The microstructure and properties of (FeCrNiCo)Al Cu  high-entropy alloys and their TiC-reinforced composites

Fan, Qunchao; Li, B.S.; Zhang, Y.

doi:10.1016/j.msea.2014.01.044

Cited by 98 publications

(26 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Zhao et al [25] sintered the TiB 2 /CoCrFeNiMn 0.5 Ti 0.5 high entropy alloys, and found that when the content of TiB 2 was 10%, the Vickers hardness and flexural strength of alloys were 2174.64 HV and 427.69 MPa respectively. Fan et al [26] studied the microstructure and mechanical properties of (FeCrNiCo) Al x Cu y high-entropy alloys and their TiC reinforced composites, the results show that addition of TiC increased the comprehensive mechanical properties of the high-entropy alloy matrix tremendously, and when the TiC content was 10 vol%, the hardness, yield stress and fracture stress were as high as 621 HV, 1637 MPa and 2972 MPa, respectively. Fu et al [27] prepared a series of TiB 2 -TiNiFeCrCoAl highentropy alloy composites, the addition of TiB 2 to HEA can enhance the densification significantly, when the TiB 2 was 20 wt%, the grain size, hardness and indentation fracture toughness of alloys were 0.74 ± 0.07 μm, 17.5 ± 1.2 GPa and 12.8 ± 0.6 MPa m 1/2 , respectively.…”

Section: Introductionmentioning

confidence: 99%

The effect of TiC addition on the microstructure and mechanical properties of Al0.6CrFe2Ni2 high entropy alloys

Zhang

et al. 2020

SN Appl. Sci.

View full text Add to dashboard Cite

To enhance the strength of single FCC phase high entropy alloys, TiC was selected as reinforced phase to improve the properties of high entropy alloys (HEAs). Therefore, a series of TiC/Al 0.6 CrFe 2 Ni 2 high entropy alloys with different TiC content which ranging from 0 to 5 vol% were prepared by vacuum arc melting furnace. The phase compositions, microstructures and mechanical properties of alloys were investigated detailedly. The results show that TiC has no effect on phase composition of the alloys, but the addition of ceramic phase TiC has an advantageous effect on the mechanical properties of alloys, the yield strength of TiC/Al 0.6 CrFe 2 Ni 2 HEAs increases due to the refined of grain size, when TiC content is 2.50 vol%, alloy has better properties, the yield strength and Vickers hardness are 576.93 MPa and 244 HV, respectively.

show abstract

Section: Introductionmentioning

confidence: 99%

The effect of TiC addition on the microstructure and mechanical properties of Al0.6CrFe2Ni2 high entropy alloys

Zhang

et al. 2020

SN Appl. Sci.

View full text Add to dashboard Cite

show abstract

“…The combination of the ultra-fine grain and nanosized reinforcing particles can enhance the strength of the composite material through the Hall-Petch effect and the strengthening of dislocations [26,27]. At the same time, the in-situ method can make the interfaces between the ceramic and the metal substrate cleaner, showing stronger bonding forces between materials that strengthen the mechanical properties of the composite material [28].As demonstrated above, the precipitation strengthening effects in HEAs have been extensively investigated [13,14,[29][30][31][32][33]. However, the high-temperature tribological properties of ceramic-reinforced HEAs have rarely been reported.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

Microstructures and Tribological Properties of TiC Reinforced FeCoNiCuAl High-Entropy Alloy at Normal and Elevated Temperature

