课题组新闻

博士生唐可关于大尺寸高熵合金制备及性能的论文被MSE-A 接收录用!


2019-06-16

这是课题组关于高熵合金的第三篇论文,祝贺唐可同学, 感谢其它同学和老师! 

唐可,继续努力,争取更多成果,早日毕业! 

 

 Development of a large size FCC highentropy alloy with excellent mechanical properties

K. Tanga, L.B. Chen, S. Wang, R. Wei, Z.Y. Yang, F. Jiang,*  J. Sun
a State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiao tong University,
Xi'an, 710049, China
b School of Materials Science and Engineering, Zhengzhou University, Zhengzhou,
450001, China 

Abstract
A large size 10 kg Fe40Mn40Co10Cr10 high-entropy alloy (HEA) with 3.3 at. % Cdoped was prepared by electromagnetic levitation melting. The hot
deformation behavior of the as-cast ingot was investigated to guide the hot forging process. Annealing was further conducted on the as-forged samples to
obtain more optimized mechanical properties. The as-forged HEA had yield strength (YS) of 792 MPa, ultimate tensile strength of 1055 MPa and a
satisfactory fracture elongation (EL) of 22.6%. The YS of the HEA annealed at 1050 °C increased from 393 MPa to 512 MPa and EL from 26.5% to 55.3% in
comparison with the as-cast HEA. It is suggested that the enhanced yield strength of the as annealed HEA was attributed to carbon interstitial solid
solution strengthening, grain refining and precipitation of tiny carbides, and the improvement of ductility was due to the elimination of cast defects and
twinning-induced plasticity. This work paved the way for the application of HEA as high performance structure materials.