Interfacial Microstructure of FeCoNiCrAl0.1 High Entropy Alloy and Pure Copper Prepared by Explosive Welding

Coatings

Yuling Sun¹  Honghao Ma¹  Ming Yang¹  Zhaowu Shen¹  Qichao Tian¹  Yang Zhao²  Hanliang Liang³ 

[1] CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China;National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China;State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China;

关键词: high entropy alloys;    copper;    explosive welding;    composites;    interfacial microstructure;    electron backscattered diffraction;   

DOI  :  10.3390/coatings10121197

来源: DOAJ

【 摘 要 】

The FeCoNiCrAl_0.1 high entropy alloys (HEAs) and pure copper (Cu) composite plates were successfully fabricated by the explosive welding technique using two different gap distances. The interfacial microstructure, elemental distribution, grain structure of vortex zone and hardness were characterized using optical microscopy (OM), scanning electron microscopy (SEM), electron backscattered diffraction (EBSD), nanoindentation and micro-hardness tester. The explosive weldability window was calculated to verify the weldability of HEAs and Cu. The results indicated that the Cu/HEA composites presented typical wavy structures without visible defects and have an excellent bonding quality. The elements mixed and formed intermetallic compounds at the vortex zones. The grains near the vortex zones showed strong deformation, and phase transformation occurred. Compared with the matrix metals, the hardness of Cu and HEAs increased near the welding interface and sharply increased to 375 HV near the vortex zone.

【 授权许可】

Unknown