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Influence Of Corrosion On The Fatigue Properties Of Al 7075 T6
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Book Synopsis Influence of Corrosion on the Fatigue Properties of Al 7075-T6 by : ML. Du
Download or read book Influence of Corrosion on the Fatigue Properties of Al 7075-T6 written by ML. Du and published by . This book was released on 1998 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chloride ion attack on Al 7075-T6 in aqueous hydrochloric acid leads to localized corrosion and subsequent initiation of fatigue cracks on the surface. Pitting is observed when the specimen is exposed to a corrosive environment. Microcracks, voids, extrusions, and intrusions are then formed during the fatigue process. From a global viewpoint, all of the corrosion and fatigue damage appears to be randomly oriented, resulting in a change in the surface roughness. The Laser Speckle Sensor technique is used to detect the minute surface texture change, associated with the damage caused by corrosion and fatigue. Nonuniform surface roughness is observed due to corrosion. The corrosion pits tend to coalesce along the rolling direction. The change in surface roughness is significant around the crack tip during the fatigue process. As a result there are synergistic activities; the surface roughness caused by corrosion and fatigue leads to crack initiation, and the crack growth further increases surface roughness.
Book Synopsis Influence of Precorrosion on Fatigue Properties of Shot-Peened Aluminium 7075-T651 by : U. Zupanc
Download or read book Influence of Precorrosion on Fatigue Properties of Shot-Peened Aluminium 7075-T651 written by U. Zupanc and published by . This book was released on 2011 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pitting corrosion has a major influence on aging of structural elements made of high-strength aluminium alloys as corrosion pits lead to much earlier fatigue crack initiation under tensile dynamic loading. In order to improve material resistance to corrosion fatigue, it is necessary to reduce pit-tip stresses in the corroded pits areas. Shot peening (SP) is an important and well-known cold working process, having been used in industrial applications for a long time. Shot peening as intense plastic deformation in the thin surface layer affects cold surface hardening by primary inducing favorable residual compressive stresses. It is used in order to increase fatigue strength in operation and to improve fatigue resistance of precorroded material. The paper deals with the surface integrity of shot-peened high-strength 7075-T651 aluminium alloy. The paper describes the effects of SP treatment by presenting analyses of surface roughness measurement, residual stresses, material bending fatigue resistance, fractographic analysis of fatigued specimens, and electrochemical potentiodynamic testing.
Book Synopsis The Effect of Mean Stress and Environment on Corrosion Fatigue Behavior of 7075-T6 Aluminum by : L. V. Corsetti
Download or read book The Effect of Mean Stress and Environment on Corrosion Fatigue Behavior of 7075-T6 Aluminum written by L. V. Corsetti and published by . This book was released on 1973 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Axial fatigue tests were performed on a 7075-T6 aluminum alloy in tension-compression and under superimposed positive mean stresses in dry air and in aqueous 0.5N NaCl solution. Both corrosive environments and positive mean stresses resulted in lower fatigue lives but no interaction between these variables was observed. Crack initiation in air occurred at electropolish pits at inclusion/alloy interfaces and propagated primarily in a Stage I (crystallographic) mode. A model for environment assisted cracking is presented which suggests that hydrogen induced cleavage is responsible for the degradation in fatigue properties of this alloy. (Modified author abstract).
Book Synopsis The Effects of Combined Prior Stress and Atmospheric Corrosion on the Fatigue Life of Aluminum Alloys by : Herbert A. Leybold
Download or read book The Effects of Combined Prior Stress and Atmospheric Corrosion on the Fatigue Life of Aluminum Alloys written by Herbert A. Leybold and published by . This book was released on 1964 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Impact of Corrosion on Fatigue Crack Propagation in 7075-T6 Aluminum Alloy by : Tuong Tom Quang Vu
Download or read book The Impact of Corrosion on Fatigue Crack Propagation in 7075-T6 Aluminum Alloy written by Tuong Tom Quang Vu and published by . This book was released on 1999 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 The Effects of Exfoliation Corrosion on the Fatigue Response of 7075-T651 Aluminum Alloy by : Thomas Brian Mills
Download or read book The Effects of Exfoliation Corrosion on the Fatigue Response of 7075-T651 Aluminum Alloy written by Thomas Brian Mills and published by . This book was released on 1995 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pit Morphology and Effect of Prior Pitting Corrosion on Fatigue Life in 7075-T6 and 7075-T6 Extruded Aluminum Alloys by : Mehmet Fatih Oktem
Download or read book Pit Morphology and Effect of Prior Pitting Corrosion on Fatigue Life in 7075-T6 and 7075-T6 Extruded Aluminum Alloys written by Mehmet Fatih Oktem and published by . This book was released on 2005 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Corrosion, Temperature, and Overload on Fatigue Crack Growth Rate Retardation in 7075-T651 Aluminum Alloy by : Mikio Scot Oshiro
Download or read book Effects of Corrosion, Temperature, and Overload on Fatigue Crack Growth Rate Retardation in 7075-T651 Aluminum Alloy written by Mikio Scot Oshiro and published by . This book was released on 2000 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Preexisting Corrosion on Fatigue Cracking of Aluminum Alloys 2024-T3 and 7075-T6 by :
Download or read book Effect of Preexisting Corrosion on Fatigue Cracking of Aluminum Alloys 2024-T3 and 7075-T6 written by and published by . This book was released on 1995 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: A significant number of commercial and military aircraft have reached or exceeded their original design life, and fleet surveys have shown that the major problem of corrosion is increasing with the fleet's age. Corrosion can affect an airframe's structural integrity in three different ways. First, corrosion has a direct effect on aircraft structures by causing metal loss, which affects the residual strength, and thereby reduces the structural integrity of aircraft components. Secondly, corrosion can act in conjunction with mechanical stresses, resulting in cracking phenomena such as stress-corrosion cracking (SCC) and corrosion-fatigue cracking (CFC). Thirdly, with the aging of the fleet, the interaction between preexisting corrosion and fatigue cracking may affect safety and durability of structural aircraft components.
