Microstructural evolution, mechanical and corrosion behaviors of as-annealed CoCrFeNiMo  (x = 0, 0.2, 0.5, 0.8, 1) high entropy alloys

Niu, Zuozhe; Wang, Yingzi; Geng, Chao; Xu, Jin; Wang, Yan

doi:10.1016/j.jallcom.2019.153273

Cited by 116 publications

(35 citation statements)

References 34 publications

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“…Besides, the study of fracture mechanism shows that the boundary between the grain and intermetallic precipitation is the weak part of the microporous nucleation, and the cracks mainly propagate along the interface between grain boundary and precipitation particles. Niu et al [17] investigated the as-annealed FeCoCrNiMox high entropy alloys, revealing annealing treatment induces Mo addition to be unstable, and the phase separation happens. Bae et al studied cold rolling and subsequent annealing treatment at different temperature of Co17.5Cr12.5Fe55Ni8Mo5 alloys, the structure is composed of FCC and µ phase, µ phase is the Mo-rich phase [18], but the mechanical/wear properties is less probing.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mo Element on the Mechanical Properties and Tribological Responses of CoCrFeNiMox High-Entropy Alloys

Liu

Xie

Cui

et al. 2021

Metals

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Certain amounts of precipitate in CoCrFeNiMox (simplified as Mox) is beneficial to the wear resistance; however, the optimal chemical content of Mo and the anti-wear mechanism behind it remains unclear. The Mox (x = 0, 0.3, 0.5, 1, 1.5 in molar ratio) high entropy alloys (HEAs) were manufactured, the evolution of their microstructure, mechanical, friction, and wear properties with Mo content was studied. The results displayed that the mechanical properties of the FCC solid solution were enhanced from Mo0 to Mo0.3, then kept unchanged till x = 1.5. The volume fraction of the precipitates increased with Mo content. The Mo1 presents the lower average friction coefficient and wear rate, attributed to the desired types, amount, size, distribution of the hard σ and μ phases in the ductile FCC solid solution. The detailed mechanism behind their tribological behaviors were discussed in the manuscript.

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Section: Introductionmentioning

confidence: 99%

Effect of Mo Element on the Mechanical Properties and Tribological Responses of CoCrFeNiMox High-Entropy Alloys

Liu

Xie

Cui

et al. 2021

Metals

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“…Among various FCC HEAs systems, several HEAs have been frequently selected as model materials to study the fundamental deformation mechanisms and related mechanical properties. Figure shows plots of HV against

σ_{YS}

σ_{UTS}

for four representative FCC HEAs and stainless steels, i.e., CoCrFeMnNi, [ 35–48 ] CoCrNi, [ 49–52 ] CoCrFeNi, [ 45,48,53–58 ] and 316 stainless steels. [ 59–66 ] Herein, we selected 316 stainless steel as a model material to verify the difference between HEAs and traditional alloys with one principal element.…”

Section: Resultsmentioning

confidence: 99%

“…Plots of HV against a–d) tensile yield strength and ultimate tensile strength for a,e) CoCrFeMnNi, [ 35–48 ] b,f) CoCrNi, [ 49–52 ] c,g) CoCrFeNi, [ 45,48,53–58 ] and d,h) 316 stainless steels [ 59–66 ] with single‐phase FCC structures. The referenced three‐time line is included in each image.…”

Section: Resultsmentioning

confidence: 99%

“… General plots of HV against a,c) tensile yield strength and b,d) ultimate tensile strength of single‐phase FCC HEAs including Al 0.1 CoCrFeNi, [ 74–79 ] Al 0.25 CoCrFeNi, [ 28 ] Al 0.3 CoCrFeMnNi, [ 80 ] Al 0.3 CoCrFeNi, [ 81–84 ] CoCrFeMnNi, [ 35–48 ] (CoCrFeMnNi) x Al 100– x , [ 47 ] Co 20 Cr 26 Fe 20 Mn 20 Ni 14 , [ 45 ] CoCrFeNi, [ 45,48,53–58 ] CoCrNi, [ 49–52 ] Co 26 Cr 18.5 Fe 18.5 Mn 18.5 Ni 18.5 , [ 45 ] CoCuFeMnNi, [ 85,86 ] CoCuFeNi, [ 87 ] CoFeMnNi, [ 85 ] FeCoCrNi, [ 45,58 ] FeMnNi, [ 85 ] and 316 stainless steels. [ 59–66 ] The referenced three‐time line is included in each image.…”

Section: Resultsmentioning

confidence: 99%

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Correlating Strength and Hardness of High‐Entropy Alloys

Tian

et al. 2021

Adv Eng Mater

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Strength and hardness of metallic materials are reported to correlate in a specified form. Among various equations, yield strength is generally converted from Vickers hardness (HV) via a three‐time relation due to the simple and nondestructive nature of hardness testing. Herein, a through literature review is made and data of strength and HV for face‐centered cubic (FCC) and body‐centered cubic (BCC) high‐entropy alloys (HEA) are collected. The yield strength and HV visibly deviate from the three‐time relation, but the ultimate tensile strength and HV roughly follow the three‐time relation. New linear relationships, which are universally applied to convert HV to yield strength and ultimate tensile strength, are proposed.

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“…The influence of process parameters, such as temperature and pressure, on the properties of HEAs were also studied. The effects of temperature on the properties of HEAs were studied through processes such as: annealing and heat treatments [85][86][87][88][89][90][91][92][93][94][95][96][97][98][99][100][101][102][103][104] and thermomechanical processing [105][106][107][108]. A number of research groups reported how temperature affected the microstructures and mechanical properties of HEAs in various manufacturing processes [96,[109][110][111][112].…”

Section: Background and Conventional Methodsmentioning

confidence: 99%

Recent Advances in Additive Manufacturing of High Entropy Alloys and Their Nuclear and Wear-Resistant Applications

Sonal

Lee

2021

Metals

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Alloying has been very common practice in materials engineering to fabricate metals of desirable properties for specific applications. Traditionally, a small amount of the desired material is added to the principal metal. However, a new alloying technique emerged in 2004 with the concept of adding several principal elements in or near equi-atomic concentrations. These are popularly known as high entropy alloys (HEAs) which can have a wide composition range. A vast area of this composition range is still unexplored. The HEAs research community is still trying to identify and characterize the behaviors of these alloys under different scenarios to develop high-performance materials with desired properties and make the next class of advanced materials. Over the years, understanding of the thermodynamics theories, phase stability and manufacturing methods of HEAs has improved. Moreover, HEAs have also shown retention of strength and relevant properties under extreme tribological conditions and radiation. Recent progresses in these fields are surveyed and discussed in this review with a focus on HEAs for use under extreme environments (i.e., wear and irradiation) and their fabrication using additive manufacturing.

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Microstructural evolution, mechanical and corrosion behaviors of as-annealed CoCrFeNiMo (x = 0, 0.2, 0.5, 0.8, 1) high entropy alloys

Cited by 116 publications

References 34 publications

Effect of Mo Element on the Mechanical Properties and Tribological Responses of CoCrFeNiMox High-Entropy Alloys

Effect of Mo Element on the Mechanical Properties and Tribological Responses of CoCrFeNiMox High-Entropy Alloys

Correlating Strength and Hardness of High‐Entropy Alloys

Recent Advances in Additive Manufacturing of High Entropy Alloys and Their Nuclear and Wear-Resistant Applications

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