The potential of mechanical alloying to improve the strength and ductility of Mo–9Si–8B–1Zr alloys – experiments and simulation

Krüger, Manja; Kauss, Olha; Naumenko, Konstantin; Burmeister, Christine; Wessel, E.; Schmelzer, Janett

doi:10.1016/j.intermet.2019.106558

Cited by 13 publications

(4 citation statements)

References 49 publications

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“…Krüger et al used the mean field homogenization method to study the effect of the matrix type of the multiphase Mo-Si-B alloy on stress-strain behavior. In the process of high-temperature deformation, there is a high stress in the silicide phases, and the deformation performance of the alloys is mainly determined by the Mo ss phase [18]. However, due to the ease with which Mo is oxidized to MoO 3 and volatilized, the Mo ss phase exhibits poor oxidation resistance.…”

Section: Mo-si-b Alloymentioning

confidence: 99%

Review of Research Progress on Mo–Si–B Alloys

Yakang,

Wang,

Chen

et al. 2023

Materials

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Mo-Si-B alloys are a crucial focus for the development of the next generation of ultra-high-temperature structural materials. They have garnered significant attention over the past few decades due to their high melting point and superior strength and oxidation resistance compared to other refractory metal alloys. However, their low fracture toughness at room temperature and poor oxidation resistance at medium temperature are significant barriers limiting the processing and application of Mo-Si-B alloys. Therefore, this review was carried out to compare the effectiveness of doped metallic elements and second-phase particles in solving these problems in detail, in order to provide clear approaches to future research work on Mo-Si-B alloys. It was found that metal doping can enhance the properties of the alloys in several ways. However, their impact on oxidation resistance and fracture toughness at room temperature is limited. Apart from B-rich particles, which significantly improve the high-temperature oxidation resistance of the alloy, the doping of second-phase particles primarily enhances the mechanical properties of the alloys. Additionally, the application of additive manufacturing to Mo-Si-B alloys was discussed, with the observation of high crack density in the alloys prepared using this method. As a result, we suggest a future research direction and the preparation process of oscillatory sintering, which is expected to reduce the porosity of Mo-Si-B alloys, thereby addressing the noted issues.

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Section: Mo-si-b Alloymentioning

confidence: 99%

Review of Research Progress on Mo–Si–B Alloys

Yakang,

Wang,

Chen

et al. 2023

Materials

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“…What needs to be added in particular is that, in our previous study [ 15 ], the oscillatory frequency of 9 Hz resulted in a gain in alloy grain refinement and an improvement of mechanical properties. Furthermore, due to its excellent high-temperature stability, ZrB 2 has been widely used in SiC ceramic materials and zircaloy-4 alloys to improve its high-temperature oxidation resistance by increasing the viscosity and stability of the SiO 2 layer [ 16 , 17 ]. Specially, in Guojun Zhang’s research, although Zr or ZrB 2 were added, the density of the alloy could only be maintained between 94% and 95%, and its high porosity was closely related to the limitations of its hot-pressing process.…”

Section: Introductionmentioning

confidence: 99%

Plasma Oscillatory Pressure Sintering of Mo-9Si-8B Alloy with ZrB2 Addition

Xiangyu

Guo

et al. 2022

Materials

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Oscillatory pressure sintering is a novel crystal refinement technology. The doping of different concentrations of ZrB2 under oscillatory sintering technology (9 Hz) is discussed here, focusing on its macroscopic mechanics and oxidation resistance. In particular, doping 2.5 wt% ZrB2 can effectively increase the hardness of the alloy, slightly increase the fracture toughness of the alloy and have an outstanding effect on the oxidation resistance of the alloy at 1300 °C, achieving the effect of reducing mass loss by 80.3%.

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“…However, the development of new alloys is extremely time-and cost-consuming. To reduce the costs required for experimental analysis, multi-scale modeling of materials behavior and structural analysis of components of creep behavior can be performed [22][23][24]. In addition, appropriate creep models are required for the structural analysis of turbine blades.…”

Section: Introductionmentioning

confidence: 99%

Temperature Resistance of Mo3Si: Phase Stability, Microhardness, and Creep Properties

Kauss

Obert

Bogomol

et al. 2021

Metals

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Mo-Si-B alloys are one of the most promising candidates to substitute Ni based superalloys in gas turbines. The optimization of their composition can be achieved more effectively using multi-scale modeling of materials behavior and structural analysis of components for understanding, predicting, and screening properties of new alloys. Nevertheless, this approach is dependent on data on the properties of the single phases in these alloys. The focus of this investigation is Mo3Si, one of the phases in typical Mo-Si-B alloys. The effect of 100 h annealing at 1600 °C on phase stability and microhardness of its three near-stoichiometric compositions—Mo-23Si, Mo-24Si and Mo-25Si (at %)—is reported. While Mo-23Si specimen consist only of Mo3Si before and after annealing, Mo-24Si and Mo-25Si comprise Mo5Si3 and Mo3Si before annealing. The latter is then increased by the annealing. No significant difference in microhardness was detected between the different compositions as well as after annealing. The creep properties of Mo3Si are described at 1093 °C and 1300 °C at varying stress levels as well as at 300 MPa and temperatures between 1050 °C and 1350 °C. Three constitutive models were used for regression of experimental results—(i) power law with a constant creep exponent, (ii) stress range dependent law, and (iii) power law with a temperature-dependent creep exponent. It is confirmed that Mo3Si has a higher creep resistance than Moss and multi-phase Mo-Si-B alloys, but a lower creep strength as compared to Mo5SiB2.

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The potential of mechanical alloying to improve the strength and ductility of Mo–9Si–8B–1Zr alloys – experiments and simulation

Cited by 13 publications

References 49 publications

Review of Research Progress on Mo–Si–B Alloys

Review of Research Progress on Mo–Si–B Alloys

Plasma Oscillatory Pressure Sintering of Mo-9Si-8B Alloy with ZrB2 Addition

Temperature Resistance of Mo3Si: Phase Stability, Microhardness, and Creep Properties

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