Download or read book Fatigue Crack Growth in Ti 6Al 4V from Threshold to Unstable Fracture written by Maurice F. Amateau and published by . This book was released on 1973 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fatigue crack growth of Ti-6Al-4V in the diffusion bond annealed condition was examined in the range of growth rates from 10 to the minus 12th power to 10 to the minus 4th power m/cycle with the use of compact tension and part-through-crack specimens. The effects of cyclic frequency and maximum stress were investigated. Fractured surfaces were examined by scanning electron microscopy over the entire range of crack growth. The fatigue data were fit empirically to a number of crack propagation laws, none of which was able to predict the entire range of crack growth from threshold to unstable fracture. When the fatigue crack growth rates were compared with those of Ti-6Al-4V of other microstructures, it was found that the diffusion bond annealed was among the most fatigue crack resistant of any microstructure examined. (Author).

Download or read book An Investigation of the Fatigue Crack Growth and Fracture Behavior of Ti 6Al 4V written by Michael Alan Foster and published by . This book was released on 1998 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fatigue Crack Growth Threshold Concept and Test Results for Al and Ti Alloys written by G. Marci and published by . This book was released on 2000 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fact that fatigue crack propagation (FCP) rates approach zero asymptotically as the fracture mechanics loading parameter ?K decreases toward certain limiting values is the reason for the scientific interest in these so-called 'threshold' values. In respect to the practical use of these 'limiting values', the author divides them into two groups, namely in 'non-propagation conditions' ?Kth and in a material property 'FCP-threshold' ?KT. It is shown that ?KT must be an integral part in the functional correlation between FCP-rates and the cyclic loading conditions expressed in ?Keff. The experimental determination of ?Kth on six Al-alloys and four Ti-compressor disk alloys show that ?KT exists for all the alloys investigated. The effect of temperature on ?KT was investigated on one Ti 6Al 4V- and one Ti 8Al 1V 1Mo disk material at room temperature (RT) and 260°C and at RT, 260°C and 360°C, respectively. No temperature effect on ?KT was found for the temperature range investigated.

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 1288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fatigue Crack Growth and J Integral Fracture Parameters of Ti 6Al 4V at Ambient and Cryogenic Temperatures written by RL. Tobler and published by . This book was released on 1976 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue crack propagation and fracture parameters for 2.03-cm-thick compact specimens of an extra-low-interstitial Ti-6Al-4V alloy were measured at temperatures between 295 K (70°F) and 4 K (-453°F). Plane-strain linear-elastic and J-integral fracture toughness test results were in good agreement: the KIc values for this alloy decreased from 105 MN/m3|2 at room temperature to 54 MN/m3vb2 at 4 K, and a ductile-to-brittle fracture transition occurred in the range 125 to 76 K (-235 to -323°F). Despite this transition, the fatigue crack growth rates (da/dN) of this alloy remained temperature insensitive over the entire ambient-to-cryogenic range. These fatigue and fracture results are compared with data previously reported for a normal-interstitial Ti-6Al-4V alloy.

Download or read book Fatigue Crack Growth written by Hans Albert Richard and published by Springer. This book was released on 2016-06-13 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a concise introduction to fatigue crack growth, based on practical examples. It discusses the essential concepts of fracture mechanics, fatigue crack growth under constant and variable amplitude loading and the determination of the fracture-mechanical material parameters. The book also introduces the analytical and numerical simulation of fatigue crack growth as well as crack initiation. It concludes with a detailed description of several practical case studies and some exercises. The target group includes graduate students, researchers at universities and practicing engineers.

Download or read book Fatigue Crack Growth Measurement and Data Analysis written by S. J. Hudak and published by ASTM International. This book was released on 1981 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fractography Microscopic Cracking Process written by Cedric D. Beachem and published by ASTM International. This book was released on 1976 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanics of Fatigue Crack Closure written by Wolf Elber and published by ASTM International. This book was released on 1988 with total page 671 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

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.

Download or read book Proceedings of the 15th International Ship and Offshore Structures Congress written by A.E Mansour and published by Elsevier. This book was released on 2003-06-26 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: KEY FEATURES: - Provides researchers in Ocean engineering with a thorough review of the latest research in the field - Lengthy reports by leading experts - A valuable resource for all interested in ocean engineering DESCRIPTION:The International Ship and Offshore Congress (ISSC) is a forum for the exchange of information by experts undertaking and applying marine structural research. These three volumes contain the eight technical committee reports, six Specialist Committee and 2 Special Task Committee reports which were presented for the 15th International Ship and Offshore Structures Congress (ISSC 2004) in San Diego USA, between 11th and 15th August 2003. Volume III will be published in 2004 and is to contain the discussion of the reports, the chairmen's reply, the text of the invited Lecture and the congress report of ISSC 2003.

Download or read book Engineering Fundamentals and Environmental Effects written by H. Liebowitz and published by Academic Press. This book was released on 2014-05-12 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fracture: An Advanced Treatise, Volume III: Engineering Fundamentals and Environmental Effects provides information pertinent to the engineering fundamentals and environmental effects pertaining to various types of fracture. This book focuses on the fracture design of structures as well as the engineering fundamentals of fracture and environmental effects. Organized into 12 chapters, this volume begins with an overview of the analytical aspects of linear fracture mechanics, which are complete relative to basic formulation and two-dimensional static problems. This text then reviews the fundamental equations of the statics of solids, with emphasis on the idealization of behavior into elastic, plastic, or viscoelastic types. Other chapters consider a notch analysis of fracture. This book discusses as well the three phases of the fracture process. The final chapter deals with environment cracking under static load. This book is a valuable resource for engineers, students, and research workers in industrial organizations, education and research institutions, and various government agencies.

Download or read book Fatigue Crack Growth written by R. A. Smith and published by Pergamon. This book was released on 1986 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fatigue Damage Crack Growth and Life Prediction written by F. Ellyin and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue failure is a multi-stage process. It begins with the initiation of cracks, and with continued cyclic loading the cracks propagate, finally leading to the rupture of a component or specimen. The demarcation between the above stages is not well-defined. Depending upon the scale of interest, the variation may span three orders of magnitude. For example, to a material scientist an initiated crack may be of the order of a micron, whereas for an engineer it can be of the order of a millimetre. It is not surprising therefore to see that investigation of the fatigue process has followed different paths depending upon the scale of phenomenon under investigation. Interest in the study of fatigue failure increased with the advent of industrial ization. Because of the urgent need to design against fatigue failure, early investiga tors focused on prototype testing and proposed failure criteria similar to design formulae. Thus, a methodology developed whereby the fatigue theories were proposed based on experimental observations, albeit at times with limited scope. This type of phenomenological approach progressed rapidly during the past four decades as closed-loop testing machines became available.

Download or read book Japanese Science and Technology 1983 1984 written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch and published by . This book was released on 1985 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt: