scholarly journals A Review of the Latest Developments in the Field of Refractory High-Entropy Alloys

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 612
Author(s):  
Muthe Srikanth ◽  
A. Raja Annamalai ◽  
A. Muthuchamy ◽  
Chun-Ping Jen
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Oxidation Resistance ◽  
Strengthening Mechanism ◽  
High Temperature Strength ◽  
High Entropy Alloys ◽  
Temperature Oxidation ◽  
High Entropy ◽  
Refractory Elements ◽  
Insight Into

This review paper provides insight into current developments in refractory high-entropy alloys (RHEAs) based on previous and currently available literature. High-temperature strength, high-temperature oxidation resistance, and corrosion resistance properties make RHEAs unique and stand out from other materials. RHEAs mainly contain refractory elements like W, Ta, Mo, Zr, Hf, V, and Nb (each in the 5–35 at% range), and some low melting elements like Al and Cr at less than 5 at%, which were already developed and in use for the past two decades. These alloys show promise in replacing Ni-based superalloys. In this paper, various manufacturing processes like casting, powder metallurgy, metal forming, thin-film, and coating, as well as the effect of different alloying elements on the microstructure, phase formation, mechanical properties and strengthening mechanism, oxidation resistance, and corrosion resistance, of RHEAs are reviewed.

AK STEEL 441

Alloy Digest ◽  
2006 ◽  
Vol 55 (6) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Ferritic Stainless Steel ◽  
High Temperature Oxidation ◽  
High Temperature Strength ◽  
Temperature Oxidation ◽  
Temperature Performance

Abstract AK Steel 441 has good high-temperature strength, an equiaxed microstructure, and good high-temperature oxidation resistance. The alloy is a niobium-bearing ferritic stainless steel. This datasheet provides information on composition, hardness, and tensile properties as well as deformation. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-965. Producer or source: AK Steel.

Effect of Al content on high temperature oxidation resistance of AlxCoCrCuFeNi high entropy alloys (x=0, 0.5, 1, 1.5, 2)

Vacuum ◽  
2019 ◽  
Vol 169 ◽  
pp. 108837 ◽  
Author(s):  
Y.Y. Liu ◽  
Z. Chen ◽  
Y.Z. Chen ◽  
J.C. Shi ◽  
Z.Y. Wang ◽  
...  
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
High Entropy Alloys ◽  
Temperature Oxidation ◽  
High Entropy ◽  
Al Content

AK STEEL 18 Cr-Cb HF

Alloy Digest ◽  
2006 ◽  
Vol 55 (4) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Grain Structure ◽  
High Temperature Strength ◽  
Temperature Oxidation ◽  
Equiaxed Microstructure ◽  
Temperature Performance

Abstract AK Steel 18 Cr-Cb HF has an equiaxed microstructure, good high-temperature strength, and good high-temperature oxidation resistance. The alloy was designed to provide improved formability, particularly in multiple forming operations, due in part to a finer final annealed grain structure. This datasheet provides information on composition, hardness, and tensile properties as well as deformation. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-960. Producer or source: AK Steel.

High temperature oxidation resistance of W-containing high entropy alloys

2021 ◽  
pp. 162733
Author(s):  
Ahmad Ostovari Moghaddam ◽  
Mikhail Sudarikov ◽  
Nataliya Shaburova ◽  
Dmitry Zherebtsov ◽  
Vladimir Zhivulin ◽  
...  
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
High Entropy Alloys ◽  
Temperature Oxidation ◽  
High Entropy

scholarly journals High-Temperature Oxidation Behavior of AlTiNiCuCox High-Entropy Alloys

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5319
Author(s):  
Junfeng Wang ◽  
Qiaobai He ◽  
Guanqi Liu ◽  
Qi Zhang ◽  
Guotan Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Oxide Film ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Film Surface ◽  
High Entropy Alloys ◽  
Temperature Oxidation ◽  
High Entropy ◽  
High Temperature Oxidation Behavior ◽  
Oxide Film Surface

In this study, the high-temperature oxidation behavior of a series of AlTiNiCuCox high-entropy alloys (HEAs) was explored. The AlTiNiCuCox (x = 0.5, 0.75, 1.0, 1.25, 1.5) series HEAs were prepared using a vacuum induction melting furnace, in which three kinds of AlTiNiCuCox (x = 0.5, 1.0, 1.5) alloys with different Co contents were oxidized at 800 °C for 100 h, and their oxidation kinetic curves were determined. The microstructure, morphology, structure, and phase composition of the oxide film surface and cross-sectional layers of AlTiNiCuCox series HEAs were analyzed using scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), and X-ray diffraction (XRD). The influence of Co content on the high-temperature oxidation resistance of the HEAs was discussed, and the oxidation mechanism was summarized. The results indicate that, at 800 °C, the AlTiNiCuCox (x = 0.5, 1.0, 1.5) series HEAs had dense oxide films and certain high-temperature oxidation resistance. With increasing Co content, the high-temperature oxidation resistance of the alloys also increased. With increasing time at high temperature, there was a significant increase in the contents of oxide species and Ti on the oxide film surface. In the process of high-temperature oxidation of AlTiNiCuCox series HEAs, the interfacial reaction, in which metal elements and oxygen in the alloy form ions through direct contact reaction, initially dominated, then the diffusion process gradually became the dominant oxidation factor as ions diffused and were transported in the oxide film.

The role of Si on microstructure and high-temperature oxidation of CoCr2FeNb0.5Ni high-entropy alloys coating

2021 ◽  
pp. 109417
Author(s):  
Minyu Ma ◽  
Aihua Han ◽  
Zunjun Zhang ◽  
Yong Lian ◽  
Chao Zhao ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
High Entropy Alloys ◽  
Temperature Oxidation ◽  
High Entropy

Enhanced High-Temperature Strength of HfNbTaTiZrV Refractory High-Entropy Alloys by AI 2O 3 Reinforcement

2021 ◽  
Author(s):  
Bingjie Wang ◽  
Qianqian Wang ◽  
Nan Lu ◽  
Bo Sun ◽  
Xiubing Liang ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Strength ◽  
High Entropy Alloys ◽  
High Entropy
Sign in / Sign up

Export Citation Format

Share Document