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Fatigue Behavior In An Aluminum Casting Alloy A3562 Effects Of Some Defectssdas Hipping And Strontium Modification Phd
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Book Synopsis Fatigue Behavior in an Aluminum Casting Alloy (A356.2): Effects of Some Defects,SDAS, Hipping and Strontium Modification (PHD). by : Bin Zhang
Download or read book Fatigue Behavior in an Aluminum Casting Alloy (A356.2): Effects of Some Defects,SDAS, Hipping and Strontium Modification (PHD). written by Bin Zhang and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Behavior of A356 Aluminum Alloy by : Phalgun Nelaturu
Download or read book Fatigue Behavior of A356 Aluminum Alloy written by Phalgun Nelaturu and published by . This book was released on 2016 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal fatigue is a recurring problem for metallurgists and materials engineers, especially in structural applications. It has been responsible for many disastrous accidents and tragedies in history. Understanding the micro-mechanisms during cyclic deformation and combating fatigue failure has remained a grand challenge. Environmental effects, like temperature or a corrosive medium, further worsen and complicate the problem. Ultimate design against fatigue must come from a materials perspective with a fundamental understanding of the interaction of microstructural features with dislocations, under the influence of stress, temperature, and other factors. This research endeavors to contribute to the current understanding of the fatigue failure mechanisms. Cast aluminum alloys are susceptible to fatigue failure due to the presence of defects in the microstructure like casting porosities, non-metallic inclusions, non-uniform distribution of secondary phases, etc. Friction stir processing (FSP), an emerging solid state processing technique, is an effective tool to refine and homogenize the cast microstructure of an alloy. In this work, the effect of FSP on the microstructure of an A356 cast aluminum alloy, and the resulting effect on its tensile and fatigue behavior have been studied. The main focus is on crack initiation and propagation mechanisms, and how stage I and stage II cracks interact with the different microstructural features. Three unique microstructural conditions have been tested for fatigue performance at room temperature, 150 °C and 200 °C. Detailed fractography has been performed using optical microscopy, scanning electron microscopy (SEM) and electron back scattered diffraction (EBSD). These tools have also been utilized to characterize microstructural aspects like grain size, eutectic silicon particle size and distribution. Cyclic deformation at low temperatures is very sensitive to the microstructural distribution in this alloy. The findings from the room temperature fatigue tests highlight the important role played by persistent slip bands (PSBs) in fatigue crack initiation. At room temperature, cracks initiate along PSBs in the absence of other defects/stress risers, and grow transgranularly. Their propagation is retarded when they encounter grain boundaries. Another major finding is the complete transition of the mode of fatigue cracking from transgranular to intergranular, at 200 °C. This occurs when PSBs form in adjacent grains and impinge on grain boundaries, raising the stress concentration at these locations. This initiates cracks along the grain boundaries. At these temperatures, cyclic deformation is no longer microstructure- dependent. Grain boundaries don't impede the progress of cracks, instead aid in their propagation. This work has extended the current understanding of fatigue cracking mechanisms in A356 Al alloys to elevated temperatures.
Book Synopsis Environmental Corrosion-fatigue Behavior of Aluminum Alloys by : D. N. Williams
Download or read book Environmental Corrosion-fatigue Behavior of Aluminum Alloys written by D. N. Williams and published by . This book was released on 1970 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of environment on fatigue behavior are quite intimately related to such test variables as stress intensity, cyclic frequency, and temperature. The effect of these variables has been shown to be quite complex. However, a consistent pattern of behavior is beginning to emerge which, it is hoped, will lead to a considerably changed understanding of the corrosion-fatigue process. It is considered probable that an increased understanding of the corrosion-fatigue process will also contribute measureably to an improved understanding of general fatigue processes. Material variables such as composition, directionality of properties, and microstructure, have important effects on corrosion-fatigue behavior of aluminum alloys. However, it appears that these variables, at least in gaseous environments, may be important largely because of their effects on the mechanical behavior of aluminum alloys. On the other hand, studies in seawater suggest that these variables become increasingly important as the corrosive nature of the environment increases. This memorandum discusses in detail the effects of both test variables and material variables on corrosion fatigue. In addition, current theories of corrosion-fatigue mechanisms are outlined, and several methods of preventing corrosion fatigue are suggested. (Author).
Book Synopsis Fatigue of Materials III by : T. S. Srivatsan
Download or read book Fatigue of Materials III written by T. S. Srivatsan and published by John Wiley & Sons. This book was released on 2014-12-01 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains papers presented in the third international symposium titled Fatigue of Materials: Advances and Emergences in Understanding held during the Materials Science and Technology 2014 meeting in Pittsburgh, Pennsylvania, USA, in October 2014. The book contains contributions from engineers, technologists, and scientists from academia, research laboratories, and industries. The 19 papers are divided into five topical areas: Session 1: Aluminum Alloys Session 2: Ferrous Materials I Session 3: Ferrous Materials II Session 4: Composite Materials Session 5: Advanced Materials Session 6: Modeling The papers cover a broad spectrum of topics that represent the truly diverse nature of the subject of fatigue as it relates to the world of materials.
