The impact of intended service temperature on the optimal composition of Laves and M23C6 precipitate strengthened ferritic creep resistant steels

Lu, Qi; Toda, Yoshiaki; Harada, Naomichi; Xu, Wei; Zwaag, Sybrand van der

doi:10.1016/j.commatsci.2015.05.016

Cited by 9 publications

(2 citation statements)

References 28 publications

(29 reference statements)

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“…The decomposition mechanism of the Cr-rich M 23 C 6 is probably strain-induced. Recent research mainly focused on the strain-induced precipitation of M 23 C 6 carbides in Nibased superalloys [20][21][22], but there is a lack of research on the strain-induced decomposition of M 23 C 6 carbides. When the alloy is in a state of plastic deformation, the initial carbides could be induced to decompose by the strain.…”

Section: Resultsmentioning

confidence: 99%

High-temperature mechanical properties of Inconel-625: Role of carbides and delta phase

Liu

Xiao

Qin

et al. 2017

Materials Science and Technology

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Based on the temperature sensitivity characteristics, high-temperature tensile tests were performed at different temperatures and after different solid solution treatments to investigate the effect of Cr-rich M23C6, Nb-rich MC and the delta phase on the mechanical properties of Inconel 625. The experimental results indicated that the Cr-rich M23C6 carbides and the Nb-rich MC carbides decomposed at 700°C, which could be the reason for resulting tensile strength anomaly that was observed in a narrow temperature range from 650 to 700°C during the tensile tests at different temperatures. For the samples subjected to a prior solid solution treatment, the size of the δ phase was found to increase with the solution treatment temperature, whereas the elongation at fracture decreased.

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Section: Resultsmentioning

confidence: 99%

High-temperature mechanical properties of Inconel-625: Role of carbides and delta phase

Liu

Xiao

Qin

et al. 2017

Materials Science and Technology

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“…Shibuya et al found that the precipitation strengthening by intermetallic compounds (Laves phase, χ‐phase, μ‐phase, and M 23 C 6 ) was considered to be the main strengthening mechanism for the 15%Cr steels during creep. Lu et al reported that M 23 C 6 precipitates could increase the initial strength of 15%Cr steel, while Laves phases generally precipitate slowly during service and have a more significant strengthening effect for creep strength at the late stage.…”

Section: Introductionmentioning

confidence: 99%

Effect of Laves phase on the toughness of P92 weld metals

Wang

Liu

et al. 2018

Fatigue Fract Eng Mat Struct

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In this investigation, Laves phase was found to gradually precipitate from the tempered martensitic matrix of the two P92 weld metals (WMs) during the aging treatment. The particle size of Laves phase in the two WMs was ranged from 0.18 to 0.24 μm and was larger than the M23C6 particle size (ranged from 0.09 to 0.13 μm). The dislocation density of the two WMs was stable during aging. The hardness of the two WMs was stable during aging treatment, as the loss of solid solution strengthening was continuously compensated by the precipitation strengthening of Laves phase. The impact toughness of the two WMs declined gradually as the extending of aging time. The crack initiation zone and shear lip zone of the fracture surface were ductile fracture mode which consumed more fracture energy during impacting. The generation of Laves phase narrowed the crack initiation zone and shear lip zone and contributed to the decline of ductile fracture area percentage of aged WMs. The smaller ductile fracture area percentage contributed to the toughness reduction of aged WMs.

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Creep rupture behavior and microstructural evolution of modified 9Cr–1Mo heat-resistant steel

Ren

Wang

Tang

et al. 2018

J. Iron Steel Res. Int.

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The impact of intended service temperature on the optimal composition of Laves and M23C6 precipitate strengthened ferritic creep resistant steels

Cited by 9 publications

References 28 publications

High-temperature mechanical properties of Inconel-625: Role of carbides and delta phase

High-temperature mechanical properties of Inconel-625: Role of carbides and delta phase

Effect of Laves phase on the toughness of P92 weld metals

Creep rupture behavior and microstructural evolution of modified 9Cr–1Mo heat-resistant steel

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