Contact-reactive brazing mechanism of Al0.3CoCrFeNi high-entropy alloys using a niobium interlayer

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外文摘要：The contact-reactive brazing of Al0.3CoCrFeNi high-entropy alloys with a Nb interlayer was researched.The effects of Nb thickness and brazing temperature on the interfacial microstructure and mechanical properties of Al0.3CoCrFeNi joints were investigated.The results show that with Nb thickness increasing from 10 to 100 μm,the average width of Al0.3-CoCrFeNi joints is increased from 127 to 492 μm and the erosion volume of Al0.3CoCrFeNi base metals(BMs)by face-centered cubic-Nb eutectic liquid is enlarged accordingly.With increasing brazing temperature from 1280 to 1360℃,the intergranular penetration of eutectic liquid into Al0.3CoCrFeNi BMs becomes more severe and lamellar Laves phase is broken-up and spherized.The shear strength of joint is increased gradually from 374 to 486 MPa and then decreased to 475 MPa.The maximum shear strength value of 486 MPa is obtained when brazing at 1340℃ for 10 min,reaching about 78%of the shear strength of Al0.3CoCrFeNi BMs.Besides,the brazing mechanism was analyzed in details.

外文关键词：

Contact-reactive brazingHigh-entropy alloyIntergranular penetrationShear strengthMechanism

作者：

Yu Lei、Yi-nan Li、Xiao-guo Song、Sheng-peng Hu、Wei-min Long、Hai-chuan Shi、Zu-bin Chen

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作者单位：

School of Mechanical and Automotive Engineering,Qingdao University of Technology,Qingdao 266000,Shandong,China

State Key Laboratory of Precision Welding and Joining of Materials and Structures,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China

State Key Laboratory of Advanced Brazing Filler Metals and Technology,Zhengzhou Research Institute of Mechanical Engineering,Zhengzhou 450001,Henan,China

School of Materials Science and Engineering,Shanghai University of Engineering Science,Shanghai 201620,China

Yantai Research Institute,Harbin Engineering University,Yantai 264006,Shandong,China

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基金：

Outstanding Youth Innovation Team in Universities of Shandong ProvinceNational Natural Science Foundation of ChinaNatural Science Foundation of Shandong Province,China

项目编号：

2023KJ11452305344ZR2022QE073

出版年：

2024

DOI：

10.1007/s42243-024-01314-2

钢铁研究学报(英文版)

钢铁研究总院

钢铁研究学报(英文版)

CSTPCD

影响因子：0.584

ISSN：1006-706X

年,卷(期)：2024.31(10)