Effect of quenching and tempering process on sulfide stress cracking susceptibility in API-5CT-C110 casing steel

Liu, M.; Wang, C. H.; Dai, Yumei; Li, X.; Cao, Guanghui; Russell, Alan M.; Liu, Y.H.; Dong, Xiaoming; Zhang, Z.H.

doi:10.1016/j.msea.2017.01.067

Cited by 48 publications

(15 citation statements)

References 52 publications

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“…Consequently, the packet can be regarded as the effective unit when evaluating the deformation capability. For local misorientation distribution, Zhang et al [11] suggested that the lath/block/packet boundaries showed higher local misorientation values than the matrix, while Liu et al [24] found high local misorientation values mainly located in the LABs or in the vicinity of LABs. In the current work, as marked by black arrows in Figure 7c,d,g,f, the high accumulation area with a high local misorientation was mainly situated in the LABs, indicating a higher local strain distribution in LABs.…”

Section: Discussionmentioning

confidence: 99%

“…The crystallographic features have been known to play an important role in the interaction of hydrogen with steels [6]. As an effective technique, EBSD is usually used to detect different boundaries and local strain distributions in the as-tempered martensite by measuring the misorientation angle between adjacent points in a grain [24]. In general, the grain boundaries are classified into two groups: low angle boundaries (LABs, 2 • ≤ θ < 15 • ) and high angle boundaries (HABs, θ ≥ 15 • ).…”

Section: Ebsd Characterizationmentioning

confidence: 99%

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Effects of the Primary NbC Elimination on the SSCC Resistance of a HSLA Steel for Oil Country Tubular Goods

et al. 2021

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Sulfide stress corrosion cracking (SSCC) has been of particular concern in high strength low alloyed (HSLA) steels used in the oil industry, and the non-metallic inclusions are usually considered as a detrimental factor to the SSCC resistance. In the present work, continuous casting (CC) and electroslag remelting (ESR) were adopted to fabricate a 125 ksi grade steel in order to evaluate the effect of microstructure with and without primary NbC carbides (inclusions) on the SSCC resistance in the steel. It was found that ESR could remove the primary NbC carbides, and hence, slightly increase the strength without deteriorating the SSCC resistance. The elimination of primary NbC carbides caused two opposite effects on the SSCC resistance in the studied steel. On the one hand, the elimination of primary NbC carbides increased the dislocation density and the proportion of high angle boundaries (HABs), which was not good to the SSCC resistance. On the other hand, the elimination of primary NbC carbides also induced more uniform nanosized secondary NbC carbides formed during tempering, providing many irreversible hydrogen traps. These two opposite effects on SSCC resistance due to the elimination of primary NbC carbides were assumed to be offset, and thus, the SSCC resistance was not greatly improved using ESR.

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Section: Discussionmentioning

confidence: 99%

Section: Ebsd Characterizationmentioning

confidence: 99%

Effects of the Primary NbC Elimination on the SSCC Resistance of a HSLA Steel for Oil Country Tubular Goods

et al. 2021

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“…The EBSD investigations were scanned with a step size of 50 nm at an operating voltage of 15 kV and a sample tilt angle of 70° to measure the crystallographic orientation, texture, and KAM values of ferrite in the SAE1078 steel during rolling. The KAM values represent the average numerical misorientation angles around an EBSD point calculated with a maximum misorientation angle of 5° [27,28]. The raw data were analyzed by TSL-OIM-Analysis software.…”

Section: Electron Backscatter Diffraction (Ebsd)mentioning

confidence: 99%

Effects of microstructure and crystallography on mechanical properties of cold-rolled SAE1078 pearlitic steel

Liu

Yang

Liu

et al. 2018

Materials Science and Engineering: A

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The evolution of the microstructure and crystallography in SAE1078 pearlitic steel sheets under different cold-rolling reductions of up to 90% were quantified using transmission electron microscopy (TEM), electron backscatter diffraction (EBSD), and X-ray diffraction (XRD). The mechanical properties were determined by tensile testing at room temperature. TEM analysis showed that the pearlite structure was obviously refined with the interlamellar spacing decreasing to about 57 nm at the rolling reduction of 90%. EBSD investigations indicated that the ferrite exhibited a {001}texture in the 90% cold-rolled pearlitic steel. The dislocations were mainly concentrated during cold rolling between the 10% and 70% reduction ratios as the average kernel average misorientation (KAM) angle increased from 0.75° to 1.20°. XRD examination revealed that a transformation from bcc to bct crystal structure of ferrite occurred at 90% rolling reduction due to the supersaturation of carbon. Significant augmentation in the ultimate tensile strength during cold rolling results from the boundary, dislocation, and solid solution strengthening mechanisms.

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“…The precipitated phases and the ratio of the high-angle grain boundaries (HAGBs) influence the sulfur resistance of C110 steel. The increase in volume fraction of the nano-scale precipitated phase and HAGBs may enhance the SSC resistance [ 10 , 11 ]. The martensite structure that forms during high-temperature tempering treatment is composed mainly of body-centered cubic ferrite matrix with carbide particles, which favors the steel’s SSC resistance [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Titanium and Boron Microalloying on Sulfide Stress Cracking in C110 Casing Steel

Zhang

Liu

2020

Materials

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The effect of Ti and B microalloying on the hardenability, prior austenite grain size (PAGS), mechanical properties, and sulfide stress cracking (SSC) of C110 grade steel was studied by Jominy testing, static tensile testing, an optical microscope (OM), scanning electron microscopy (SEM) and double cantilever beam (DCB) testing. The results show that the addition of 0.015% Ti and 0.002% B into a medium-carbon Fe-Cr-Mo-Nb-V steel increased the hardenability and refined the PAGS and quenched martensite packets, and the size of carbides was reduced. It is believed that these behaviors are responsible for the improvement in the threshold stress intensity factor KISSC.

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Effect of quenching and tempering process on sulfide stress cracking susceptibility in API-5CT-C110 casing steel

Cited by 48 publications

References 52 publications

Effects of the Primary NbC Elimination on the SSCC Resistance of a HSLA Steel for Oil Country Tubular Goods

Effects of the Primary NbC Elimination on the SSCC Resistance of a HSLA Steel for Oil Country Tubular Goods

Effects of microstructure and crystallography on mechanical properties of cold-rolled SAE1078 pearlitic steel

Effect of Titanium and Boron Microalloying on Sulfide Stress Cracking in C110 Casing Steel

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