Download or read book The Fatigue and Corrosion Fatigue Behavior of Austenitic Stainless Steel AISI 304 After Deep Rolling at Various Temperatures written by Juthathip Kongthep and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Temperature Fatigue Behaviour of Austenitic Stainless Steel written by Hugo Wärner and published by Linköping University Electronic Press. This book was released on 2018-12-20 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: The global energy consumption is increasing and together with global warming from greenhouse gas emission, create the need for more environmental friendly energy production processes. Higher efficiency of biomass power plants can be achieved by increasing temperature and pressure in the boiler section and this would increase the generation of electricity along with the reduction in emission of greenhouse gases e.g. CO2. The power generation must also be flexible to be able to follow the demands of the energy market, this results in a need for cyclic operating conditions with alternating output and multiple start-ups and shut-downs. Because of the demands of flexibility, higher temperature and higher pressure in the boiler section of future biomass power plants, the demands on improved mechanical properties of the materials of these components are also increased. Properties like creep strength, thermomechanical fatigue resistance and high temperature corrosion resistance are critical for materials used in the next generation biomass power plants. Austenitic stainless steels are known to possess such good high temperature properties and are relatively cheap compared to the nickel-base alloys, which are already operating at high temperature cyclic conditions in other applications. The behaviour of austenitic stainless steels during these widened operating conditions are not yet fully understood. The aim of this licentiate thesis is to increase the knowledge of the mechanical behaviour at high temperature cyclic conditions for austenitic stainless steels. This is done by the use of thermomechanical fatigue- and creepfatigue testing at elevated temperatures. For safety reasons, the effect of prolonged service degradation is investigated by pre-ageing before mechanical testing. Microscopy is used to investigate the microstructural development and resulting damage behaviour of the austenitic stainless steels after testing. The results show that creep-fatigue interaction damage, creep damage and oxidation assisted cracking are present at high temperature cyclic conditions. In addition, simulated service degradation resulted in a detrimental embrittling effect due to the deterioration by the microstructural evolution.

Download or read book The Effect of Environment Chemistry and Microstructure on the Corrosion Fatigue Behavior of Austenitic Stainless Steels in High Temperature Water written by Lindsay Beth O'Brien and published by . This book was released on 2014 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of sulfur on the corrosion fatigue crack growth of austenitic stainless steel was evaluated under Light Water Reactor (LWR) conditions of 288°C deaerated (less than 5ppb O2) water, to shed light on the accelerating effect of the LWR environment and to explore the effect of high sulfur content on the retardation of fatigue crack growth rates. Fatigue tests were performed using a trapezoidal loading pattern with rise times of 5.1, 51, 510, and 5100 seconds (fall time of 0.9, 9, 90, and 900 seconds), with Kmzx of 28.6 or 31.9 MPa[mathematical symbol]m and stress ratios (R, Pmin/Pmax) of 0.4 or 0.7. Two test materials were used to evaluate the effect of sulfur: (1) a low sulfur (

Download or read book Fatigue Behavior in Austenitic Stainless Steels in High temperature Water written by Jean Laverty Smith and published by . This book was released on 2006 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Combined Effects of Temperature and Irradiation on the Mechanical Properties of Austenitic Stainless Steels written by J. E. Irvin and published by . This book was released on 1965 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1992 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Atlas of Stress corrosion and Corrosion Fatigue Curves written by A. J. McEvily and published by ASM International(OH). This book was released on 1990 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: A reference for materials scientists that can be used to find the effects of various corrosive media and processing variables on the stress-corrosion cracking and corrosion fatigue characteristics of ferrous and nonferrous alloys. There are more than 500 stress/cracking-time curves, S/N curves, and

Download or read book The Environmental Effect on Corrosion Fatigue Behavior of Austenitic Stainless Steels written by Lun Yu (Ph. D.) and published by . This book was released on 2017 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion fatigue is a multivariate challenge that threatens the lifetime of service of nuclear power plant materials, especially austenitic stainless steels. Both enhancement and retardation of crack growth have been observed in laboratory tests. This thesis work performs high temperature autoclave testing, post-test characterization and mechanistic modeling to understand the corrosion fatigue behavior of austenitic stainless steels in simulated light water reactor (LWR) environments. Crack growth rate (CGR) data were generated from the autoclave testing on low (0.001 wt.%) and high (0.03 wt.%) sulfur content heat 1T compact tension (CT) specimens. Tests were controlled under constant K (22-35 MPa [square root of]m) with load ratio of 0.7 and sawtooth waveform (85% rise vs. 15% fall), and at pH =10 and 288 °C with system pressure of 9.54 MPa. Crack enhancement was observed in low sulfur content heat specimens, and the CGR increases as the loading rise time increases. The fracture surfaces of low sulfur content heat specimens showed transgranular features with facets ("river pattern") and few oxide particles. Crack retardation was observed in high sulfur content heat specimens, and the CGR decreases as the loading rise time increases. The fracture surfaces of high sulfur content heat specimens showed distinct features at different rise time step. Transgranular features ("river pattern") were observed at short rise time step, while non-descript surfaces with fine octahedral oxide particles were observed at long rise time step. Additionally, tests in deuterium water were performed to enable measurements on hydrogen/deuterium concentrations in specimens using ToF-SIMS and hot vacuum extraction techniques. Deuterium pick-up from the testing environment was observed, and the enrichment of deuterium/hydrogen ahead of crack tip was also observed. Controlled experiments were also conducted, where specimens were baked prior to the autoclave testing to remove the residual internal hydrogen. Such heat treatment removing the internal hydrogen was found to not affect the crack growth behavior. Dissolved gases, hydrogen and argon respectively, were bubbled into system during the autoclave tests, and they resulted in similar crack growth behaviors. Modeling indicates that there exists an enhancement mechanism other than corrosion mass removal driving the crack growth in simulated LWR environments. Possibly it comes from the effect of corrosion-generated hydrogen. Retardation behavior and experimental observations could be understood and explained by concept and modeling of corrosion blunting. The results suggest excess conservatism of current ASME standards N-809 for high sulfur content austenitic stainless steels.

