Effects of gettering sulfur as CrS or MnS on void generation behavior in ultra-high strength steel

Iorio, L.E.; Garrison, Warren M.

doi:10.1016/s1359-6462(02)00067-2

Cited by 23 publications

(17 citation statements)

References 6 publications

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“…Only a third of the Cr containing precipitations was indicated as Cr 2 S 3 . This is in contrast to Iorio and Garrison [8] who found merely CrS next to MnS Table 2. Particle size of the steel powders after sieving.…”

Section: Resultscontrasting

confidence: 72%

Influence of the Sulfur Content on the Sintering Behavior and the Mechanical Properties of a CrMnNi‐TWIP‐Steel

Decker

Lange

Krüger

et al. 2014

steel research int.

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The aim of the present study is the investigation of the influence of the sulfur content within the range of 0.02-0.1 wt% and the combined decrease of the particle size on the mechanical properties of a highly alloyed TWIP-steel (TWinning Induced Plasticity; 16% Cr, 7% Mn, 9% Ni). Samples were processed by spark plasma sintering (SPS) and tested by quasi-static compressive deformation (10 À3 s À1). An increase of the surface-active sulfur in TWIP-steel is decreasing the surface tension (s) of the liquid steel phase at a constant spraying parameter. The surface tension as a thermo-physical property has a major impact on the particle size distribution of a metal powder in atomization. With a decrease in s, the mass median particle size (d 50 ) in steel powder is shifted to finer particles. Through the increased sulfur content, the compressive yield strength increases slightly about 40 MPa. A sulfur content of 0.05 wt% within the steel turned out to be optimal for the compressive properties by causing a high strength and work hardening through a fine grained microstructure, while the sulfur precipitations showed no pronounced negative influence. The mechanical properties were not negatively affected due to the increase of the sulfur content within the samples.

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Section: Resultscontrasting

confidence: 72%

Influence of the Sulfur Content on the Sintering Behavior and the Mechanical Properties of a CrMnNi‐TWIP‐Steel

Decker

Lange

Krüger

et al. 2014

steel research int.

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“…40) And with the overall effect of hydrogen stabilized vacancy damage, vacancy aggregation and NVC mechanism, 10) diffusive hydrogen would quickly segregate near the MnS/α-Fe interfaces upon straining. And the surrounding martensites formed lattice defects assisted by the diffusible hydrogen released from the MnS inclusions and cracks propagated until fracture.…”

Section: Discussionmentioning

confidence: 99%

Hydrogen Traps and Hydrogen Induced Cracking in 20CrMo Steel

Zhu

Yao

et al. 2017

ISIJ Int.

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The hydrogen trapping sites of commercial 20CrMo steel samples with electrochemically charged hydrogen were characterized by thermoelectric power (TEP) and scanning Kelvin probe force microscope (SKPFM). A surface potential drop of about 190 mV was found for the globular MnS inclusion and 150 mV for the elongated one due to the hydrogen absorption of MnS inclusions. Similar to thermal desorption measurement, TEP is a potential method in analyzing hydrogen traps of solid solution, dislocations and irreversible traps. The fracture morphology and hydrogen induced cracking can be explained by combined hydrogen embrittlement mechanisms. Although hydrogen induced cracks are found to initiate at the elongated inclusions, only longitudinal cracks were observed in this study which is not detrimental to the embrittlement.

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“…[17] From a mechanical viewpoint, inclusions enriched in chromium nucleate void at lower strain levels than MnS inclusions. [18,19] On the other hand, the enrichment in chromium and the formation of a mixed compound (Cr,Mn) 2 (O,S) 3 at the surface of inclusions during heating at 1000°C cause an improvement of the corrosion resistance of these sites by preventing the dissolution of heterogeneities in the passive range. It has been shown that no pitting occurs at inclusions containing about 20 at.…”

Section: Introductionmentioning

confidence: 99%

Dissolution of chromium-enriched inclusions and pitting corrosion of resulfurized stainless steels

Krawiec

Vignal

Heintz

et al. 2006

Metall Mater Trans A

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The dissolution of MnS inclusions enriched in chromium (30 to 40 wt pct Cr) and the corrosion susceptibility of resulfurized stainless steel were studied in various NaCl-and NaClO 4 -based solutions by X-ray photoelectron spectroscopy, secondary ion mass spectroscopy, scanning electron microscopy (SEM), and the electrochemical microcell technique. It has been shown that chromiumenriched inclusions do not undergo dissolution under free corrosion conditions. By contrast, electrochemical dissolution of inclusions occurs at high potential values (above 500 mV vs saturated calomel electrode) in all the solutions, followed by stable pitting. It has also been shown that some areas containing chromium-enriched inclusions exhibited stable pitting at low potentials (below 100 mV vs saturated calomel electrode) in the electrolytes with chloride ions. Field-emission SEM experiments have revealed that the matrix undergoes dissolution around these inclusions. An assumption is proposed for describing pitting corrosion mechanisms.

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Effects of gettering sulfur as CrS or MnS on void generation behavior in ultra-high strength steel

Cited by 23 publications

References 6 publications

Influence of the Sulfur Content on the Sintering Behavior and the Mechanical Properties of a CrMnNi‐TWIP‐Steel

Influence of the Sulfur Content on the Sintering Behavior and the Mechanical Properties of a CrMnNi‐TWIP‐Steel

Hydrogen Traps and Hydrogen Induced Cracking in 20CrMo Steel

Dissolution of chromium-enriched inclusions and pitting corrosion of resulfurized stainless steels

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