Strain and temperature contributions to structural evolution in a Re-containing 10% Cr-3% Co-3% W steel during creep

Published on May 5, 2021in Materials at High Temperatures1.389
· DOI :10.1080/09603409.2021.1924548
Alexandra Fedoseeva10
Estimated H-index: 10
,
I. Nikitin5
Estimated H-index: 5
+ 1 AuthorsR. Kaibyshev
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Abstract The coarsening of Laves phase in a Re-containing 10% Cr-3% Co-3% W steel during both creep and ageing at 923 K was investigated. The depletion of W solutes from the ferrite matrix is accompanied with the precipitation of Laves phase, wherein creep strain accelerates both these processes. The equilibrium W content in the ferritic matrix of 1.24 wt% and the volume fraction of Laves phase of 1.6% is reached after 500 h of creep and 1000 h of ageing. This is related to lower activation ener...
1 CitationsSource
#1Alexandra FedoseevaH-Index: 10
#2Ivan NikitinH-Index: 2
Last. Rustam KaibyshevH-Index: 58
view all 6 authors...
3 CitationsSource
#1Alexandra FedoseevaH-Index: 10
#2I. NikitinH-Index: 5
Last. Rustam KaibyshevH-Index: 58
view all 4 authors...
Abstract The nucleation of the Laves phase particles in a Re-containing 10% wt. Cr-3% Co-3% W steel with a low nitrogen and a high boron contents during creep is characterized by distinctive features. The precipitation process can be written as M23C6 carbide → M6C carbide → Laves phase. The nucleation of all phases in this precipitation sequence is heterogeneous. The M23C6 carbides precipitate on the boundaries of martensitic structure during tempering at temperature of 770 °C. The M6C (Fe3W3C) ...
5 CitationsSource
The kinetics of the growth of M23C6 carbide particles in 9% Cr martensitic steel with a high boron content is studied under conditions of long-term aging and creep. It is shown that the grain-boundary diffusion is a mechanism that controls the coarsening of these carbides during the aging. Deformation accelerates the coarsening of particles during creep, which can be explained by additional diffusion along dislocation lines.
2 CitationsSource
#1Alexandra FedoseevaH-Index: 10
#2I. NikitinH-Index: 5
Last. Rustam KaibyshevH-Index: 58
view all 4 authors...
Abstract Re-containing 10Cr-3Co-3W martensitic steel with low nitrogen and high boron contents exhibited a rupture time of 10,987 h at 650°C/140 MPa. This superior creep resistance was caused by partially saved tempered martensite lath structure due to precipitation of M23C6 carbides and Laves phase chains on lath boundaries as well as their high resistance to coarsening. M23C6 carbides were characterized by decreased interfacial energy that resulted in the retention of the orientation relations...
5 CitationsSource
#1Nadezhda Dudova (Belgorod State University)H-Index: 13
#2R. Mishnev (Belgorod State University)H-Index: 10
Last. Rustam Kaibyshev (Belgorod State University)H-Index: 58
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Abstract The purpose of this study is to identify the relationships between the creep behavior of the 10% Cr martensitic steel with 0.008% B and 0.003% N and changes in microstructure and precipitations of secondary phases. Creep tests were carried out at 650 °C under an applied stress ranging from 180 to 120 MPa. The 10% Cr steel exhibits a linear stress vs. time to rupture dependence without creep strength breakdown up to approximately 40 000 h. The 100 000 h creep rupture strength at 650 °C i...
16 CitationsSource
#1Alexandra FedoseevaH-Index: 10
#2I. NikitinH-Index: 5
Last. Rustam KaibyshevH-Index: 58
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Abstract 9–12%Cr martensitic steels are perspective materials for critical components of new high-efficiency power plants working at ultra-supercritical parameters of steam. Addition of 0.2% rhenium in the experimental steel improved the short-term creep strength at 650 °C. Comparison of kinetics of tungsten depletion from the matrix in different high-Cr martensitic steels showed that rhenium in the experimental 10Cr-3Co-3W-0.2Re steel did not lead to retaining an increased amount of solute W in...
8 CitationsSource
Abstract The size and distribution of Cr(V,Nb)N (Z-phase) particles in a 9Cr-3Co-2W-0.6Mo-0.1Ni-0.2V-0.06Nb-0.1C-0.05N-0.005B steel subjected to creep rupture test during 11,151 h at 650 °C under an applied stress of 100 MPa were studied. The replacement of V-rich (V,Nb)(C,N) carbonitrides by Z-phase was accelerated by plastic flow as suggested by a comparative analysis of these particles in different portions of crept specimen, namely, the grip section, the portion of uniform elongation, and th...
9 CitationsSource
#1Alexandra FedoseevaH-Index: 10
#2Nadezhda DudovaH-Index: 13
Last. Andrey BelyakovH-Index: 41
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The effect of increasing tungsten content from 2 to 3 wt % on the creep rupture strength of a 3 wt % Co-modified P92-type steel was studied. Creep tests were carried out at a temperature of 650 °C under applied stresses ranging from 100 to 220 MPa with a step of 20 MPa. It was found that an increase in W content from 2 to 3 wt % resulted in a +15% and +14% increase in the creep rupture strength in the short-term region (up to 103 h) and long-term one (up to 104 h), respectively. On the other han...
17 CitationsSource
#1Alexandra FedoseevaH-Index: 10
#2Ivan NikitinH-Index: 2
Last. Rustam KaibyshevH-Index: 58
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2 CitationsSource
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