Enhanced creep resistance of Ti30Al25Zr25Nb20 high-entropy alloy at room temperature

Wang, D.; Tan, Jun; Li, C.J.; Qin, Xin; Guo, Shuyu

doi:10.1016/j.jallcom.2021.161038

Cited by 33 publications

(20 citation statements)

References 47 publications

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“…This is mainly caused by the dynamical hysteresis diffusion effect of the HEA. 98 The variation of the diffraction peaks of the NaZn 13 in FeCoNiAlZn@CNT is similar to that in the Cu 2 NiZn@CNT (Fig. 2c).…”

Section: Resultssupporting

confidence: 63%

An anodeless, mechanically flexible and energy/power dense sodium battery prototype

Bai

Tang

Liu

et al. 2022

Energy Environ. Sci.

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Section: Resultssupporting

confidence: 63%

An anodeless, mechanically flexible and energy/power dense sodium battery prototype

Bai

Tang

Liu

et al. 2022

Energy Environ. Sci.

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“…50 H. Peng et al studied the nanoindentation creep of Ti-6Al-4 V and found the creep stress exponents to be 4.2 for 50 mN and 2.6 for 100 mN which were comparable to our results for Ti-5Al-2.5Sn. 47 51 The values of stress exponent are helpful in analyzing the dominant creep mechanism. Creep stress exponent of 1 denotes diffusion creep mechanism, whereas that of 2 shows the grain boundary sliding mechanism.…”

Section: Resultsmentioning

confidence: 99%

“…They found dislocation as the active mechanism of creep. 51 Q. Zhou et al measured creep stress exponent to be approximately 4, 2.8, 6.25, 8.3 for Ti 20 Ni 20 , Ti 20 H f20 , Ti 32.8 and Ti 45 respectively. 51…”

Section: Resultsmentioning

confidence: 99%

Indentation creep behavior of pulsed Tungsten inert gas welded Ti-5Al-2.5Sn alloy joints by nanoindentation and atomic force microscopy

Hassaan

Junaid

Shamir

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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Indentation creep was used to analyze the heterogeneity of the mechanical properties in base metal, heat affected zone and fusion zone of titanium alloy weldments obtained using TIG welding process which is generally employed in aerospace industries. For all the weld zones, creep deformation was analyzed using nanoindenter, AFM and microhardness testing. Nanoindentation creep depth was plotted with respect to time using data from the hold stage and CSRs were calculated using empirical relations. The analysis of creep stress exponents (CSE) was indicative of an active creep mechanism for all the weld zones however, a notable variation between the stress exponents and creep mechanism was observed among base metal, heat affected zone and fusion zone. Moreover, Vickers microindentation was used to measure creep of Ti-5Al-2.5Sn alloy weldment using Sargent-Ashby model. However, it did not give the realistic values creep behavior when compared to literature and nanoindentation measurements. It was observed that the phase change, grain size and the loading strain rate (LSR) significantly affected the creep behavior of the Ti-5Al-2.5Sn weldment.

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“…To evaluate the creep response of the system via nanoindentation, the mathematical frameworks referenced in studies [5,12,22,23] were utilized. These frameworks detail the calculations necessary for understanding the system's behavior under specific conditions.…”

Section: Creep Assessment Calculation Frameworkmentioning

confidence: 99%

The Advanced Assessment of Nanoindentation-Based Mechanical Properties of a Refractory MoTaNbWV High-Entropy Alloy: Metallurgical Considerations and Extensive Variable Correlation Analysis

Sokoli,

Kamnis,

Delibasis

et al. 2024

Applied Sciences

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In the present study, a thorough examination of nanoindentation-based mechanical properties of a refractory MoTaNbVW high-entropy alloy (RHEA) was conducted. Basic mechanical properties, such as the indentation modulus of elasticity, indentation hardness, and indentation-absorbed elastic energy, were assessed by means of different input testing variables, such as the loading speed and indentation depth. The obtained results were discussed in terms of the elasto-plastic behavior of the affected material by the indentation process and material volume. Detailed analysis of the RHEA alloy’s nanoindentation creep behavior was also assessed. The effect of testing parameters such as preset indentation depth, loading speed, and holding—at the creep stage—time were selected for their impact. The results were explained in terms of the availability of mobile dislocations to accommodate creep deformation. Crucial parameters, such as maximum shear stress developed during testing (τmax), critical volume for dislocation nucleation (Vcr), and creep deformation stress exponent n, were taken into consideration to explain the observed behavior. Additionally, in all cases of mechanical property examination and in order to identify those input testing parameters—in case—that have the most severe effect, an extensive statistical analysis was conducted using four different methods, namely ANOVA, correlation matrix analysis, Random Forest analysis, and Partial Dependence Plots. It was observed that in most of the cases, the statistical treatment of the obtained testing data was in agreement with the microstructural and metallurgical observations and postulates.

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Enhanced creep resistance of Ti30Al25Zr25Nb20 high-entropy alloy at room temperature

Cited by 33 publications

References 47 publications

An anodeless, mechanically flexible and energy/power dense sodium battery prototype

An anodeless, mechanically flexible and energy/power dense sodium battery prototype

Indentation creep behavior of pulsed Tungsten inert gas welded Ti-5Al-2.5Sn alloy joints by nanoindentation and atomic force microscopy

The Advanced Assessment of Nanoindentation-Based Mechanical Properties of a Refractory MoTaNbWV High-Entropy Alloy: Metallurgical Considerations and Extensive Variable Correlation Analysis

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