Study of the carbon distribution in multi-phase steels using the NanoSIMS 50

Valle, Nathalie; Drillet, J.; Bouaziz, Olivier; Migeon, H.-N.

doi:10.1016/j.apsusc.2006.02.283

Cited by 20 publications

(15 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The composition of the marked area ( Figure 5A) is dominated by ions of MgO. The abundance of carbon can be explained by a high sensitivity of the SIMS technique for the analysis of the carbon (Valle et al, 2006). Also, Figure 5A shows quartz crystals of 1 -2 μm in the chalk (marked by the stippled red line; left image).…”

Section: Chalk Characteristics After the Experimentsmentioning

confidence: 99%

Evaluation of the compositional changes during flooding of reactive fluids using scanning electron microscopy, nano-secondary ion mass spectrometry, x-ray diffraction and whole rock geochemistry

Zimmermann¹,

Madland²,

Nermoen³

et al. 2015

Bulletin

View full text Add to dashboard Cite

Outcrop chalk of late Campanian age (Gulpen Formation) from Liège (Belgium) was flooded with MgCl 2 in a triaxial cell for 516 days under reservoir conditions to understand how the nonequilibrium nature of the fluids altered the chalks. The study is motivated by enhanced oil recovery (EOR) processes because dissolution and precipitation change the way in which oils are trapped in chalk reservoirs. Relative to initial composition, the first centimeter of the flooded chalk sample shows an increase in MgO by approximately 100, from a weight percent of 0.33% to 33.03% and a corresponding depletion of CaO by more than 70% from 52.22 to 14.43 wt.%. Except for Sr, other major or trace elements do not show a significant change in concentration. Magnesite was identified as the major newly grown mineral phase. At the same time, porosity was reduced by approximately 20%. The amount of Cl − in the effluent brine remained unchanged, whereas Mg 2+ was depleted and Ca 2+ enriched. The loss of Ca 2+ and gain in Mg 2+ are attributed to precipitation of new minerals and leaching the tested core by approximately 20%, respectively. Dramatic mineralogical and geochemical changes are observed with scanning electron microscopy-energy-dispersive x-ray spectroscopy, nano secondary ion mass spectrometry, x-ray diffraction, and whole-rock geochemistry techniques. The understanding of how fluids interact with rocks is important to, for example, EOR, because textural changes in the pore space affect how water will imbibe and expel oil from the rock. The mechanisms of dissolution and mineralization of fine-grained chalk can be described and quantified and, when understood, offer numerous possibilities in the engineering of carbonate reservoirs.

show abstract

Section: Chalk Characteristics After the Experimentsmentioning

confidence: 99%

Evaluation of the compositional changes during flooding of reactive fluids using scanning electron microscopy, nano-secondary ion mass spectrometry, x-ray diffraction and whole rock geochemistry

Zimmermann¹,

Madland²,

Nermoen³

et al. 2015

Bulletin

View full text Add to dashboard Cite

show abstract

“…The chamber pressure was 3 × 10 -10 Torr and samples were pre-sputtered to eliminate carbon surface contamination. Note that although the SIMS intensity varies linearly with carbon concentration, 23) the data presented here are not quantitative because any reference sample corresponding to the studied grade was used for calibration. Nevertheless, on each carbon map, the variations of C intensity can be interpreted as relative variations in the local C concentration.…”

Section: Methodsmentioning

confidence: 99%

“…and a limiting spatial resolution of 50 nm. 23) High spatial resolution SIMS carbon maps were acquired on samples quenched from 755°C, 790°C and 810°C. The incident Cs + probe energy was 16 keV with a primary ion beam current of 1 pA and a probe size between 50 nm and 150 nm.…”

Section: Methodsmentioning

confidence: 99%

Distribution of Carbon in Martensite During Quenching and Tempering of Dual Phase Steels and Consequences for Damage Properties

et al. 2013

View full text Add to dashboard Cite

The microstructural evolution of martensite in as-quenched and quenched and tempered Fe-0.15C-0.215Si-1.9Mn-0.195Cr wt.% dual phase (DP) steels processed to give four different ferrite/martensite ratios was studied. It was found that partial thermodynamic equilibrium was obtained after intercritical annealing for 130 s. The local carbon distribution in as-quenched martensite was heterogeneous for all quenching temperatures. Significant carbon enrichment was observed at the ferrite/martensite interface at annealing temperatures of 790°C, whereas carbon depletion occurred when the annealing temperature was reduced to 755°C. A possible explanation for the carbon profile in terms of the effect of Mn partitioning on the austenite phase transformation kinetics is given. The kinetics of carbide formation during tempering is strongly influenced by these carbon gradients. A simple analysis shows that the interface carbon depletion observed at lower intercritical annealing temperatures could induce a beneficial increase in the void nucleation strain εn, due to a reduction in the backstress at the ferrite/martensite interface which decreases the local stress triaxiality. We estimate that the upper limit for the improvement in the asquenched microstructure is ~8%, so the effect could provide a moderate delay in the onset of damage. Further, we propose that the improvement in damage resistance during tempering is mainly due to dispersed void formation at tempered carbides and that this mechanism will be compromised if those carbides are localised at ferrite/martensite interfaces. This argument mitigates for the carbon-depleted interface structure obtained at lower intercritical temperatures.

show abstract

“…The local carbon distribution or concentration cannot be obtained by XRD measurements. Alternatively, some researchers have used transmission electron microscopy (TEM) (Kammouni et al, ; Scott & Drillet, ; Zhang & Kelly, ), atom probe tomography (APT) (Garcia‐Mateo, Caballero, Miller, & Jimenez, ; Peet, Babu, Miller, & Bhadeshia, ), or Nano‐SIMS (Valle, Drillet, Bouaziz, & Migeon, ) to detect the different carbon levels in austenite.…”

Section: Introductionmentioning

confidence: 99%

The application of convergent beam electron diffraction (CBED) analysis on transformation‐induced plasticity (TRIP) steels

Tsai

et al. 2018

Microscopy Res & Technique

View full text Add to dashboard Cite

Convergent beam electron diffraction (CBED) in transmission electron microscopy (TEM) was applied to determine local carbon concentrations in low-carbon transformation-induced plasticity (TRIP) steels. High-order Laue-zone (HOLZ) lines were experimentally obtained for comparison with simulation results. A new procedure for calculating carbon content is thus proposed. Retained austenite (RA) is classified into three types by morphology; the relationship between the carbon content and the corresponding RA morphology is discussed based on CBED results. Furthermore, results of X-Ray diffractometry measurements are also used for comparison.

show abstract

Study of the carbon distribution in multi-phase steels using the NanoSIMS 50

Cited by 20 publications

References 2 publications

Evaluation of the compositional changes during flooding of reactive fluids using scanning electron microscopy, nano-secondary ion mass spectrometry, x-ray diffraction and whole rock geochemistry

Evaluation of the compositional changes during flooding of reactive fluids using scanning electron microscopy, nano-secondary ion mass spectrometry, x-ray diffraction and whole rock geochemistry

Distribution of Carbon in Martensite During Quenching and Tempering of Dual Phase Steels and Consequences for Damage Properties

The application of convergent beam electron diffraction (CBED) analysis on transformation‐induced plasticity (TRIP) steels

Contact Info

Product

Resources

About