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Showing 1 to 13 of 13 for “"Austenitic steel"”.
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Precipitation reactions in a Cr-Mn-N austenitic steel with niobium and vanadium additions
Includes bibliographical references.
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Effect of titanium pick-up on mould flux viscosity in continuous casting of titanium-stabilised stainless steel
… casting of two Ti-stabilised stainless steels was investigated in terms of the level of titanium pick-up by the flux and the effect of this absorption of titanium on the viscosity of the fluxes. The two fluxes considered are respectively used for the casting of a ferritic steel (type …
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Energetics and Deformation Response of Random Grain Boundaries in FCC Nickel
… modeled after an experimental sample of austenitic steel. The structure and energies of these random boundaries under stress and temperature was analyzed. Heterogeneous displacement maps were made for a side-by-side comparison of the dislocation activity and interactions with the grain …
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Hydrogen in Austenite: What Changes after Martensitic Transformation?
Diffusible hydrogen in steels can cause embrittlement. Hydrogen has much lower diffusivity in austenite than in ferrite. Therefore, austenite is relatively immune to embrittlement. However, the poor stability of austenite can lead to martensitic transformation. And martensite cannot dissolve all …
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Caracterização por ensaios magnéticos não destrutivos de aços HP provenientes de fornos de reforma
… different aging stages to which are submitted HP austenitic steel tubes when operating in oil industry's reformer furnaces. The assumption adopted here is that aging causes microstructural transformations that modify their magnetic properties. The eddy currents technique and a permanent magnetic …
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Computer modelling of plastic deformation and fracture in heterogeneous systems.
… of plastic deformation and fracture in austenitic steel are presented. A lattice model representing the continuum mechanical behaviour in three-dimensions is developed. The model is shown to recover the governing equations for continuum elasticity theory and is extended to include …
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The Effect of Local Conditions on Deformation Processes in Low Stacking -Fault Energy FCC Alloys
… examined in samples of a nitrogen-strengthened austenitic steel alloy deformed at room temperature under quasi-static and high strain rate compression. Post-mortem analysis of the deformed microstructures at different levels of applied strain reveals the nucleation of deformation twins is …
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High temperature cracking of nickel chromium austenitic steels.
… of AISI 304 (an l8Cr 1ONi non-hardenable austenitic steel in which the grain boundaries are free to migrate) was investigated. A linear relationship between applied cracking stress and the reciprocal of the square root of the grain size was found. This is consistent with the cracking …
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Radiation-induced microstructural and mechanical property modifications in advanced alloys
… advanced alloys, including Fe–20Cr–25Ni–Nb austenitic steel Alloy 709, Fe–9Cr ferritic/martensitic steel T91, and Fe–14Cr ferritic ODS steel MA957, were investigated using a combination of microstructure characterizations and nanoindentation measurements. Several different types of …
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Time-frequency domain modelling for ultrasonic nondestructive testing
… for the characterisation of defects embedded in steel welds through the analysis of data collected by ultrasonic phased array inspections. A factor common to the existing imaging techniques used for flaw characterisation is the subjective thresholding required to estimate the size of the flaw. …
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The development of abrasive-corrosive wear resistance of steels by microstructural control
The performance of developmental alloyed steels with improved abrasive-corrosive wear resistant properties has been evaluated. The synergistic effect of abrasion and corrosion in the accelerated wear of steels is examined and the main parameters identified. A model of the process is proposed. The …
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Impact of grain boundary character on the radiation-induced segregation morphology in proton-irradiated 316L austenitic stainless steel
… RIS. As a result, grain boundary engineering of steels with high fractions of twin boundaries has been proposed as a way to prevent the formation of segregated GB networks. There are, however, publications that report non-negligible RIS at twin boundaries. This thesis explores experimentally the …
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Investigating the Effect of Austenite Grain Size and Grain Boundary Character on Deformation Twinning Behavior in A High-Manganese TWIP Steel: A TEM In-Situ Deformation Study
… The ultrafine-grained (UFG) high manganese austenitic twinning-induced plasticity (TWIP) steels have been found to overcome the strength-ductility trade-off but their underlying mechanism of discontinuous yielding behavior has not been well understood. In this study, our systematic TEM …