Experimental study on microstructural and corrosion behaviors of friction stir processed steel with CoCrFeCuTi HEA reinforcement and effect of annealing  

作　　者：S.Aravind KRISHNA N.RADHIKA Alokesh PRAMANIK N.JEYAPRAKASH 

机构地区：[1]Department of Mechanical Engineering,Amrita School of Engineering,Amrita Vishwa Vidyapeetham,Coimbatore 641112,India [2]School of Civil and Mechanical Engineering,Curtin University,Bentley WA 6102,Australia [3]School of Mechanical and Electrical Engineering,China University of Mining and Technology,Xuzhou 221116,China

出　　处：《Science China(Technological Sciences)》2025年第1期229-246,共18页中国科学(技术科学英文版)

摘　　要：The ability to perform against extreme corrosion environments in stainless steel depreciates under challenging conditions in industrial applications.This can be resolved by employing surface modification techniques to modify the surface with the required characteristics.The present study investigates the outcomes of friction stir processing of SS304 with CoCrFeCuTi high entropy alloy(HEA)as reinforcement and the property enhancements post-annealing.The synthesized CoCrFeCuTi HEA exhibited irregular fragments with 17μm mean particle size and body centred cubic(BCC)phase.The microstructure of the processed surface revealed ultra-refined grains with a uniform distribution of HEA filler.The microstructures of the samples annealed at 400℃,550℃,700℃and 850℃for 2 h also showed significant grain growth and grain refinements.The processed sample with HEA reinforcement annealed at 700℃exhibited enhanced microhardness and tensile strength by 63%and 0.88 times than that of the processed sample with HEA pre-annealing.The subsequent electrochemical corrosion test displayed better corrosion resistance for the HEA-processed and annealed sample.Hot corrosion tests at 900℃showcased excellent resistance for the HEA processed and annealed samples by 14.92%,12.75%,and 14.83%against the samples pre-annealed under three different salt mixtures,and the corroded surface was analyzed.

关 键 词：high entropy alloys friction stir processing ANNEALING grain refinement corrosion resistance 

分 类 号：TG172[金属学及工艺—金属表面处理] TG156.2[金属学及工艺—金属学] TG142.1[一般工业技术—材料科学与工程]