The crystallization process in a new multicomponent Fe-based bulk amorphous alloy: A kinetic study approach

Rezaei-Shahreza, P.; Hasani, Saeed; Seifoddini, Amir; Nabiałek, M.; Czaja, Paweł

doi:10.1016/j.matchar.2022.112602

Cited by 13 publications

(2 citation statements)

References 98 publications

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“…However, unlike for the compressed rods in Figure 7, although the extrusion time is only 300 s, which is much shorter than the compression time at 653 K and 663 K, the diffraction peaks of the AlZr2 and Zr6NiAl2 phases were observed for the XRD patterns of the gears. It has been reported that high-temperature deformation promotes the isothermal crystallization process of BMGs [30,31], so it is possible that such high extrusion stress further accelerated the crystallization process. Figure 13 shows SEM images of the center of the gears formed at different temperatures under a strain rate of 1 × 10 −3 s −1 .…”

Section: Superplastic Forming Of Gearsmentioning

confidence: 99%

Superplastic Forming of Zr-Based Bulk Metallic Glasses

Zhang,

Zhao,

Xiao

et al. 2023

Metals

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In this paper, the partially crystallized Zr70Cu13.5Ni8.5Al8 bulk metallic glasses (BMGs) were prepared, and their superplastic deformation ability in the supercooled liquid region was studied via compression over a wide range of strain rates from 5 × 10−4 s−1 to 1 × 10−2 s−1. It has been found that the superplastic deformation behavior of the BMGs is strongly dependent on the strain rate and temperature. The flow behavior of the BMGs transformed from Newtonian fluid to non-Newtonian fluid with the increase in the strain rate and the decrease in temperature. Based on the high-temperature compression results, a thermalplastic forming map was constructed, and the optimal superplastic forming parameters were obtained. Then, gears were successfully extruded using part of the optimal thermal processing parameters. Further studies showed that high-temperature extrusion induced the crystallization of the BMGs, which increased the microhardness of the gears.

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Section: Superplastic Forming Of Gearsmentioning

confidence: 99%

Superplastic Forming of Zr-Based Bulk Metallic Glasses

Zhang,

Zhao,

Xiao

et al. 2023

Metals

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“…In comparison, amorphous materials with metallic components are more compatible with Al and have similar coe cients of thermal expansion [10], easy diffusion between elements is conducive to improving the wettability of both, and smaller thermal mismatch stresses are conducive to reducing the stress concentration at the interface, thus forming a strong bonding surface with Al and signi cantly improving its mechanical properties [11]. Meanwhile, the Fe-amorphous materials can be easily obtained by the existing preparation process and have ultra-high hardness and strength, excellent wear and corrosion resistance, high recrystallization temperature and relatively low cost [12], but the existing research mainly focuses on studying the room temperature tribological properties of Fe-amorphous coatings under dry friction.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of Fe-amorphous and bionic microtexture in enhancing high-temperature tribological properties of Al-12Si piston materials

Wang,

Lin,

Yin

et al. 2024

Preprint

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This study designs new Fe-amorphous/Al-12Si piston composite materials. Study the effect and synergistic mechanism of the addition of Fe-amorphous and bionic micro-textured laser surface on the high-temperature friction performance of Al-12Si piston material under mixed lubrication conditions of B30 biodiesel and engine lubricating oil. The results indicate that the frictional properties of the untextured surface of the Fe-amorphous/Al-12Si composite material depend primarily on the amount of Fe-amorphous added. The 10 wt% Fe-amorphous/Al-12Si composite exhibits a dense, void-free microstructure with optimum anti-friction and anti-wear performance. It is noteworthy that the interaction between the "anchoring" effect caused by the Fe-amorphous addition and the synergistic effect of the bionic microtexture providing a stable lubricating environment further enhances the high-temperature friction properties of Al-12Si.

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