Precipitation behavior of Laves phase in 10%Cr steel X12CrMoWVNbN10-1-1 during short-term creep exposure

Cui, Huiran; Sun, Feng; Chen, Ke; Zhang, Lanting; Wan, Rongchun; Shan, Aidang; Wu, Jiansheng

doi:10.1016/j.msea.2010.08.013

Cited by 86 publications

(28 citation statements)

References 17 publications

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“…The trend mentioned above shows intensive precipitation/diffusion processes that in all likelihood occur within this time interval and are related, but not limited, to the occurrence of Laves phase. Literature data [14,27] show that Laves phase may occur in the microstructure of tungsten-modified 9%Cr steels as early as after 200 h ageing at 650…”

Section: Microstructure and Properties Of P92 Steel After Long-term Tmentioning

confidence: 99%

Assessment of microstructure stability and mechanical properties of X10CrWMoVNb9-2 (P92) steel after long-term thermal ageing for high-temperature applications

Zieliński¹,

Golański²,

Sroka³

2016

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This paper presents changes in mechanical properties and microstructure of the material of components of a power station boiler made of X10CrWMoVNb9-2 (P92) steel after long--term thermal ageing. Mechanical properties and microstructure were examined on material in initial heat treatment condition and after long-term thermal ageing up to 100,000 h at 600 and 650• C. The microstructure was observed using a scanning and transmission electron microscope. The examinations of steel microstructure and mechanical properties in initial heat treatment condition have confirmed that the requirements for this steel are met. Longterm thermal ageing at a temperature similar to the operating one as well as mechanical properties and microstructure examinations allowed to assess the effect of long-term impact of temperature on the properties and microstructure of P92 steel. The presented method can be used for evaluation and qualification of microstructural changes in power station boiler components operating under creep conditions. K e y w o r d s : P92 steel, microstructure, mechanical properties, long-term thermal ageing

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Section: Microstructure and Properties Of P92 Steel After Long-term Tmentioning

confidence: 99%

Assessment of microstructure stability and mechanical properties of X10CrWMoVNb9-2 (P92) steel after long-term thermal ageing for high-temperature applications

Zieliński¹,

Golański²,

Sroka³

2016

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“…Research has shown that MX carbo-nitrides present a very slow coarsening rate when the creep 650°C 29]. So, the reason why increasing the working temperature reduces the creep and mechanical properties is particularly due to the evolution tendency of M 23 C 6 and formation of new phases such as Laves or Z-phase [30][31][32][33][34]. As type IV cracking mainly formed at FGHAZ of the new 10% Cr MHRS welded joints, the focus of the following study was on the evolution of M 23 C 6 and the newly formed phases in FGHAZ.…”

Section: The Behavior Of Type IV Crackingmentioning

confidence: 99%

Microstructure of 10% Cr martensitic heat-resistant steel welded joints and type IV cracking behavior during creep rupture at 650°C

Zhang

Zhao

et al. 2015

Materials Science and Engineering: A

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“…The main factor responsible for the loss in strength is microstructural degradation. Degradation of creep properties of P92 steel is generally associated with ripening of M 23 C 6 carbides, recovery of tempered martensitic lath structure and precipitation of new phases such as Laves phases {(Fe, Cr) 2 (Mo, W)} [8][9][10]. Ennis et al [11] found that M 23 C 6 particles have higher coarsening rates, while MX particles coarsen negligibly on increasing tempering temperature from 715 to 775°C.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution During Short Term Creep of 9Cr–0.5Mo–1.8W Steel

Maddi

Barbadikar

Sahare

et al. 2015

Trans Indian Inst Met

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P92 steel (9Cr-0.5Mo-1.8W) was subjected to a heat treatment of 1050°C/30 min/air cooling/780°C/ 120 min/air cooling followed by 1080°C/30 min/air cooling/740°C/60 min/air cooling to obtain tempered martensite microstructure, for better creep strength. Stress rupture tests carried at 600°C in the range of 250-350 MPa resulted in rupture times in the range of 200-3000 h. Straight line plot of stress rupture curve indicated no major change in deformation mechanism. Coarsening of precipitates and substructure development were the main reasons for microstructure degradation, consequently leading to reduced hardness of the sample. Gauge and grip portions of the same sample were sectioned to comparatively evaluate the effects of stress and aging. Gauge portion of 3000 h sample showed considerable change in the microstructure in terms of boundary migration, while that of grip portion hardly evolved. The ruptured samples exhibited predominantly ductile fracture with elongated cavities at higher rupture times.

show abstract

Precipitation behavior of Laves phase in 10%Cr steel X12CrMoWVNbN10-1-1 during short-term creep exposure

Cited by 86 publications

References 17 publications

Assessment of microstructure stability and mechanical properties of X10CrWMoVNb9-2 (P92) steel after long-term thermal ageing for high-temperature applications

Assessment of microstructure stability and mechanical properties of X10CrWMoVNb9-2 (P92) steel after long-term thermal ageing for high-temperature applications

Microstructure of 10% Cr martensitic heat-resistant steel welded joints and type IV cracking behavior during creep rupture at 650°C

Microstructure Evolution During Short Term Creep of 9Cr–0.5Mo–1.8W Steel

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