Book Synopsis Effects of Changing Stress Amplitude on the Rate of Fatigue-crack Propagation in Two Aluminum Alloys by : C. M. Hudson
Download or read book Effects of Changing Stress Amplitude on the Rate of Fatigue-crack Propagation in Two Aluminum Alloys written by C. M. Hudson and published by . This book was released on 1961 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of fatigue tests with specimens subjected to constant amplitude and two-step axial loads were conducted on 12-inch-wide sheet specimens of 2024-T3 and 7075-T6 aluminum alloy to study the effects of a change in stress level on fatigue-crack propagation. Comparison of the results of the tests in which the specimens were tested at first a high and then a low stress level with those of the constant-stress-amplitude tests indicated that crack propagation was generally delayed after the transition to the lower stress level. In the tests in which the specimens were tested at first a low and then a high stress level, crack propagation continued at the expected rate after the change in stress levels.
Book Synopsis Effect of Microstructure and Defects on the Fatigue Behaviour of Cast A356-T6 Aluminium-silicon Alloy by :
Download or read book Effect of Microstructure and Defects on the Fatigue Behaviour of Cast A356-T6 Aluminium-silicon Alloy written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Behavior of Aluminum Alloy Weldments by : FV. Lawrence
Download or read book Fatigue Behavior of Aluminum Alloy Weldments written by FV. Lawrence and published by . This book was released on 1978 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last eight years, a number of research studies have been conducted on the fatigue behavior of aluminum alloy weldments under the guidance of the Aluminum Alloys Committee of the Welding Research Council. The initial study was a comprehensive review of the current (1970) state of knowledge and the development of research needs. The additional studies have included investigations into the effect of weld orientation (longitudinal versus transverse), thickened plates, and weld defects on fatigue behavior. This paper provides a summary of these five studies.
Book Synopsis The Role of Casting Defects in the Fatigue Behavior of Notched Cast Aluminum Alloys by :
Download or read book The Role of Casting Defects in the Fatigue Behavior of Notched Cast Aluminum Alloys written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Variability of Fatigue Crack Growth Life of Aluminum Casting Alloy A357-T6 by :
Download or read book The Variability of Fatigue Crack Growth Life of Aluminum Casting Alloy A357-T6 written by and published by . This book was released on 1986 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: This investigation considers the variability of fatigue crack growth (FCG) life of A357-T6. the life variability for this cast aluminum alloy is greater than the variability of 2024-T3, a wrought aluminum alloy. Dendrite arm spacing (DAS), dendrite cell size (DCS), porosity and silicon particle aspect ratios are measured to characterize the test specimens. Metallographic and fractographic analyses are performed to aid potential correlations between microstructure and discontinuities and fatigue behavior. Several recommendations are made for future efforts.
Book Synopsis Fatigue Behavior of A356-T6 Cast Aluminum Alloy by : Curt C. Wigant
Download or read book Fatigue Behavior of A356-T6 Cast Aluminum Alloy written by Curt C. Wigant and published by . This book was released on 1986 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Porosity on the Fatigue Behavior of Aluminum Alloy Weldments by : F. V. Lawrence
Download or read book Effects of Porosity on the Fatigue Behavior of Aluminum Alloy Weldments written by F. V. Lawrence and published by . This book was released on 1973 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: It appears that the characteristics of the toe of the weld controls the fatigue crack initiation and propagation phenomena in the as welded specimens; and the size, and distribution and possibly location of the largest pore(s) control the fatigue crack initiation and propagation phenomena in weld reinforcement removed specimens.
Book Synopsis Fatigue Behavior of Aluminum Alloy Weldments by : Wallace Wolfred Sanders
Download or read book Fatigue Behavior of Aluminum Alloy Weldments written by Wallace Wolfred Sanders and published by . This book was released on 1972 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Comparison of the Fatigue Behavior of High Strength Cast Aluminum Alloys 201 and A357 by : K. J. Oswalt
Download or read book A Comparison of the Fatigue Behavior of High Strength Cast Aluminum Alloys 201 and A357 written by K. J. Oswalt and published by . This book was released on 1971 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The notched fatigue strength of high strength aluminum casting alloys A357 and 201 was evaluated using separately cast round tensile bar coupons. These results are considered satisfactory for comparison purposes of the alloys, but should not be used for design criteria. The results are plotted in the form of S/N curves. The materials are also compared by ultimately failing the surviving fatigue specimens in tension and then by comparing microstructures of the test specimens exhibiting highest and lowest ultimate tensile strengths. The notched tensile strength of 201 was higher than A357; notched strength values of 201 specimens were reduced by partial eutectic melting and undissolved eutectic in grain boundary regions.
Book Synopsis Fatigue Behavior of Aluminum Alloy Weldments by : Wallace Wolfred Sanders
Download or read book Fatigue Behavior of Aluminum Alloy Weldments written by Wallace Wolfred Sanders and published by . This book was released on 1983 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Investigation of Fatigue Crack Growth Behavior in Cast Particulate Reinforced Aluminum Alloys by : Anthony George Keslinke
Download or read book An Investigation of Fatigue Crack Growth Behavior in Cast Particulate Reinforced Aluminum Alloys written by Anthony George Keslinke and published by . This book was released on 1990 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Behavior of 5000 Series Aluminum Alloy Weldments in Marine Environment by : Wallace Wolfred Sanders
Download or read book Fatigue Behavior of 5000 Series Aluminum Alloy Weldments in Marine Environment written by Wallace Wolfred Sanders and published by . This book was released on 1978 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Properties of Aluminum Alloys by : John Gilbert Kaufman
Download or read book Properties of Aluminum Alloys written by John Gilbert Kaufman and published by ASM International(OH). This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents one of the most comprehensive collections of fatigue data yet available for aluminum alloys, tempers, and products. The data are presented in a consistent format, conveniently arranged by alloy and temper. These data were developed and recorded under consistent conditions and using standard procedures, so valid comparisons can be made among the alloys in the data sets.
