scholarly journals Hydrogen embrittlement of additively manufactured AlCoCrFeNi2.1 eutectic high-entropy alloy

2022 ◽  
Vol 195 ◽  
pp. 110007
Author(s):  
Di Wan ◽  
Shuai Guan ◽  
Dong Wang ◽  
Xu Lu ◽  
Jun Ma
Metals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1296 ◽  
Author(s):  
Won-Hyuk Lee ◽  
Ki Beom Park ◽  
Kyung-Woo Yi ◽  
Sung Yong Lee ◽  
Kwangsuk Park ◽  
...  

V-Nb-Mo-Ta-W high-entropy alloy (HEA), one of the refractory HEAs, is considered as a next-generation structural material for ultra-high temperature uses. Refractory HEAs have low castability and machinability due to their high melting temperature and low thermal conductivity. Thus, powder metallurgy becomes a promising method for fabricating components with refractory HEAs. Therefore, in this study, we fabricated spherical V-Nb-Mo-Ta-W HEA powder using hydrogen embrittlement and spheroidization by thermal plasma. The HEA ingot was prepared by vacuum arc melting and revealed to have a single body-centered cubic phase. Hydrogen embrittlement which could be achieved by annealing in a hydrogen atmosphere was introduced to get the ingot pulverized easily to a fine powder having an angular shape. Then, the powder was annealed in a vacuum atmosphere to eliminate the hydrogen from the hydrogenated HEA, resulting in a decrease in the hydrogen concentration from 0.1033 wt% to 0.0003 wt%. The angular shape of the HEA powder was turned into a spherical one by inductively-coupled thermal plasma, allowing to fabricate spherical V-Nb-Mo-Ta-W HEA powder with a d50 value of 28.0 μm.


2018 ◽  
Vol 718 ◽  
pp. 43-47 ◽  
Author(s):  
Yakai Zhao ◽  
Dong-Hyun Lee ◽  
Woo-Jin Kim ◽  
Moo-Young Seok ◽  
Ju-Young Kim ◽  
...  

2018 ◽  
Vol 732 ◽  
pp. 105-111 ◽  
Author(s):  
Young Jin Kwon ◽  
Jong Woo Won ◽  
Sung Hyuk Park ◽  
Jeong Hun Lee ◽  
Ka Ram Lim ◽  
...  

Author(s):  
Shidong Zhang ◽  
Min Liu ◽  
Yun Luo ◽  
Lianbo Wang ◽  
Zemin Wang ◽  
...  

2021 ◽  
pp. 110073
Author(s):  
Xinfeng Li ◽  
Zheng Feng ◽  
Xiaolong Song ◽  
Yanfei Wang ◽  
Yong Zhang

Author(s):  
Junghoon Lee ◽  
Hanji Park ◽  
Myeonghyun Kim ◽  
Han-Jin Kim ◽  
Jin-yoo Suh ◽  
...  

2017 ◽  
Vol 135 ◽  
pp. 54-58 ◽  
Author(s):  
Yakai Zhao ◽  
Dong-Hyun Lee ◽  
Moo-Young Seok ◽  
Jung-A Lee ◽  
M.P. Phaniraj ◽  
...  

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