Phase formation and thermal stability of CoCrFeNi and CoCrFeMnNi equiatomic high entropy alloys

2019 ◽  
Vol 774 ◽  
pp. 856-864 ◽  
Author(s):  
M. Vaidya ◽  
K. Guruvidyathri ◽  
B.S. Murty
Keyword(s):  
Thermal Stability ◽  
Phase Formation ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Thermal Stability Of

scholarly journals Effects of La on Thermal Stability, Phase Formation and Magnetic Properties of Fe–Co–Ni–Si–B–La High Entropy Alloys

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1907
Author(s):  
Jiaming Li ◽  
Jianliang Zuo ◽  
Hongya Yu
Keyword(s):  
Thermal Stability ◽  
Magnetic Properties ◽  
Saturation Magnetization ◽  
Phase Formation ◽  
Crystallization Temperature ◽  
High Entropy Alloys ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
High Entropy ◽  
Bcc Phase

The microstructure, phase formation, thermal stability and soft magnetic properties of melt-spun high entropy alloys (HEAs) Fe27Co27Ni27Si10−xB9Lax with various La substitutions for Si (x = 0, 0.2, 0.4, 0.6, 0.8, and 1) were investigated in this work. The Fe27Co27Ni27Si10−xB9La0.6 alloy shows superior soft magnetic properties with low coercivity Hc of ~7.1 A/m and high saturation magnetization Bs of 1.07 T. The content of La has an important effect on the primary crystallization temperature (Tx1) and the secondary crystallization temperature (Tx2) of the alloys. After annealing at relatively low temperature, the saturation magnetization of the alloy increases and the microstructure with a small amount of body-centered cubic (BCC) phase embedded in amorphous matrix is observed. Increasing the annealing temperature reduces the magnetization due to the transformation of BCC phase into face-centered cubic (FCC) phase.

scholarly journals Thermal Stability of High Entropy Alloys during in Situ TEM Heating.

2018 ◽  
Vol 24 (S1) ◽  
pp. 1928-1929 ◽  
Author(s):  
Elaf A. Anber ◽  
Andrew C Lang ◽  
Eric A. Lass ◽  
Pranav Kumar Suri ◽  
Daniel Scotto D'Antuono ◽  
...  
Keyword(s):  
Thermal Stability ◽  
In Situ Tem ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Thermal Stability Of

scholarly journals Thermal Stability of Medium- and High-Entropy Alloys of 3d-Transition Metals

2021 ◽  
Author(s):  
A. Fourmont ◽  
A. S. Rogachev ◽  
S. Le Gallet ◽  
O. Politano ◽  
D. Yu. Kovalev ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Transition Metals ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Thermal Stability Of

A thermodynamic study on phase formation and thermal stability of AlSiTaTiZr high-entropy alloy thin films

2020 ◽  
Vol 838 ◽  
pp. 155580
Author(s):  
Felipe Cemin ◽  
Mawin J.M. Jimenez ◽  
Leonardo M. Leidens ◽  
Carlos A. Figueroa ◽  
Fernando Alvarez
Keyword(s):  
Thin Films ◽  
Thermal Stability ◽  
Phase Formation ◽  
Thermodynamic Study ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Thermal Stability Of

Influence of Al content on thermal stability of nanocrystalline AlxCoCrFeNi high entropy alloys at low and intermediate temperatures

2020 ◽  
Vol 31 (5) ◽  
pp. 1985-1993 ◽  
Author(s):  
Mohan Muralikrishna Garlapati ◽  
Mayur Vaidya ◽  
Anirudha Karati ◽  
Soumyaranjan Mishra ◽  
Rahul Bhattacharya ◽  
...  
Keyword(s):  
Thermal Stability ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Al Content ◽  
Thermal Stability Of

scholarly journals Microstructure and Thermal Analysis of Metastable Intermetallic Phases in High-Entropy Alloy CoCrFeMo0.85Ni

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1073
Author(s):  
Zihui Dong ◽  
Dmitry Sergeev ◽  
Michael F. Dodge ◽  
Francesco Fanicchia ◽  
Michael Müller ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Single Phase ◽  
Intermetallic Phases ◽  
High Entropy Alloy ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Potential Applications ◽  
Thermal Stability Of ◽  
Liquidus Temperatures

CoCrFeMoNi high entropy alloys (HEAs) exhibit several promising characteristics for potential applications of high temperature coating. In this study, metastable intermetallic phases and their thermal stability of high-entropy alloy CoCrFeMo0.85Ni were investigated via thermal and microstructural analyses. Solidus and liquidus temperatures of CoCrFeMo0.85Ni were determined by differential thermal analysis as 1323 °C and 1331 °C, respectively. Phase transitions also occur at 800 °C and 1212 °C during heating. Microstructure of alloy exhibits a single-phase face-centred cubic (FCC) matrix embedded with the mixture of (Co, Cr, Fe)-rich tetragonal phase and Mo-rich rhombohedron-like phase. The morphologies of two intermetallics show matrix-based tetragonal phases bordered by Mo-rich rhombohedral precipitates around their perimeter. The experimental results presented in our paper provide key information on the microstructure and thermal stability of our alloy, which will assist in the development of similar thermal spray HEA coatings.

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