Microstructure and mechanical properties of refractory MoNbHfZrTi high-entropy alloy

Guo, Ning; Wang, Li; Luo, Liangshun; Li, X.Z.; Su, Yanqing; Guo, Jingjie; Fu, Heng Zhi

doi:10.1016/j.matdes.2015.05.019

Cited by 292 publications

(57 citation statements)

References 30 publications

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“…Usually, the structure of the alloys is reported either in as-solidified condition or after homogenization heat treatment at very high temperatures (1200-1400 • C) . Sometimes, structure after plastic deformation at lower temperatures (600-1200 • C) is also examined [12][13][14]19,20,23,25,33], but relatively short high-temperature exposure times during mechanical testing may not be sufficient to produce equilibrium phases in the tested alloy [14]. If the alloy exhibits phase transformations at temperatures below the homogenization temperature, the long high-temperature exposure can result in the drastic changes in microstructure and resulting mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Phase Evolution of the AlxNbTiVZr (x = 0; 0.5; 1; 1.5) High Entropy Alloys

Yurchenko

Stepanov

Tikhonovsky

et al. 2016

Metals

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Al x NbTiVZr (x = 0; 0.5; 1; 1.5) high entropy alloys were fabricated by vacuum arc melting and annealed at 1200 • C for 24 h. The NbTiVZr alloy had single body centered cubic (bcc) solid solution phase after annealing at 1200 • C, while, in the Al-containing alloys, C14 Laves and Zr 2 Al-type phases are found. The alloys were subjected to annealing at 800 • C and 1000 • C. It was shown that annealing temperature (800 • C or 1000 • C) weakly affected the produced phases but the Al content had pronounced effect on structure of the annealed alloys. The NbTiVZr alloy decomposed into bcc, Zr-rich hexagonal close-packed (hcp), and C15 Laves phases. In the Al 0.5 NbTiVZr alloy, the bcc matrix phase also decomposed into a mixture of bcc and C14 Laves phases. In the AlNbTiVZr alloy, annealing resulted in an increase of volume fraction of Zr 2 Al-type phase. Finally, in the Al 1.5 NbTiVZr alloy, formation of AlNb 2 -type phase was observed. The highest fraction of second phases appeared after annealing in the NbTiVZr alloy. It is demonstrated that the strong chemical affinity and high enthalpy of formation of intermetallic phases in Al-Zr atomic pair govern the intermetallic phase formation in the alloys at 1200 • C. Increase of volume fraction of second phases in the alloys due to annealing at 800 • C and 1000 • C is in proportion to the decrease of Zr concentration in the bcc matrix phase.

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Section: Introductionmentioning

confidence: 99%

Phase Evolution of the AlxNbTiVZr (x = 0; 0.5; 1; 1.5) High Entropy Alloys

Yurchenko

Stepanov

Tikhonovsky

et al. 2016

Metals

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“…For instance, Li et al [20] found 3-times increase in yield strength under compression for CoCrFeNi high entropy alloy, owed to substantial supercooling. Guo et al [21] obtained a refractory high entropy alloy forming bcc-MoNbHfZrTi solid solution with high yield strength of 1.7 GPa measured in compression tests performed at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties and structure of rapidly solidified bulk Fe89−xHf4Ta1Cu1Gd1SixB4 (x=0–15) and Fe74Hf4Ta1Cu1Gd1LaySi15−yB4 (y=7) alloys

Bardziński

Błyskun

2016

Materials & Design

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“…Guo Jianbin [7] melted out of four groups of high entropy alloy, ZrTiHfVNb, ZrTiHfNbMo, ZrTiHfVTa and TaMoWNbZr, and he carried out a compression experiment and measured the values of yield strength, which are respectively 1152MPa, 1134MPa, and 1089MPa. However, with the increases in the experimental load, the three kinds of alloys were soon broken, and the measured plastic strain is lower.…”

Section: Fig 1 Schematic Diagram Of Lattice Distortion Of High Entrmentioning

confidence: 99%

Properties and Preparation of High Entropy Alloys

Yin

2018

MATEC Web Conf.

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Abstract. As a consequence of multi-components, the high entropy alloys embodied serious cocktail party effect and lattice distortion. So high entropy alloys have high strength and hardness possess many comprehensive properties such as thermostability and corrosion resistance. Because of excellent mechanical properties and chemical properties, high entropy alloys have immeasurable potential of development. This paper mainly introduces the properties, preparations and applications of high entropy alloys, and finally summarizes them.

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Microstructure and mechanical properties of refractory MoNbHfZrTi high-entropy alloy

Cited by 292 publications

References 30 publications

Phase Evolution of the AlxNbTiVZr (x = 0; 0.5; 1; 1.5) High Entropy Alloys

Phase Evolution of the AlxNbTiVZr (x = 0; 0.5; 1; 1.5) High Entropy Alloys

Mechanical properties and structure of rapidly solidified bulk Fe89−xHf4Ta1Cu1Gd1SixB4 (x=0–15) and Fe74Hf4Ta1Cu1Gd1LaySi15−yB4 (y=7) alloys

Properties and Preparation of High Entropy Alloys

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