Thermodynamic assessment of the Mn–S and Fe–Mn–S systems

Dilner, David; Mao, Haiyang; Selleby, Malin

doi:10.1016/j.calphad.2014.11.004

Cited by 17 publications

(4 citation statements)

References 53 publications

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“…In high chromium steels it is possible to enrich the inclusions with this element. Considering also the small amount of iron, pyrrhotite with the formula (Cr, Fe, Mn)S can be formed [ 33 , 34 , 35 ]. Atomic concentration analysis indicates a 3:1 ratio between iron+manganese and chromium, and a 1:1 ratio between metallic elements and sulfur; thus, the observed inclusions were [(Fe,Mn) 3 Cr]S.…”

Section: Resultsmentioning

confidence: 99%

Laser Dissimilar Welding of AISI 430F and AISI 304 Stainless Steels

et al. 2020

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A dissimilar autogenous laser welded joint of AISI 430F (X12CrMoS17) martensitic stainless steel and AISI 304 (X5CrNi18-10) austenitic stainless steel was manufactured. The welded joint was examined by non-destructive visual testing and destructive testing by macro- and microscopic examination and hardness measurements. With reference to the ISO 13919-1 standard the welded joint was characterized by C level, due to the gas pores detected. Microscopic observations of AISI 430F steel revealed a mixture of ferrite and carbides with many type II sulfide inclusions. Detailed analysis showed that they were Cr-rich manganese sulfides. AISI 304 steel was characterized by the expected austenitic microstructure with banded δ-ferrite. Martensitic microstructure with fine, globular sulfide inclusions was observed in the weld metal. The hardness in the heat-affected zone was increased in the martensitic steel in relation to the base metal and decreased in the austenitic steel. The hardness range in the weld metal, caused by chemical inhomogeneity, was 184–416 HV0.3.

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Section: Resultsmentioning

confidence: 99%

Laser Dissimilar Welding of AISI 430F and AISI 304 Stainless Steels

et al. 2020

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“…The parameters are optimized via a weighted least-squares algorithm implemented by using ThermoCalc software. In this work, we adopted the latest Fe-S thermodynamic database generated by Dilner et al 43 in our calculations. The prediction of the phase fraction during fast cooling was obtained using the Scheil model, where the solid phases were assumed to be 'frozen', and thus the simulated solidification path was allowed to reach the eutectic path in the Fe-S binary.…”

Section: Methodsmentioning

confidence: 99%

Inherent predominance of high chiral angle metallic carbon nanotubes in continuous fibers grown from a molten catalyst

et al. 2016

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We present evidence that high temperature CVD growth of SWNTs under conditions of continuous spinning of macroscopic fibers leads to an inherent predominance of high chiral angle CNTs, peaking at the armchair end. Raman, UV-vis-NIR absorption, and photoluminescence spectroscopy measurements show the prevalence of metallic SWNTs. The complete chiral angle distribution is obtained by electron diffraction of over 390 CNTs. It is biased towards high chiral angles and peaks at the armchair end (30°), in good agreement with the established atomistic models for SWNT growth from a liquid catalyst. Based on the Fe-C-S constituent binary and ternary phase diagrams, thermodynamic calculations of phase compositions from fast cooling and experimental evidence of a post-synthesis catalyst, the proposed thermodynamic path of the catalyst is to form a solid FCC Fe core and a liquid Fe-S shell. S in the outer liquid shell first stabilizes the edge of the nascent CNT, but once a graphitic wall forms it is rejected due to the high interfacial energy of the Fe-C-S alloy.

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“…There are only two room-temperature Mn-S phases and no Mn-W phase [46,47]. The thermodynamic data of the Mn-S phases were obtained from [17,48]. The resulting ternary phase diagram is dominated by the Mn-S phases, as shown in Figure 3c.…”

Section: Manganesementioning

confidence: 99%

Condensed phase diagrams for the metal–W–S systems and their relevance for contacts to WS2

Zeng

Domask

Mohney

2016

Materials Science and Engineering: B

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Motivated by interest in contacts to the layered semiconductor WS 2 , this study investigates condensed phase equilibria in M-W-S systems (M = transition or post-transition metal) and relates the findings to earlier work on M-Mo-W systems. Thermodynamic data were collected or estimated for the binary phases bearing M, W, and/or S; and a literature search for existing ternary phases was performed.Condensed phase M-W-S isothermal phase diagrams were calculated where sufficient data was available.These phase diagrams reflected three general forms. The early transition metals and group 13 posttransition metals were mostly reactive with WS 2 , with the resulting diagrams being either metal sulfide dominant or ternary/solid solution dominant. The late transition metals were all WS 2 dominant, where the metal is in equilibrium with WS 2 . These findings are similar to those from our earlier study on the M-Mo-S phase diagrams and can be used to guide studies on contacts to WS 2 .

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Thermodynamic assessment of the Mn–S and Fe–Mn–S systems

Cited by 17 publications

References 53 publications

Laser Dissimilar Welding of AISI 430F and AISI 304 Stainless Steels

Laser Dissimilar Welding of AISI 430F and AISI 304 Stainless Steels

Inherent predominance of high chiral angle metallic carbon nanotubes in continuous fibers grown from a molten catalyst

Condensed phase diagrams for the metal–W–S systems and their relevance for contacts to WS2

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