چکیده مقاله
AlCoCrFeNi based high entropy alloy coatings were deposited on low carbon steel substrates using gas tungsten arc welding process in different heat inputs two amperages of 180 and 210 A and effects of heat input on the deposit microstructure was studied The microstructural details were investigated by Optical Microscopy OM , Field Emission Scanning Microscopy FE SEM and X ray Diffraction XRD analysis and microhardness testing The result showed that the coating with the lowest heat input has petal dendritic morphology which includes two B2 and A2 face centered cubic structures and a Cr rich strip like structure in some parts of grain boundaries By Increasing heat input a new Co Cr rich phase appears besides the A2 and B2 phases The morphology and amount of this phase are different in every area of the coating The variations in microstructure and morphologies of the involved phases were explained based on the temperature gradient to growth rate ratio G/R and amount of the iron content In all the coatings, the average hardness was higher than 500 HV Changes in heat input de not produce meaningful changes in the coating hardness
کلیدواژهها
نویسندگان
Nima Abbasian Vardin
MSc student, Sahand University of Technology, Iran
Tohid Saeid
Professor, Sahand University of Technology, Iran
Alireza Akbari
Professor, Sahand University of Technology, Iran
شیوه ارجاع
Abbasian Vardin, Nima and Saeid, Tohid and Akbari, Alireza,1400,Effect of heat input on the microstructure of AlCoCrFeNi high entropy alloy coating deposited using gas tungsten arc welding,4th International Conference on Welding and Non Destructive Testing & 22nd National Conference on Welding & Inspection & 11th National Conference on NDT,Isfahan
ارائهشده در
مجموعه مقالات چهارمین کنفرانس بین المللی جوشکاری و آزمایش های غیرمخرب و بیست و دومین کنفرانس ملی جوش و بازرسی و یازدهمین کنفرانس ملی آزمایش های غیرمخرب18 اسفند 1400 · اصفهان