Fatigue and creep–fatigue deformation of an ultra-fine precipitate strengthened advanced austenitic alloy

Carroll, Mark; Carroll, Laura

doi:10.1016/j.msea.2012.07.082

Cited by 21 publications

(12 citation statements)

References 33 publications

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“…The permanent increase in stress levels with the number of cycles in fatigue of Sanicro 25 differs from the cyclic response observed for standard austenitic stainless steels. In these solid-solutionhardened alloys, a so called "plateau" cyclic stress level behavior occurs and is connected with the development of dislocation cell structure as observed in conventional 304 and 316 steels at 650°C [23,32,33]. As a consequence of thermally enhanced cross-slip and climb, increased dislocationdislocation interactions lead to localized reordering and formation of tangles and later dislocation walls.…”

Section: Discussionmentioning

confidence: 95%

“…As described by kinematical theory, in case of semi-coherent or incoherent misfitting precipitates, a waveform in the lattice spacing could potentially generate both positive-and negativedisplacement satellite reflections in the diffraction pattern with an offset based upon the planar periodicity [23,22,24]. The FFTs (see Fig.…”

Section: Shown Inmentioning

confidence: 99%

“…Based on the conclusion that these are in fact Moiré fringes, the lattice plane misfit can be measured by use of the following equation [23,25,26] for the period of modulation, λm:…”

Section: Shown Inmentioning

confidence: 99%

“…where a is the lattice parameter, G is the distance of the (h k l) spot from the (0 0 0 Several authors [21,23,28] describe NbC nanoparticles as coherent or semi-coherent.…”

Section: Shown Inmentioning

confidence: 99%

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On the origin of extraordinary cyclic strengthening of the austenitic stainless steel Sanicro 25 during fatigue at 700 °C

et al. 2017

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The origin of the extraordinary strengthening of the highly-alloyed austenitic stainless steel Sanicro 25 during cyclic loading at 700°C was investigated by use of advanced scanning transmission electron microscopy (STEM). Along with substantial change of dislocation structure, nucleation of two distinct populations of nanoparticles was revealed. Fully coherent Cu-rich nanoparticles were observed homogeneously dispersed with high density along with nanometer-sized incoherent NbC carbides precipitating on dislocations during cyclic loading. Probe-corrected HAADF STEM imaging was used to characterize the atomic structure of nanoparticles. Compositional analysis was conducted using both EELS and high spatial resolution EDS. High temperature exposure induced precipitation of a high density of coherent Cu-rich nanoparticles while strain-induced nucleation of incoherent NbC nanoparticles leads to retardation of dislocation movement. The pinning effects https://ntrs.nasa.gov/search.jsp?R=20190000303 2019-02-10T17:10:39+00:00Z and associated obstacles to dislocation motion prevent recovery and formation of the localized lowenergy cellular structures. As a consequence, the alloy exhibits remarkable cyclic hardening at elevated temperature.

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Section: Discussionmentioning

confidence: 95%

Section: Shown Inmentioning

confidence: 99%

“…Based on the conclusion that these are in fact Moiré fringes, the lattice plane misfit can be measured by use of the following equation [23,25,26] for the period of modulation, λm:…”

Section: Shown Inmentioning

confidence: 99%

“…where a is the lattice parameter, G is the distance of the (h k l) spot from the (0 0 0 Several authors [21,23,28] describe NbC nanoparticles as coherent or semi-coherent.…”

Section: Shown Inmentioning

confidence: 99%

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On the origin of extraordinary cyclic strengthening of the austenitic stainless steel Sanicro 25 during fatigue at 700 °C

et al. 2017

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“…The environment can make the materials degrade severely. 4,5 Therefore, it is important to study the corrosion resistance of SA508-4 steel in high pressurized water condition. It is known that there are various electrochemical methods to study the corrosion phenomena, including electrochemical impedance spectroscopy (EIS), 69 electrochemical noise (EN), 1012 polarization curve 13,14 and so on.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Corrosion Resistance of SA508-4 Low Carbon Alloy Steel

et al. 2013

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The mechanical properties and corrosion resistance of SA508-4Ni-Cr-Mo low carbon alloy steel are elucidated using tensile testing, Charpy impact testing, fracture surface analysis and in-situ electrochemical noise (EN) technique. The metallographic structures are characterized by metallographic microscope combining with transmission electron microscope (TEM), and the fracture morphology is characterized by scanning electron microscope (SEM). The intercritical heat treatment (IHT) is introduced to heat the SA508-4 steel. The experimental observations reveal that the metallographic structure of SA508-4 steel is fine and uniform after different heat treatment, with martensite and lower bainite structures. The strength and toughness of SA508-4Ni-Cr-Mo are confirmed higher than that of SA508-3Mn-Ni-Mo steel used for reactor pressure vessels (RPV) at present. The IHT decreases the yield strength and toughness. EN results show that the noise resistance of SA508-4 steel decreased with the elevated temperature from 27 to 250°C, illustrating the passivity degradation of SA508-4 induced by the elevated temperature.

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Effect of Mixed-Grain Structure on Low-Cycle Fatigue Behavior of Fe-22Cr-25Ni Austenitic Steel at Elevated Temperature

Gao

Zhou

Shen

et al. 2023

J. of Materi Eng and Perform

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Fatigue and creep–fatigue deformation of an ultra-fine precipitate strengthened advanced austenitic alloy

Cited by 21 publications

References 33 publications

On the origin of extraordinary cyclic strengthening of the austenitic stainless steel Sanicro 25 during fatigue at 700 °C

On the origin of extraordinary cyclic strengthening of the austenitic stainless steel Sanicro 25 during fatigue at 700 °C

Mechanical Properties and Corrosion Resistance of SA508-4 Low Carbon Alloy Steel

Effect of Mixed-Grain Structure on Low-Cycle Fatigue Behavior of Fe-22Cr-25Ni Austenitic Steel at Elevated Temperature

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