The strength of tantalum columbium alloy single crystals

Peters, B. C.; Hendrickson, A. A.

doi:10.1016/0001-6160(66)90200-8

Cited by 9 publications

(5 citation statements)

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“…For verifying the extrapolating ability of developed polynomials, the polynomial is used for predicting the strength of RHEAs in Table 3. A single-phase bcc solid solution microstructure in the as-cast condition is reported for all of alloys in Table 3 [35][36][37][38][39]. Because strength values in Table 3 were obtained via tensile or microhardness tests, inconsistencies may be expected between the predictions and experimental results.…”

Section: Resultsmentioning

confidence: 99%

“…First the strength of binary solid solution refractory alloys can be considered. Figure 2 shows the critical resolved shear stress (τ CRSS ) of Nb-Ta alloy single crystals at room temperature (RT) [38]. It can be seen that the strength of Nb-Ta bcc solid solution alloys can be modeled by a polynomial where the polynomial equation (Eq.…”

Section: Proposed Methodologymentioning

confidence: 99%

“…Figure 2 shows the critical resolved shear stress (τ CRSS ) of Nb-Ta alloy single crystals at room temperature [38]. It can be seen that the strength of Nb-Ta bcc solid solution alloys can be modeled by a polynomial where the polynomial equation can be written as following 0.8787 0.0062 0.0042 where and show the atomic concentrations of niobium and tantalum in atomic percent.…”

Section: Proposed Methodologymentioning

confidence: 99%

“…Table 1 containing Ti-and Nb-rich alloys Fig. 2 Experimental data for τ CRSS of Nb-Ta alloy single crystals at room temperature [38]. The proposed polynomial for modeling the strength can be seen in Eq.…”

Section: Alloy Designmentioning

confidence: 99%

“…The composition domain which is covered by alloys in Table 1 is schematically shown in Figure 1. In addition to the experimental data in Table 1, following estimations [27,38] are also used for the yield strength of bcc elements and binary systems: σ Mo = 450 MPa [27], σ Nb = 250 MPa [27], σ Ta = 350 [27], σ V =300 MPa [27], σ NbTa =320 MPa [27,38], σ MoTa = 1200 MPa [27,39], and σ VNb = 800 MPa [40].…”

Section: Experimental Datamentioning

confidence: 99%

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New approach to model the yield strength of body-centered cubic solid solution refractory high-entropy alloys

Shafiei

2020

Tungsten

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A data fitting approach is used in the present work for modeling the yield strength of single-phase body-centered cubic (bcc) refractory high-entropy alloys (RHEAs) in the Al-Hf-Nb-Mo-Ta-Ti-V-Zr system. It is suggested that a polynomial equation could be used for modeling the strength of solid solution alloys where an experimental dataset containing more than 80 data is used for fitting and obtaining optimized polynomial coefficients. The comparison results show that the predictions are in good agreement with experimental data indicating that the proposed polynomial could be used for modeling the strength of RHEAs. To show how the developed polynomial can be applied in designing of RHEAs, the alloy system Hf-Mo-Nb-Ta-Ti-V-Zr is selected as an example and the strength of designed RHEAs within this system is investigated by the developed polynomial. The results show that the strength of alloys within this system increases by increasing the amount of Mo and Zr, while the strength of alloys decreases by increasing the amount of Ti. Moreover, the results indicate that the strength of alloys increases with increasing the values of parameters atomic size difference (ASD) and valence electron concentration (VEC). The developed polynomial can be considered as a straightforward method for assessing the strength of solid solution RHEAs, although it does not explain the mechanisms involved in the strengthening of alloys.

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