Laser-induced topology optimized amorphous nanostructure and corrosion electrochemistry of supersonically deposited Ni_(30)Cr_(25)Al_(15)Co_(15)Mo_(5)Ti_(5)Y_(5) HEA coating based on AIMD

作     者：Xue Yan Cheng Zhang Yangshuai Li Youjian Yi Ziruo Cui Bingyuan Han Xue Yan;Cheng Zhang;Yangshuai Li;Youjian Yi;Ziruo Cui;Bingyuan Han

作者机构：State Key Laboratory of High Field Laser PhysicsShanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of Sciences(UCAS)Hangzhou 310024China National Laboratory on High Power Laser and PhysicsShanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Key Laboratory for Laser Plasmas(MOE)Collaborative Innovation Center of IFSA(CICIFSA)School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China School of Automotive and Traffic EngineeringJiangsu University of TechnologyChangzhou 213001China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第106卷第11期

页      面：257-269页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by a grant from the Natural Science Foundation of Jiangsu Province (Grant No.BK20191036) the Foundation of Research Project of China (Grant No.JCKY 61420051911) 

主　　题：Ultrasonic atomization spin method(UASM) Laser-induced topology optimized(LTO) Amorphous nanostructure High-entropy alloy(HEA) Ab-initio molecular dynamics(AIMD) 

摘      要：A novel Ni_(30)Cr_(25)Al_(15)Co_(15)Mo_(5)Ti_(5)Y_(5) high-entropy alloy(HEA)coating was irradiated to optimize its internal structure via laser after supersonic particle deposition(SPD).Owing to the high energy density of the laser and large temperature gradient,the crystallization process of the molecules and atoms in the coating was restrained and supercooling *** results showed that a considerable number of nano-crystal grains precipitated and amorphous structures were formed because of the random orientation of the *** baseline of differential scanning calorimetry scans obtained for the coating started to shift at the Tg of 939.37℃ and a step was *** dispersion peaks and lattice fringes indicated that the nucleation of the irradiated laser-induced topology optimized(LTO)coating was *** laser-induced topology optimizing treatment led to quasi-isotropy in the SPD ***,the LTO coating exhibited a residual stress of 18.4 MPa,stress-strain response,and fatigue limit of 265 ***,the LTO coating exhibited higher performance than the unirradiated SPD *** Nyquist and Bode electrochemical impedance spectra of the LTO coating,including two relaxation processes,indicated that the corrosion process steadily recovered to the equilibrium *** implies that the uniform oxidation passivation layer on the surface of the LTO coating insulated the material from the corrosive medium,protecting the substrate from further corrosion,thus enhancing the structural security of the material for use in super-intense laser facility applications.