EBSD study of early fractured phenomena in a 350 grade Maraging steel elbows exposed to hydrofluoric acid

Masoumi, Mohammad; Abreu, Hamilton Ferreira Gomes de; Herculano, Luiz F.G.; Pardal, Juan Manuel; Tavares, Sérgio Souto Maior; Silva, Marcelo J. G.

doi:10.1016/j.engfailanal.2019.05.031

Cited by 31 publications

(6 citation statements)

References 34 publications

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“…These cracks and pits have similarities with the degradation found by Masoumi et al [18], Dai et al [25] and Pawel et al [26]. This degradation arises from the hydrogen reaction and inter-granular corrosion caused by the stress produced by the precipitation of intermetallic compounds in the grain boundaries and the preference of the HF to dissolve these regions, as mentioned in the literature [10,18,[24][25][26][27][28][29][30][31]. Linear EDS analysis was also performed on the surface of the steels.…”

Section: Corrosion Products Analysissupporting

confidence: 85%

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Microstructural characterization of grade 300 and grade 350 maraging steels and electrochemical study in hydrofluoric solution

Florez

Pereira

Cardoso

et al. 2021

Journal of Fluorine Chemistry

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Section: Corrosion Products Analysissupporting

confidence: 85%

“…This transformation occurs because of the high nickel content, the low carbon content and the shear phenomenon, and it is a structural modification that occurs with any cooling rate. The martensite formed is softer and more resistant than the tetragonal one (BCT) [14,17,18]. Fig.…”

Section: Characterization Of the Samplesmentioning

confidence: 97%

Microstructural characterization of grade 300 and grade 350 maraging steels and electrochemical study in hydrofluoric solution

Florez

Pereira

Cardoso

et al. 2021

Journal of Fluorine Chemistry

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“…This is caused by higher degree of deformation causing accumulation of dislocation and crystallographic effect (i.e., sub-grain, grain, and interphase boundaries). The previous work revealed that grains with high Taylor factor values and high Taylor factor mismatch between adjacent grains are more susceptible to intergranular and transgranular fracture, because these grains do not yield easily (Ref 41,42). This could be explained by dislocation pileup at intersection of crystallographic planes to generate an excessive internal energy to initiate crack and consequently premature fracture.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and Crystallographic Texture Changes under Torsion Loading of Pearlitic Steel Strips

Masoumi

Béreš

Herculano

et al. 2020

J. of Materi Eng and Perform

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Cold-drawn pearlitic steel strips exhibit a great combination of strength and ductility and are widely used in many engineering applications. Some of these applications require further mechanical conformation for the final use. An analysis of the microstructure and the change in crystallographic texture when strips are subjected to torsion processes necessary for some applications was made in the current study. It was shown that the formation of the wavy pearlite morphology associated with the <110> fiber texture parallel to the drawing axis could improve fatigue damage. Extreme dislocation densities and crystallographic defects induced by torsion enhanced the formation of ultrafine ferritic grains accompanied by partial cementite decomposition. The relationship between ferrite and cementite interfaces successfully simulated using the Shackleton model.

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“…Maraging alloys present a microstructure with ductile martensite (α') rich in nickel and with intermetallic compounds precipitated during the aging treatments -like Ni 3 (Ti,Mo) and Fe 2 (Ti,Mo), increasing strongly their mechanical resistance under service condition [1][2][3][4][5][6][7][8][9] . Their excellent mechanical properties make these materials useful to be used in different industrial sectors such as the aeronautic, military, among others 1,2 .…”

Section: Introductionmentioning

confidence: 99%

Production and Characterization of Oxides Formed on Grade 300 and 350 Maraging Steels Using two Oxygen/Steam Rich Atmospheres

et al. 2022

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The growing process of a spinel-like oxide film can be obtained through different atmospheres; in this sense Air, O 2 , steam, and nitrogen atmospheres were used in different steps during the aging heat treatment at 490ºC of maraging 300 and 350 alloys. The oxidation layer produced under different atmospheres was chemically, microstructurally and mechanically characterized by means of advanced techniques. The results showed (in both alloys) a non-homogeneous mix oxide formed by magnetite, nickel and cobalt ferrites and MoO 3 heterogeneously distributed along the oxide thickness. It was also founded TiO 2 in the innermost areas and a particularly important quantify of hematite on the external surface. A nickel-rich austenite phase was produced at the interphase due to the combination of nickel stability and the preference of cobalt, molybdenum, and iron diffuses through the film as ions. The highest thickness values were found in the oxides produced in maraging 300 steels which could indicate greater susceptibility to oxidation comparing with grade 350 maraging steel. The oxide films produced in both maraging alloys using air atmosphere presents excellent adherence, and the results show the capability for being used for tribological applications under sliding contact tests.

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EBSD study of early fractured phenomena in a 350 grade Maraging steel elbows exposed to hydrofluoric acid

Cited by 31 publications

References 34 publications

Microstructural characterization of grade 300 and grade 350 maraging steels and electrochemical study in hydrofluoric solution

Microstructural characterization of grade 300 and grade 350 maraging steels and electrochemical study in hydrofluoric solution

Microstructure and Crystallographic Texture Changes under Torsion Loading of Pearlitic Steel Strips

Production and Characterization of Oxides Formed on Grade 300 and 350 Maraging Steels Using two Oxygen/Steam Rich Atmospheres

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