Atomistic study on the site preference and thermodynamic properties for CrFeC

Liu, Juewen; Chen, N.X.; Teng, Lidong; Seetharaman, S.

doi:10.1016/j.actamat.2005.07.039

Cited by 60 publications

(25 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Carbides show higher modulus than d precipitate in all the alloy 625 samples. The indentation modulus values of d precipitate and M 23 C 6 carbides are found to be in good agreement with those reported in literature based on the first-principle calculations [20][21][22][23][24]. Figure 8a and b show the AFM topography and corresponding first CRF maps obtained on CM 247A alloy with different phases (c, c 0 and carbides) present in it.…”

Section: Elasticity Mappingsupporting

confidence: 89%

“…The properties of various types of carbides analyzed by both experimental techniques and first-principle calculations are well documented by Pierson [22]. Xie et al [23] provided a simple and promising method for studying the properties of Cr 23 C 6 carbides which possess complex structures. It was observed that by replacing two or three Cr atoms with Fe/Mo atoms, the modulus could significantly be increased from 250 to 330 GPa.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Elasticity mapping of precipitates in nickel-base superalloys using atomic force acoustic microscopy

2016

View full text Add to dashboard Cite

The paper reports mapping of elastic properties of various precipitates such as c 0 , d, and carbides in nickel-base superalloys. Atomic force acoustic microscopy is used to measure the elastic properties with a lateral resolution of better than 100 nm in polycrystalline alloy 625 and directionally solidified alloy CM247A. A novel approach of simultaneous acquisition of two contact resonances and using the isotropic indentation modulus of matrix in every scan line as reference is used to circumvent the effect of change in tip condition while mapping elastic properties. Scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy is performed to identify the precipitates and their compositions. Carbides exhibited highest modulus followed by d precipitates, c 0 and c matrix, respectively. It is demonstrated that due to the close-packed orientation relationships of precipitates with the matrix, the modulus of a precipitate measured by the methodology described in this study is not affected by the orientation of individual grain in which the measurement is made.

show abstract

Section: Elasticity Mappingsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Elasticity mapping of precipitates in nickel-base superalloys using atomic force acoustic microscopy

2016

View full text Add to dashboard Cite

show abstract

“…The existence and stability of a pure c-Fe 23 C 6 phase are not clear. The only theoretical papers are by Xie and colleagues [15][16][17], who performed atomistic simulations for several compounds of c-M 23 C 6 , with M = Cr, Mn, Fe, W, etc. In the present paper we report results of first-principles calculations for c-Fe 23 C 6 , as well as for h-Fe 3 C for comparison.…”

Section: Introductionmentioning

confidence: 99%

Stability, structure and electronic properties of γ-Fe23C6 from first-principles theory

et al. 2010

View full text Add to dashboard Cite

“…These pair potentials have been calculated based on the lattice inversion method [19] and ab-initio cohesive energies at 0 K and used to study the properties of the carbides in the present group. [20,21] In Figure 12, the order of interaction intensity, I Cr-N >I Mn-N >I Cr-C >I Mn-C >I Fe-C (I donates the intensity of interatomic interaction), could be established, which indicates that both carbon and nitrogen affinities for Cr, Mn, and Fe atoms decrease with the increase in atomic number.…”

Section: Effect Of Nitrogen On the Activity Of Chromiummentioning

confidence: 94%

Study of Chromium Activity in the Cr-Fe-N System by Galvanic Cell Method

Liu

Teng

Chen

et al. 2009

Metall Mater Trans A

View full text Add to dashboard Cite

In the present work, the Cr-Fe-N alloys with different compositions were synthesized by nitriding the Cr-Fe powder mixtures in the purified nitrogen gas (101,325 Pa) at 1473 K for 2 weeks. The phase relationships in the synthesized alloys and the alloys equilibrated at 1173 K were carried out by X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The nitrogen content in the alloys equilibrated in the nitrogen gas (101,325 Pa) at 1173 K was analyzed using the inert-gas fusion thermal conductivity (IGFTC) method. The thermodynamic activities of Cr in Fe-Cr-N alloys were measured in the temperature range 973 to 1123 K using the solid-state galvanic cell technique with CaF 2 single crystal as the solid electrolyte. Based on the measured EMF values, the chromium activities in the alloys were calculated with respect to pure Cr with bcc structure as the standard state. The effect of nitrogen on Cr activities in the Cr-Fe-N system was examined by comparing the experimental results of the Cr activities in the Cr-Fe and Cr-Fe-C systems.

show abstract

Atomistic study on the site preference and thermodynamic properties for CrFeC

Cited by 60 publications

References 17 publications

Elasticity mapping of precipitates in nickel-base superalloys using atomic force acoustic microscopy

Elasticity mapping of precipitates in nickel-base superalloys using atomic force acoustic microscopy

Stability, structure and electronic properties of γ-Fe23C6 from first-principles theory

Study of Chromium Activity in the Cr-Fe-N System by Galvanic Cell Method

Contact Info

Product

Resources

About