Cyclic Deformation Behavior of Fe-18Cr-18Mn-0.63N Nickel-Free High-Nitrogen Austenitic Stainless Steel

Shao, Chenwei; Shi, Feng; Li, X. W.

doi:10.1007/s11661-015-2769-8

Cited by 31 publications

(6 citation statements)

References 44 publications

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“…Generally, HNASS has a low stacking fault energy and a high austenitic stability [47,48], and cold deformation almost cannot induce a martensitic transformation in HNASS [31,35], so that the microstructure evolution as well as deformation behavior and micro-mechanism in HNASS are different from that in the conventional ASS [48,49]. Correspondingly, the velocity, mode and driving force of grain boundary migration are also different during subsequent annealing.…”

Section: Discussionmentioning

confidence: 99%

Improving intergranular corrosion resistance in a nickel-free and manganese-bearing high-nitrogen austenitic stainless steel through grain boundary character distribution optimization

et al. 2016

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Section: Discussionmentioning

confidence: 99%

Improving intergranular corrosion resistance in a nickel-free and manganese-bearing high-nitrogen austenitic stainless steel through grain boundary character distribution optimization

et al. 2016

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“…Hence, we consider the mechanical heterogeneity associated with large local strain gradients across fatigue shear bands to be responsible for the damage failure that leads to a deviation in Fig. 5 from the classical Coffin−Manson rule, i.e., a single linear relationship in the double-logarithmic plot of plastic strain amplitude

versus cycle number to failure N f ( 28 ).…”

Section: Simulationsmentioning

confidence: 99%

Unraveling submicron-scale mechanical heterogeneity by three-dimensional X-ray microdiffraction

Xie

Wang

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

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SignificanceShear bands critically control the strength and ductility in a wide range of structural, geological, and biological materials. The nondestructive three-dimensional structural probing of individual shear bands has hitherto not been possible for investigation at the critical mesoscopic length scales. The X-ray microdiffraction study reported in this work reveals the highly localized stress gradients and microscopic damage mechanisms across the fatigue shear bands. The resulting local strain gradients lead to severe stress concentrations at the submicrometer scale, causing an anomalous deviation of the classical Coffin−Manson rule for the high-cycle fatigue failure of metals. This work opens an avenue for harnessing the synchrotron-based, 3D spatially resolved X-ray for studying the heterogeneous deformation and fracture in bulk materials.

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“…Samples aged at 700 o C, 800 o C and 900 o C showed gradually increasing planar arrangement of dislocations, both close to GBs as well as within the austenite matrix. It has been reported that plannar arrangement of dislocation occurs by a combination of planar glide and twinning [7][8][9] . In NFHNSS sample aged at 700 o C, a reduction in Cr and N content increase the stacking fault energy of austenite matrix compared to solution annealed sample.…”

Section: { } Experimental True Stress At Low Strain Regionmentioning

confidence: 99%

“…Several authors have proposed flow equations to establish the relationship between flow stress and true plastic strain [7][8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

Effect of Aging Temperature on Plastic Flow Behaviour and Toughness of Nickel Free High Nitrogen Austenitic Stainless Steels

2023

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In the present study, tensile properties, plastic flow behaviour and impact toughness of Nickel free High Nitrogen Austenitic Stainless Steels (NFHNSS) were evaluated under solution annealed and aged condition (at 700 o C, 800 o C and 900 o C for 14 hours). Plastic flow behaviour was analyzed using Holloman and Ludwigson flow equations. Samples in solution annealed and aged conditions exhibited a flow transition behaviour. Ludwigson flow equation produces best fit for flow transition behaviour. Transmission Electron Microscope (TEM) investigations of NFHNSS samples after tensile test revealed dislocation network and planar arrangement of dislocations adjancent to Grain Boundaries (GB) in the solution annealing and aged conditions respectively. Plastic deformation of NFHNSS occurs by a combination of planar glide and twinning. Impact energy was significantly higher in solution annealed condition than aged condition. Impact energy values decreased with increasing aging temperature. Precipitation and growth as well as morphology of Cr 2 N at the GBs reduce the impact energy values significantly. Presence of larger precipitates readily pull out from GB easily than smaller precipitates at low temperatures. Large precipitate, at the GB's readily pull out at low temperature, compared to slower ones.

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Cyclic Deformation Behavior of Fe-18Cr-18Mn-0.63N Nickel-Free High-Nitrogen Austenitic Stainless Steel

Cited by 31 publications

References 44 publications

Improving intergranular corrosion resistance in a nickel-free and manganese-bearing high-nitrogen austenitic stainless steel through grain boundary character distribution optimization

Improving intergranular corrosion resistance in a nickel-free and manganese-bearing high-nitrogen austenitic stainless steel through grain boundary character distribution optimization

Unraveling submicron-scale mechanical heterogeneity by three-dimensional X-ray microdiffraction

Effect of Aging Temperature on Plastic Flow Behaviour and Toughness of Nickel Free High Nitrogen Austenitic Stainless Steels

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