Download or read book Fatigue Tensile and Relaxation Behavior of Stainless Steels written by Joseph B. Conway and published by . This book was released on 1975 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fatigue at Elevated Temperatures written by and published by ASTM International. This book was released on 1973 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stress Corrosion Cracking of Austenitic Stainless Steel written by McIntyre R. Louthan and published by . This book was released on 1964 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Statistical Models of Mean Stress and Water Environment Effects on the Fatigue Behavior of 304 Stainless Steel written by and published by . This book was released on 1999 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent research efforts have focused on characterizing the effects of light water reactor environments on the fatigue behavior of austenitic stainless steels. In conjunction with these experimental programs, there has been a significant effort at Argonne National Laboratory to develop statistical models for predicting the fatigue behavior of austenitic stainless steels in air and water environments at prototypical temperatures and loading rates. Some recent testing has also been concerned with the effect of mean stress on the fatigue behavior of 304 stainless steel in air. The ultimate goal of all these efforts is to allow development of fatigue design curves and design procedures that will assure adequate margin to fatigue crack initiation under prototypical operating conditions. In this paper, a best-fit strain-life curve for 304 stainless steel in air that takes into account the effect of mean stress is developed using the Smith-Watson-Topper equivalent strain parameter. A model for predicting the effect of water environments on fatigue life in both low and high oxygen water environments for a range of temperatures and loading rates is also described. Additional effort is required to develop the most appropriate way to develop a fatigue design curve from the mean stress and water effects models.

Download or read book Corrosion Fatigue Behavior of Austenitic Ferritic Stainless Steels written by JA. Moskovitz and published by . This book was released on 1978 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The corrosion-fatigue behavior of austenitic-ferritic (duplex) stainless steels, which combine high strength, good fracture toughness, and excellent corrosion resistance, is described in detail. The physical metallurgy of this class of alloys is reviewed so that the microstructure of different cast and wrought alloys can be understood in terms of alloy content, heat treatment, and cooling rate. The corrosion and stress corrosion cracking behaviors of duplex stainless steels are discussed and related to their corrosion-fatigue resistance. The results of recent work investigating the effects of various microstructural variables on corrosion-fatigue crack initiation and crack propagation in acidic chloride solution are described. The main structural variables are: volume fraction of austenite and ferrite, microstructural orientation of the different phases, embrittling intermetallic precipitates, and grain boundary carbides. An attempt is made to describe the microstructural features which will give the best corrosion-fatigue resistance in austenitic-ferritic stainless steels.

Download or read book Metals Abstracts written by and published by . This book was released on 1997 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Understanding the Effects of Deformation on Corrosion Fatigue of Type 304 Austenitic Stainless Steels in High Temperature Water written by Hanxiao Wang and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Creep and Oxidation on the Isothermal and Thermomechanical Fatigue Behavior of an Austenitic Stainless Steel written by Hans-Jürgen Christ and published by . This book was released on 2011 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Austenitic stainless steels are often used for high-temperature applications under conditions where fatigue loading occurs in combination with varying temperatures, superimposed mean stresses or dwell times and environmental effects. In order to characterize and separate the various damage contributions on the deformation behavior and the damage evolution of AISI304L, isothermal and thermomechanical fatigue tests were carried out at temperatures ranging from room temperature to 800°C. The test results in combination with microstructural observations were used for an adaption and application of a simple multi-component model to predict the stress-strain response under thermomechanical fatigue conditions solely from isothermal data. A very reasonable predictive accuracy was obtained and the cyclic stress-strain calculation was directly incorporated in fatigue life assessment models. Two models, which were found to be suitable for isothermal fatigue conditions, are presented. These models were extended and applied to non-isothermal conditions. A comparison of the experimentally observed fatigue life data with the predicted values revealed that thermomechanical fatigue life can reasonably be assessed from isothermal test results, if environmental effects are correctly taken into account. Thermomechanical fatigue tests employing dwell periods indicate that the life prediction models developed are robust and conservative.

Download or read book Advances in Sustainable Manufacturing written by Günther Seliger and published by Springer Science & Business Media. This book was released on 2011-05-27 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Non-renewable materials can no longer be disposed once humankind's ever increasing needs cannot be fulfilled anymore due to limited resources. Reuse and recycling become inevitable requirements for product and process design. Renewable resources must not be consumed in quantities higher than can be regained. New technologies have to be developed and applied for a Sustainable Product Development and Life Cycle Engineering to fulfill the needs of humankind, protecting public health, welfare, and environment. The 8th Global Conference on Sustainable Manufacturing brings together some of the world’s leading experts to present a scientific conference in Abu Dhabi, one of the world’s fastest growing economies and a global leader in the development of sustainable technologies. The conference will focus on 7 areas: Value adding by sustainable manufacturing in the UAE Potentials of renewables Education for sustainability engineering Green supply chain and transportation Microelectronics and resource efficiency Technology driven startups Sustainable products and manufacturing processes