Cavitation erosion resistance of high interstitial CrMnCN austenitic stainless steels

Niederhofer, Philipp; Huth, S.

doi:10.1016/j.wear.2012.12.050

Cited by 40 publications

(25 citation statements)

References 36 publications

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“…The cavitation resistance of a material is frequently characterized by the incubation period and maximum erosion rate 7,[9][10][11][12][13] . Another less subjective parameter used to measure the initial period of cavitation and required in technical reports by ASTM G32-10, is the nominal incubation time (determined by the interception between the cavitation time axis and the extension of the maximum erosion rate line fitting, B in Figure 1a and 1b).…”

Section: Introductionmentioning

confidence: 99%

Effect of Cold Work on Cavitation Resistance of an Austenitic Stainless Steel Coating

2016

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Machining procedures of welding deposits are usual and result on cold work hardened surfaces. The cold work effect on cavitation erosion of an austenitic stainless steel surface is assessed. FeCrMnSiB coatings were processed by PTA on AISI 304 plates. Specimens were grouped as the cold work deformed surface (CWHS) and the undeformed polished surface (UPS) specimens. Top surface and transverse section of coatings were analysed for slip lines and hardness changes by light microscopy and Vickers microhardness measurements. Ultrasonic cavitation tests were conducted in accordance to ASTM G32-10. CWHS specimens exhibited slip lines and hardened surfaces while UPS specimens did not show traces of slip lines and had insignificant changes on microhardness. Cold work prior to cavitation indirectly increased the nominal incubation time and reduced the maximum erosion rate. Cold work increases the duration of the acceleration period postponing the onset of the maximum erosion rate and enhancing cavitation resistance.

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Section: Introductionmentioning

confidence: 99%

Effect of Cold Work on Cavitation Resistance of an Austenitic Stainless Steel Coating

2016

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“…These result in an prolonged incubation period and high cavitation erosion resistance of Cr-Co-NiMn austenitic stainless steel. The surface hardness of CrMnCN austenitic stainless steel increased with C and N concentrations, so was the cavitation erosion resistance (Niederhofer and Huth 2013). The crystal structure and grain size are also important influential factors for cavitation erosion resistance (Bregliozzi et al 2005).…”

Section: Microstructure and Chemical Compositionmentioning

confidence: 99%

Cavitation Erosion of Metallic Materials

Chen

Zhao

Zhao³

et al. 2018

IJGE

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Cavitation erosion normally occurs in a fluid dynamic system, which can cause failure of metal parts. It is a complicated process involving the interaction of electrochemical corrosion and mechanical wear. In this paper, various research methods for cavitation erosion behavior are reviewed. The present techniques of cavitation erosion degree measurement and different period determination include mass loss, volume loss, pit number, pit depth and surface roughness. 2D and 3D microstructure characterization observations are applied to discuss the evolution process and micro-zone damage. Hardness, residual stress and ratio of hardness to elastic modulus are good indicators for the degradation of surface mechanical properties. Electrochemical examinations are integrated to investigate the effect of cavitation on passive film and cavitation erosion mechanism. Furthermore, the influencing factors (mechanical properties, material chemical composition and microstructure) and the cavitation erosion characteristics of several metals (i.e. carbon steel, copper, stainless steel and titanium alloy) are introduced and summarized. Normally, the addition of Mn, Co, Cr, C and N can increase the cavitation erosion resistance. High hardness, high yield/tensile and toughness strength, good work-hardening property, fine grains are advantageous to the resistance to cavitation erosion. The cavitation erosion preferentially occurs on the lower intensity phase, which absorbs cavitation impact energy and mitigates the damage degree of a high strength phase. The interface between phases and grain boundary are also the weak spots to be attacked in the initiation and propagation of cavitation erosion. For passive metals, stainless steel and titanium alloy, the passive film is in a metastable state of depssivation/repassivation under cavitation. In a strongly corrosive medium, the synergetic effect of cavitation and corrosion promotes the thinning and semiconducting property change of the passive film.

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“…In some high interstitial CrMnCN AusSSs, twins and slip lines extending through to the grain boundaries were induced by the CE process 18 . Damage was observed to get initiated at grain boundaries, but not at the twins and slip Materials Research lines.…”

Section: Influence Of ε and α'On Ce Pit Initiation And Damage Morphologymentioning

confidence: 99%

The Influences of Martensitic Transformations on Cavitation-Erosion Damage Initiation and Pitting Resistance of a Lean Austenitic Stainless Steel

Wang

Kwok

et al. 2016

Mat. Res.

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This paper looks into the influences of martensitic transformations on the cavitation-erosion (CE) damage initiation mechanism and pitting corrosion resistance of a lean austenitic stainless steel. The ε and α' martensites are prime sites of CE damage initiation for this steel, whereas grain boundaries are more favourable damage initiation sites for other similar steels. The profusion of ε and α' results in fast surface roughening during the CE process, which may cause a compromise in performance when this steel (or similar steels that have the same CE damage mechanism) is used for such applications as hydro-machinery or piping. ε and α' also detrimentally affect the pitting resistance of this steel and so they are expected to affect CE resistance adversely due to the synergism between CE and corrosion.

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Cavitation erosion resistance of high interstitial CrMnCN austenitic stainless steels

Cited by 40 publications

References 36 publications

Effect of Cold Work on Cavitation Resistance of an Austenitic Stainless Steel Coating

Effect of Cold Work on Cavitation Resistance of an Austenitic Stainless Steel Coating

Cavitation Erosion of Metallic Materials

The Influences of Martensitic Transformations on Cavitation-Erosion Damage Initiation and Pitting Resistance of a Lean Austenitic Stainless Steel

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