CoNiFeNb0.45 eutectic multi-principal element alloy with excellent mechanical properties and corrosion resistance

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:777

Article

An, Xulong^1,2  Chu, Chengling^1,2  Zhao, Hui^1,2  Shen, Baolong^1,2  Zhou, Liang^3,4  Chu, Paul K.^5,6 

[1] Southeast Univ, Sch Mat Sci & Engn, Nanjing 211189, Peoples R China

[2] Southeast Univ, Jiangsu Key Lab Adv Metall Mat, Nanjing 211189, Peoples R China

[3] Jiangsu Sunray Technol CO LTD, Nanjing 211189, Peoples R China

[4] Engn Technol Res Ctr Dynam Sealing Mat Jiangsu Pr, Nanjing 211189, Peoples R China

[5] City Univ Hong Kong, Dept Phys, Dept Mat Sci & Engn, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China

[6] City Univ Hong Kong, Dept Biomed Engn, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China

关键词: CoNiFeNb0.45;    Eutectic multi-principal element alloy (EMPEA);    Mechanical properties;    Corrosion resistance;   

DOI  :  10.1016/j.msea.2020.139026

来源: Elsevier

【 摘 要 】

A novel CoNiFeNb0.45 eutectic multi-principal element alloy (EMPEA) with a dual-phase structure is designed and synthesized by arc melting and suction casting. The compression strength of the CoNiFeNb0.45 EMPEA is 2.5 GPa at room temperature and high compression strength (1.2 GPa), furthermore, the excellent ductility with 40% fracture strain are maintained at 700 degrees C. The dislocation walls in the soft fcc phase provide the CoNiFeNb0.45 EMPEA with high ductility and work hardening, while the dislocations pined in the fcc/laves phase boundaries provide the alloy with high strength. The CoNiFeNb0.45 EMPEA also has excellent corrosion resistance in 3.5 wt% NaCl at room temperature as manifested by a corrosion rate of merely 0.003 mm/y and activation energy of corrosion of 53.6 kJ/mol.

【 授权许可】

Free