Book Synopsis Corrosion and Corrosion-fatigue Behavior of 7075 Aluminum Alloys Studied by in Situ X-ray Tomography by : Tyler Stannard
Download or read book Corrosion and Corrosion-fatigue Behavior of 7075 Aluminum Alloys Studied by in Situ X-ray Tomography written by Tyler Stannard and published by . This book was released on 2017 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: 7XXX aluminum alloys have high strength to weight ratio and low cost. They are used in many critical structural applications including automotive and aerospace components. These applications frequently subject the alloys to static and cyclic loading in service. Additionally, the alloys are often subjected to aggressive corrosive environments such as saltwater spray. These chemical and mechanical exposures have been known to cause premature failure in critical applications. Hence, the microstructural behavior of the alloys under combined chemical attack and mechanical loading must be characterized further. Most studies to date have analyzed the microstructure of the 7XXX alloys using two dimensional (2D) techniques. While 2D studies yield valuable insights about the properties of the alloys, they do not provide sufficiently accurate results because the microstructure is three dimensional and hence its response to external stimuli is also three dimensional (3D). Relevant features of the alloys include the grains, subgrains, intermetallic inclusion particles, and intermetallic precipitate particles. The effects of microstructural features on corrosion pitting and corrosion fatigue of aluminum alloys has primarily been studied using 2D techniques such as scanning electron microscopy (SEM) surface analysis along with post-mortem SEM fracture surface analysis to estimate the corrosion pit size and fatigue crack initiation site. These studies often limited the corrosion-fatigue testing to samples in air or specialized solutions, because samples tested in NaCl solution typically have fracture surfaces covered in corrosion product. Recent technological advancements allow observation of the microstructure, corrosion and crack behavior of aluminum alloys in solution in three dimensions over time (4D). In situ synchrotron X-Ray microtomography was used to analyze the corrosion and cracking behavior of the alloy in four dimensions to elucidate crack initiation at corrosion pits for samples of multiple aging conditions and impurity concentrations. Additionally, chemical reactions between the 3.5 wt% NaCl solution and the crack surfaces were quantified by observing the evolution of hydrogen bubbles from the crack. The effects of the impurity particles and age-hardening particles on the corrosion and fatigue properties were examined in 4D.
Book Synopsis Effect of Production Processes on Fatigue Strength of Aluminum Alloy 7075-T6 by : Stuart Herbert Myhre
Download or read book Effect of Production Processes on Fatigue Strength of Aluminum Alloy 7075-T6 written by Stuart Herbert Myhre and published by . This book was released on 1956 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of the Prior Corrosion Effects on the Fatigue Behavior of 7075-T651 and 2024-T351 Aluminum Alloy Specimens with and Without Cold Worked Fastener Hole by : Young In Yoon
Download or read book Evaluation of the Prior Corrosion Effects on the Fatigue Behavior of 7075-T651 and 2024-T351 Aluminum Alloy Specimens with and Without Cold Worked Fastener Hole written by Young In Yoon and published by . This book was released on 2000 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Influence of Heat Treatment and Composition of the Stress Corrosion, Fatigue, and Fracture Properties of 7075-type Aluminum Alloys by : Michael V. Hyatt
Download or read book The Influence of Heat Treatment and Composition of the Stress Corrosion, Fatigue, and Fracture Properties of 7075-type Aluminum Alloys written by Michael V. Hyatt and published by . This book was released on 1967 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Combined Effects of Prior-corrosion and Aggressive Chemical Environments on Fatigue Crack Growth Behavior in Aluminum Alloy 7075-T651 by : Thomas Brian Mills
Download or read book The Combined Effects of Prior-corrosion and Aggressive Chemical Environments on Fatigue Crack Growth Behavior in Aluminum Alloy 7075-T651 written by Thomas Brian Mills and published by . This book was released on 1997 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Service Usage on Tensile, Fatigue, and Fracture Properties of 7075-T6 and 7178-T6 Aluminum Alloys by : Richard A. Everett
Download or read book Effect of Service Usage on Tensile, Fatigue, and Fracture Properties of 7075-T6 and 7178-T6 Aluminum Alloys written by Richard A. Everett and published by . This book was released on 1975 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Low Cycle Corrosion Fatigue of a 7075-T6 Aluminum Alloy by : Robert John Urban
Download or read book Low Cycle Corrosion Fatigue of a 7075-T6 Aluminum Alloy written by Robert John Urban and published by . This book was released on 1975 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
