The effects of secondary elemental Mo or Ti addition in Al0.3CoCrFeNi high-entropy alloy on age hardening at 700°C

Shun, Tao-Tsung; Hung, Cheng-Hsin; Lee, Che-Fu

doi:10.1016/j.jallcom.2010.02.032

Cited by 168 publications

(38 citation statements)

References 18 publications

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“…According to the EDS results, the phase β is a Ti-enriched phase, indicating that the solid solubility of Ti in phase β is higher than that in phase α. This result is in accordance with Shun et al [15]. With the addition of Ti, the content of eutectic phase β decreases during the increase of proeutectic phase α.…”

Section: Resultssupporting

confidence: 92%

The Phase Evolution and Property of FeCoCrNiAlTix High-Entropy Alloying Coatings on Q253 via Laser Cladding

Zhang

Lin

et al. 2017

Coatings

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High-entropy alloys (HEAs) are emerging as a hot research frontier in the metallic materials field. The study on the effect of alloying elements on the structure and properties of HEAs may contribute to the progress of the research and accelerate the application in actual production. FeCoCrNiAlTi x (x = 0, 0.25, 0.5, 0.75, and 1 in at.%, respectively) HEA coatings with different Ti concentrations were produced on Q235 steel via laser cladding. The constituent phases, microstructure, hardness, and wear resistance of the coatings were investigated by XRD, SEM, microhardness tester and friction-wear tester, respectively. The results show that the structure of the coating is a eutectic microstructure of FCC and BCC 1 at x = 0. The structure of coatings consists of both proeutectic FCC phase and the eutectic structure of BCC 1 and BCC 2 . With the continuous addition of Ti, the amount of eutectic structure decreases. The average hardness of the FeCoCrNiAlTi x HEA coatings at x = 0, 0. 25, 0.5, 0.75, and 1 are 432.73 HV, 548.81 HV, 651.03 HV, 769.20 HV, and 966.29 HV, respectively. The hardness of coatings increases with the addition of Ti, where the maximum hardness is achieved for the HEA at x = 1. The wear resistance of the HEA coatings is enhanced with the addition of Ti, and the main worn mechanism is abrasive wear.

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Section: Resultssupporting

confidence: 92%

The Phase Evolution and Property of FeCoCrNiAlTix High-Entropy Alloying Coatings on Q253 via Laser Cladding

Zhang

Lin

et al. 2017

Coatings

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show abstract

“…[17,50] Addition of Mo to the system generally leads to the formation of (Cr, Mo, Co, Fe)-rich σ phase. [80][81][82][83][84][85][86][87] σ phase is a very hard and brittle intermetallic phase. As mentioned previously, it significantly enhances the hardness of the alloy but reduces its ductility/plasticity.…”

Section: Derivatives Of the Al-co-cr-cu-fe-ni Alloymentioning

confidence: 99%

“…700-800 • C) often still remain small-diameters on the scale of tens or hundreds of nanometers have been reported. [34,82] Another example is the NbSiTaTiZr amorphous alloy. The crystallization temperature of NbSiTaTiZr is higher than 800 • C. [23] This temperature of stability is probably the highest among reported amorphous metals.…”

Section: High Temperatures Properties and Structuralmentioning

confidence: 99%

High-Entropy Alloys: A Critical Review

Tsai

Yeh

2014

Materials Research Letters

2,497

853

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High-entropy alloys (HEAs) are alloys with five or more principal elements. Due to the distinct design concept, these alloys often exhibit unusual properties. Thus, there has been significant interest in these materials, leading to an emerging yet exciting new field. This paper briefly reviews some critical aspects of HEAs, including core effects, phases and crystal structures, mechanical properties, high-temperature properties, structural stabilities, and corrosion behaviors. Current challenges and important future directions are also pointed out.

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“…[158,159] The hardness of Al 0.3 CrFeCoNi HEA increases by %65% after aging at 700 C for 144 h, and the addition of Mo and Ti in minor amount has Table 1. The phase formation in AlxCoCrFeNi at different conditions.…”

Section: Age Hardening Behaviormentioning

confidence: 99%

High‐Entropy Alloys: Potential Candidates for High‐Temperature Applications – An Overview

2017

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Multi-principal elemental alloys, commonly referred to as high-entropy alloys (HEAs), are a new class of emerging advanced materials with novel alloy design concept. Unlike the design of conventional alloys, which is based on one or at most two principal elements, the design of HEA is based on multi-principal elements in equal or near-equal atomic ratio. The advent of HEA has revived the alloy design perception and paved the way to produce an ample number of compositions with different combinations of promising properties for a variety of structural applications. Among the properties possessed by HEAs, sluggish diffusion and strength retention at elevated temperature have caught wide attention. The need to develop new materials for high-temperature applications with superior high-temperature properties over superalloys has been one of the prime concerns of the high-temperature materials research community. The current article shows that HEAs have the potential to replace Ni-base superalloys as the next generation hightemperature materials. This review focuses on the phase stability, microstructural stability, and high-temperature mechanical properties of HEAs. This article will be highly beneficial for materials science and engineering community whose interest is in the development and understanding of HEAs for high-temperature applications.

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The effects of secondary elemental Mo or Ti addition in Al0.3CoCrFeNi high-entropy alloy on age hardening at 700°C

Cited by 168 publications

References 18 publications

The Phase Evolution and Property of FeCoCrNiAlTix High-Entropy Alloying Coatings on Q253 via Laser Cladding

The Phase Evolution and Property of FeCoCrNiAlTix High-Entropy Alloying Coatings on Q253 via Laser Cladding

High-Entropy Alloys: A Critical Review

High‐Entropy Alloys: Potential Candidates for High‐Temperature Applications – An Overview

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