Mapping of Diffusion and Nanohardness Properties of Fcc Co-Al-V Alloys Using Ternary Diffusion Couples

Wang, C.; Xu, Guanglong; Cui, Yujie

doi:10.1007/s11661-017-4170-2

Cited by 7 publications

(6 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is apparent that the binary interdiffusion coefficients Table 6 Activation energy Q (kJ mol -1 ) and pre-exponential factor D 0 (9 10 -6 m 2 s -1 ) of the interdiffusion coefficients of BCC Ti-Mn binary alloys Table 4 for 1273 K and Table 5 for 1473 K. The uncertainty of interdiffusivities was computed by using the standard deviation from multiple measurements of composition profiles. [19,25] All the main interdiffusion coefficients (D Ti AlAl andD Ti MnMn ) show positive values and being larger than the cross ones. While some cross terms of D Ti AlMn andD Ti MnAl show negative values, they all are well satisfied with the thermodynamic constraints [28] viã…”

Section: (B) (A)mentioning

confidence: 99%

See 1 more Smart Citation

Experimental Diffusion Research on BCC Ti-Mn Binary and Ti-Al‐Mn Ternary Alloys

Huang

Tan

Guo

et al. 2018

J. Phase Equilib. Diffus.

Self Cite

View full text Add to dashboard Cite

Interdiffusion in the BCC phase of the Ti-Mn binary and Ti-Al-Mn ternary systems was investigated between 1273 and 1473 K by applying the diffusion-couple technique. The local chemical compositions within the interdiffusion zone of the diffusion couples were acquired by electron probe microanalysis (EPMA). The raw composition profiles were then analytically represented by the error function expansion, which allow the ternary inter-and impurity diffusivities to be appropriately extracted by the Whittle-Green and generalized Hall methods, respectively. It was demonstrated that, all four diffusion coefficientsD k ij

show abstract

Section: (B) (A)mentioning

confidence: 99%

“…x R Àx L is introduced, where x L and x R represent the compositions at the far left and far right ends, respectively. [21,25] The expression of binary interdiffusion coefficient yields Eq 2,…”

Section: (B) (A)mentioning

confidence: 99%

Experimental Diffusion Research on BCC Ti-Mn Binary and Ti-Al‐Mn Ternary Alloys

Huang

Tan

Guo

et al. 2018

J. Phase Equilib. Diffus.

Self Cite

View full text Add to dashboard Cite

show abstract

“…where x L and x R represent the compositions at the left and right ends, respectively. [22] For the Ti-Al-Zr ternary system, Fick's second law can be expressed with the W-G method as:…”

Section: Extraction Of Diffusion Coefficientsmentioning

confidence: 99%

“…The interdiffusion coefficients extracted at the intersection compositions of the diffusion paths are summarized in Table 2 for 1273 K (1000°C) and Table 4 for 1473 K (1200°C). [22,25] Note that the standard deviations were determined from the independent calculations upon five ERFEX representation treatments with the EPMA data. The reliability of the obtained diffusion coefficients was ZrAl validated by checking if the thermodynamic constraints derived by Kirkaldy [26] are satisfied, i.e.…”

Section: Diffusion Coefficientsmentioning

confidence: 99%

Diffusion Research in BCC Ti-Al-Zr Ternary Alloys

Fan

et al. 2019

J. Phase Equilib. Diffus.

Self Cite

View full text Add to dashboard Cite

Diffusion behavior in the BCC Ti-Al-Zr ternary alloys was experimentally investigated at 1273 K (1000°C) and 1473 K (1200°C) by means of the diffusion-couple technique. Upon the Whittle-Green and generalized Hall methods, the inter-and impurity diffusion coefficients were respectively extracted from the composition profiles acquired by the electron microprobe analysis (EPMA) and subsequently represented by the error function expansion. The extracted main interdiffusion coeffi-cientD Ti AlAl increases with increasing the content of either Al or Zr, and the increase is appearing more considerably at the higher temperature. However,D Ti ZrZr was noticed to decrease with the increase of Al and Zr contents at 1273 K (1000°C) while there is an upward trend at 1473 K (1200°C). The impurity diffusion coefficients of Al in Ti-Zr binary alloys, D Ã Al TiÀZr ð Þ , and of Zr in Ti-Al binary alloys, D Ã Zr TiÀAl ð Þ , increase with increasing the Zr and Al contents respectively. A comparison of average main interdiffusion coefficientD Ti XX made among ten Ti-Al-X ternary systems suggests that the Zr diffusion is most comparable to Cr and could operate via a vacancy-controlled mechanism. Keywords generalized Hall method Á impurity diffusion Á interdiffusion Á Ti-Al-Zr BCC ternary alloys Á Whittle-Green method Ã ZrðTiÀAlÞ

show abstract

“…The composition-distance profiles that were determined from couple M2 is shown in Figure 2 b. It is worth mentioning that, to avoid the errors from fitting or smoothing, a robust error function expansion (ERFEX) was put forward to represent the experimental profiles in an accurate analytical form [ 37 , 44 ]:

where X ( r ) is the effective alloying element content at location z ; a , b , c , and d are the fitting parameters.…”

Section: Resultsmentioning

confidence: 99%

Diffusivities and Atomic Mobilities in bcc Ti-Mo-Zr Alloys

Bai

Tan

et al. 2018

Materials

Self Cite

View full text Add to dashboard Cite

β-type (with bcc structure) titanium alloys have been widely used as artificial implants in the medical field due to their favorable properties. Among them, Ti-Mo alloy attracted numerous interests as metallic biomaterials. Understanding of kinetic characteristics of Ti alloys is critical to understand and manipulate the phase transformation and microstructure evolution during homogenization and precipitation. In this work, diffusion couple technique was employed to investigate the diffusion behaviors in bcc Ti-Mo-Zr alloys. The diffusion couples were prepared and annealed at 1373 K for 72 h and 1473 K for 48 h, respectively. The composition-distance profiles were obtained via electron probe micro-analysis (EPMA). The chemical diffusion coefficients and impurity diffusion coefficients were extracted via the Whittle-Green method and Hall method. The obtained diffusion coefficients were assessed to develop a self-consistent atomic mobility database of bcc phase in Ti-Mo-Zr system. The calculated diffusion coefficients were compared with the experimental results. They showed good agreement. Simulations were implemented by Dictra Module in Thermo-Calc software. The predicted composition-distance profiles, inter-diffusion flux, and diffusion paths are consistent with experimental data, confirming the accuracy of the database.

show abstract

Mapping of Diffusion and Nanohardness Properties of Fcc Co-Al-V Alloys Using Ternary Diffusion Couples

Cited by 7 publications

References 46 publications

Experimental Diffusion Research on BCC Ti-Mn Binary and Ti-Al‐Mn Ternary Alloys

Experimental Diffusion Research on BCC Ti-Mn Binary and Ti-Al‐Mn Ternary Alloys

Diffusion Research in BCC Ti-Al-Zr Ternary Alloys

Diffusivities and Atomic Mobilities in bcc Ti-Mo-Zr Alloys

Contact Info

Product

Resources

About