Effect of post-weld heat treatment on the microstructure and hydrogen permeation of 13CrNiMo steels

Gesnouin, C.; Hazarabedian, A.; Bruzzoni, P.; Ovejero-Garcı́a, J.; Bilmes, Pablo David; Llorente, C.

doi:10.1016/j.corsci.2003.10.006

Cited by 72 publications

(24 citation statements)

References 16 publications

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“…Then, it is indeed strongly suggested that retained austenite does not play an important role as hydrogen trap in 9Cr steels. A similar result has been found for a 13Cr steel by Gesnouin et al [26] 2. The newly formed, coherent or semi-coherent carbides, and carbonitrides of alloy elements Cr 2 X, VX, and NbX play the main role as hydrogen traps…”

Section: B Relationship Between Microstructure and Hydrogen Trappingsupporting

confidence: 86%

Evolution of Minor Phases in a 9PctCr Steel: Effect of Tempering Temperature and Relation with Hydrogen Trapping

Hurtado-Noreña

Danón

Luppo

et al. 2015

Metall Mater Trans A

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The evolution of minor phases in ASTM A335 P91 steel has been studied on specimens submitted to different thermal treatments including a tempering step. Particular emphasis has been put on the tempering temperature range 573 K to 873 K (300°C to 600°C), which has not been yet intensively studied. The techniques used in this investigation were X-ray diffraction with synchrotron light, scanning electron microscopy with field emission gun and transmission electron microscopy. In the low tempering temperature range [573 K to 673 K (300°C to 400°C)], retained austenite, Fe 3 C and MX precipitates are observed. In the high tempering temperature range [773 K to 1053 K (500°C to 780°C)], M 23 C 6 -type carbides, MX-type carbonitrides and M 2 X precipitates are observed. The effect of the microstructure on hydrogen trapping is analyzed. The distorted matrix around the M 2 X and MX particles provides the most important trap sites in the P91 steel.

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Section: B Relationship Between Microstructure and Hydrogen Trappingsupporting

confidence: 86%

Evolution of Minor Phases in a 9PctCr Steel: Effect of Tempering Temperature and Relation with Hydrogen Trapping

Hurtado-Noreña

Danón

Luppo

et al. 2015

Metall Mater Trans A

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“…Gesnouin et al 7 and Bilmes et al 8 studied the effect of PWHT on corrosion, microstructure and mechanical properties of welds of 13CrNiMo. In these works a higher amount of austenite was produced by double tempering (670 °C/2h + 600 °C/2 or 8h).…”

Section: Introductionmentioning

confidence: 99%

Effects of post weld heat treatments on the microstructure and mechanical properties of dissimilar weld of supermartensític stainless steel

et al. 2014

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“…[4,6,12,13,[15][16][17][18][19] This is to obtain an almost fully martensitic microstructure after cooling to ambient temperature by avoiding formation of delta-ferrite, which can have detrimental effects on the properties. It was observed for different SMSS grades that the prior austenite grain size, together with the width of the martensite laths, was increasing with increasing austenitization temperature, [20][21][22] whereas the hardness was decreasing.…”

Section: Introductionmentioning

confidence: 99%

Austenite Formation from Martensite in a 13Cr6Ni2Mo Supermartensitic Stainless Steel

Bojack

Zhao

Morris

et al. 2016

Metall Mater Trans A

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The influence of austenitization treatment of a 13Cr6Ni2Mo supermartensitic stainless steel (X2CrNiMoV13-5-2) on austenite formation during reheating and on the fraction of austenite retained after tempering treatment is measured and analyzed. The results show the formation of austenite in two stages. This is probably due to inhomogeneous distribution of the austenite-stabilizing elements Ni and Mn, resulting from their slow diffusion from martensite into austenite and carbide and nitride dissolution during the second, higher temperature, stage. A better homogenization of the material causes an increase in the transformation temperatures for the martensite-to-austenite transformation and a lower retained austenite fraction with less variability after tempering. Furthermore, the martensite-to-austenite transformation was found to be incomplete at the target temperature of 1223 K (950°C), which is influenced by the previous austenitization treatment and the heating rate. The activation energy for martensite-to-austenite transformation was determined by a modified Kissinger equation to be approximately 400 and 500 kJ/mol for the first and the second stages of transformation, respectively. Both values are much higher than the activation energy found during isothermal treatment in a previous study and are believed to be effective activation energies comprising the activation energies of both mechanisms involved, i.e., nucleation and growth.

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Effect of post-weld heat treatment on the microstructure and hydrogen permeation of 13CrNiMo steels

Cited by 72 publications

References 16 publications

Evolution of Minor Phases in a 9PctCr Steel: Effect of Tempering Temperature and Relation with Hydrogen Trapping

Evolution of Minor Phases in a 9PctCr Steel: Effect of Tempering Temperature and Relation with Hydrogen Trapping

Effects of post weld heat treatments on the microstructure and mechanical properties of dissimilar weld of supermartensític stainless steel

Austenite Formation from Martensite in a 13Cr6Ni2Mo Supermartensitic Stainless Steel

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