Zhu

Zhou

et al. 2020

Metals

View full text Add to dashboard Cite

Recent studies have suggested that high-entropy alloys (HEAs) possess high fracture toughness, good wear resistance, and excellent high-temperature mechanical properties. In order to further improve their properties, a batch of TiC-reinforced FeCoNiCuAl HEA composites were fabricated by mechanical alloying and spark plasma sintering. X-ray diffractometry analysis of the TiC-reinforced HEA composites, combined with scanning electron microscopy imaging, indicated that TiC particles were uniformly distributed in the face-centered cubic and body-centered cubic phases. The room temperature hardness of the FeCoNiCuAl HEA was increased from 467 to 768 HV with the addition of TiC, owing to precipitation strengthening and fine grain strengthening effects. As the TiC content increased, the friction coefficient of the FeCoNiCuAl HEA first increased and then decreased at room temperature, due to the transition of the wear mechanism from adhesive to abrasive behavior. At higher temperature, the friction coefficient of the FeCoNiCuAl HEA monotonously reduced, corresponding well with the transition from adhesive wear to oxidative wear.wear resistance of HEAs [8,9]. Recently, it was reported that the addition of Cu can reduce the wear rate of CoCrFeNiCux HEAs at both room temperature and elevated temperatures, and wear resistance at elevated temperatures is promoted more significantly than that at room temperature due to their self-lubricating mechanism [10].However, the major challenge for practical applications of the FeCoNiCuAl HEA is its insufficient strength. Recent studies have indicated that the precipitation of reinforcing phases in various materials, such as HEAs and ceramics, can further increase the yield strength of the alloy while maintaining relatively high ductility [11][12][13]. For instance, the precipitation of SiC nanoparticles in FeCoCrNiMn enhanced the compressive yield strength from 1180 to 1480 MPa at room temperature [14]. The precipitation of WC in the FeCoCrNi HEA leads to an improved hardness up to 768HV, which corresponds well with the transition of the wear mechanism [13]. The alloy may also be strengthened by dispersion strengthening, which can significantly improve the strength and hardness of the alloy, and reduce the plasticity and toughness slightly [15]. TiC is considered a good candidate as the strengthening phase due to its high melting point, high hardness, low density, good metal matrix wettability, good chemical stability, and excellent wear resistance [16]. The optimized yield strength of the (FeCrNiCo)Al 0.75 Cu 0.25 HEA reinforced by TiC particles can reach 1637 MPa, which is increased by 90.6% compared to the (FeCrNiCo)Al 0.75 Cu 0.25 HEA [17]. However, the precipitation of ceramic nanoparticles in the metal matrix tends to be unevenly distributed, which is probably originated from the instability of the interfaces between the ceramic particles and the metal matrix [18][19][20]. In order to make the second phase uniformly distributed in the matrix, in situ methods are widely used to fa...

show abstract

“…In this project, the development of Fe45Ni25Cr25Mo5 alloy, a multiphase iron-based hypoeutectic HEA with high ductility but restricted strength will be studied. It is worth to note that this HEA is more cost-effective when compared to the equiatomic HEAs, as the iron content is higher, which can further reduce the cost [53]. However, the hardness of the as-cast Fe45Ni25Cr25Mo5 alloy is about 202 HV, which is not desired.…”

Section: Limitations Of Heasmentioning

confidence: 99%

“…Hence, the reinforcement effect of the combination of titanium and carbon was studied in (FeCrNiCo)Al0.75Cu 0.25 + 10 vol.% TiC composite and it has been proved to have extraordinary mechanical properties, specifically high yield strength of 1637 MPa, high fracture strength of 2972 MPa, and plastic strain of 31.8% [53]. The strong interfacial bonding of the titanium carbide with the matrix of (FeCrNiCo)Al0.75Cu 0.25 alloy increased the hardness of the HEA tremendously.…”

Section: Titanium Carbide and Molybdenum Carbidementioning

confidence: 99%

UQ eSpace

Koey¹

View full text Add to dashboard Cite

The strength of the Fe45Ni25Cr25Mo5 high-entropy alloy was reinforced through precipitation hardening and minor addition of titanium and carbon elements. The aged Fe45Ni25Cr25Mo5 alloy obtained a peak hardness of 307.12 HV at 900 ˚C for 48 hours. This alloy was strengthened through the formation of long thin needle-like ! phase precipitates. 5 at.% of titanium and carbon were added to the alloy respectively to further improve its strength and restrict the growth of the needle-like precipitates during aging treatment. The involvement of the reinforcement content induced the formation of (Ti, Mo, C)-rich carbides, and hence increased the hardness of the alloy to 246.45 HV. Aging treatment was performed in (Fe45Ni25Cr25Mo5)90Ti5C5 alloy to investigate the strength evolution of this alloy. The best aging performance was obtained when the alloy was aged at 800 ˚C for 96 hours with an optimum hardness of 402.24 HV. The minor elemental addition has refined the needle-like precipitates from the size larger than 20 µm to the size smaller than 10 µm. As a result, (Fe45Ni25Cr25Mo5)90Ti5C5 alloy was reinforced by the high volume fraction of fine needle-like precipitates and nanosized precipitates, fine divorced eutectic structures, as well as the (Ti, Mo, C)-rich carbides.

show abstract

The microstructure and properties of (FeCrNiCo)Al Cu high-entropy alloys and their TiC-reinforced composites

Cited by 98 publications

References 23 publications

The effect of TiC addition on the microstructure and mechanical properties of Al0.6CrFe2Ni2 high entropy alloys

The effect of TiC addition on the microstructure and mechanical properties of Al0.6CrFe2Ni2 high entropy alloys

Microstructures and Tribological Properties of TiC Reinforced FeCoNiCuAl High-Entropy Alloy at Normal and Elevated Temperature

UQ eSpace

Contact Info

Product

Resources

About