening precipitate had the largest effect at delta K above about 4 KSI sq. root of (in.), while solute composition had the largest effect at delta K below about 3 KSI sq. root of (in.). Large intermetallic particles affected growth at high and intermediate levels of delta K. (Author).
Author :
Publisher : American Society of Civil Engineers
ISBN 13 :
Total Pages : 554 pages
Book Rating : 4.3/5 (91 download)
Download or read book Fatigue and Microstructure written by and published by American Society of Civil Engineers. This book was released on 1979 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 115 pages
Book Rating : 4.:/5 (227 download)
Download or read book Effect of Microstructure on 7XXX Aluminum Alloy Fatigue Crack Growth Behavior Down to Near-Threshold Rates written by and published by . This book was released on 1981 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: This investigation was undertaken to clarify the role of microstructure on steady state (constant load amplitude) and transient (single periodic overload) fatigue crack growth behavior in 7XXX aluminum alloys at low stress intensity factor ranges (delta K). These results were consolidated with data in the literature to obtain an understanding of microstructural effects on crack growth response over a broad delta K range. Constant load amplitude data show that there are significant differences in near-threshold FCG resistance among 7XXX alloys. Overaging to a T7 temper reduces low delta K FCG resistance greatly, whereas intermediate and high delta K FCG resistance is increased by overaging. In the presence of moisture at intermediate delta K levels, increasing Cu content from 1.0 to 2.3% increases crack growth resistance. However, there is no consistent effect of Cu content on near-threshold fatigue performance. Similarly, no clear influence of dispersoid type (Cr vs. Zr) on low delta K FCG resistance was detected. Increasing alloy purity (lowering Fe, Si content) enhances crack growth resistance at high delta K, but has no effect at near-threshold stress intensities. The importance of near-threshold FCG performance to alloy design and materials selection for fatigue resistance is discussed. Potential tradeoffs between design philosophies which emphasize damage tolerance characteristics vs. those which focus on improved life cycle economics are examined.
Author : G. Lüutjering
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (125 download)
Download or read book Sequence Effects on Fatigue Crack Propagation; Mechanical and Microstructural Contributions written by G. Lüutjering and published by . This book was released on 1979 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fatigue crack propagation of high strength aluminum alloys subjected to variable amplitude loading is strongly influenced by sequence effects. For a reliable evaluation of the sequence effects, an exact knowledge of the changes in the mechanical and physical conditions of the material surrounding the crack becomes necessary. To allow greater understanding of these processes, two aspects which are based on recent crack propagation investigations are considered in the present study.
Author : T. H Sanders (Jr)
Publisher :
ISBN 13 :
Total Pages : 252 pages
Book Rating : 4.:/5 (227 download)
Download or read book Effect of Microstructure on Fatigue Crack Growth of 7XXX Aluminum Alloys Under Constant Amplitude and Spectrum Loading written by T. H Sanders (Jr) and published by . This book was released on 1978 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation was made to identify microstructural features which control the fatigue crack growth characteristics of 7XXX aluminum alloys. Constant amplitude and simple overload tests were conducted in humid air on controlled microstructural variations of alloys 7075 and 7050. Results indicated that relative influence of different microstructural features and ranking of the alloys based on fatigue crack propagation resistance depend on loading conditions.
Author : Ignacy Telesman
Publisher :
ISBN 13 :
Total Pages : 392 pages
Book Rating : 4.:/5 (15 download)
Download or read book Effect of Microstructural Characteristics and Load History on Fatigue Crack Growth in 7050 and X7091 Aluminum Alloys written by Ignacy Telesman and published by . This book was released on 1983 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Yan Jin
Publisher :
ISBN 13 :
Total Pages : 156 pages
Book Rating : 4.:/5 (1 download)
Download or read book Three-dimensional Microstructural Effects on Multi-site Fatigue Crack Nucleation Behaviors of High Strength Aluminum Alloys written by Yan Jin and published by . This book was released on 2016 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Aluminum Company of America
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (499 download)
Download or read book Effect of Microstructure on Fatigue Crack Growth of 7XXX Aluminum Alloys Under Constant Amplitude and Spectrum Loading written by Aluminum Company of America and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Edward James Coyne
Publisher :
ISBN 13 :
Total Pages : 162 pages
Book Rating : 4.:/5 (32 download)
Download or read book The Effect of Microstructure on the Fatigue Crack Propagation Behavior of an Aluminum-zinc-magnesium-zirconium Alloy written by Edward James Coyne and published by . This book was released on 1977 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David Andrew Downham
Publisher :
ISBN 13 :
Total Pages : 91 pages
Book Rating : 4.:/5 (11 download)
Download or read book Effect of Microstructure on Short Fatigue Crack Initiation and Growth in Aluminium Alloys written by David Andrew Downham and published by . This book was released on 1986 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : PE. Bretz
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (125 download)
Download or read book Fatigue Crack Growth Behavior of 7XXX Aluminum Alloys Under Simple Variable Amplitude Loading written by PE. Bretz and published by . This book was released on 1984 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This investigation examines the influence of temper and purity on the fatigue crack growth (FCG) behavior of four 7XXX aluminum alloys (7075-T6, 7075-T7, 7050-T6, 7050-T7) tested using a periodic single overload spectrum at low stresses. The loading sequence consists of a periodic single overload spike occurring once every 8000 constant amplitude cycles; the overload spike is 1.8 times the constant amplitude load peak. All tests have been performed in high humidity (>90% relative humidity) air at a frequency of 20 Hz and a constant amplitude load ratio of R = 0.33. The observed microstructural effects on transient (that is, spectrum) FCG behavior are contrasted with those for steady-state (constant load amplitude) fatigue performance.
Author :
Publisher :
ISBN 13 :
Total Pages : 892 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christopher L. Muhlstein
Publisher :
ISBN 13 :
Total Pages : 228 pages
Book Rating : 4.:/5 (348 download)
Download or read book The Effect of Temperature and Microstructure on the Fatigue Crack Growth Behavior of AL-Cu Alloy C415 written by Christopher L. Muhlstein and published by . This book was released on 1996 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : H. L. Marcus
Publisher :
ISBN 13 :
Total Pages : 106 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Influence of Hold Times on Fatigue Crack Growth of Aluminum Alloys written by H. L. Marcus and published by . This book was released on 1980 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of the research on fatigue crack growth in aluminum alloys are described in three general areas. The first relates the influence of hold time at an underload that follows an overload on the fatigue crack growth retardation behavior of the 7075 and 2219 aluminum alloys. A very distinct effect on retardation with hold time is observed. The effect is microstructure dependent with the time dependence behavior extending over a longer period for the high strength materials. This well-defined time dependence clearly shows that lifetime predictions based on accelerated short hold time tests could be very non-conservative. The influence of humidity was also determined using vacuum as a reference environment. The second aspect of the research investigated the nature of the residual displacement, d, that leads to the crack closure phenomena. The last major emphasis was to investigate how gaseous environments interact with fatigue crack growth in aluminum alloys. Combined AES/SIMS studies were made of fracture surfaces taken from fatigue crack growth specimens fatigued in vacuum and subsequently exposed to and fatigued in a range of environments.
