Effect of Mn on corrosion and thermal behaviour of AlCr1.5CuFeNi2Mnx high-entropy alloys

International Conference on Mechanical, Materials and Renewable Energy

机械制造;材料科学;能源学

Kukshal, V.^1 ; Patnaik, A.^2 ; Bhat, I.K.^3

Mechanical Engineering Department, NIT, Uttarakhand

246174, India^1

Mechanical Engineering Department, MNIT, Jaipur

302017, India^2

Applied Mechanics Department, MNNIT, Allahabad

211004, India^3

关键词: Corrosion property;    High entropy alloys;    High temperature;    Mechanical properties at high temperatures;    Multi-component alloy;    Polarization curves;    Thermal behaviours;    Vacuum induction furnaces;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/377/1/012023/pdf
DOI  :  10.1088/1757-899X/377/1/012023

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

There are numerous multicomponent alloys reported in the past resulting in a single phase with promising mechanical properties at high temperature. However, investigation on the corrosion properties and thermal conductivity of the novel high-entropy alloy (HEAs) are yet to be explored. The present study focuses on the effect of Mn on the corrosion and thermal behaviour of AlCr1.5CuFeNi2Mnx (x = 0, 0.25, 0.5, 0.75,1 in molar ratio) HEAs. The HEAs reported so far are mostly fabricated by arc melting process whereas, in this study, AlCr1.5CuFeNi2Mnx HEAs ingots were cast by high temperature vacuum induction furnace under inert gas environment. The electrochemical-corrosion behaviour of the as-cast alloys was studied using a potentiodynamic-polarization method immersed in 3.5 wt. %NaCl solution (open to air) at room temperature. It was observed from the polarization curve that the corrosion resistance was found to increase on the addition of higher amount of Mn in base alloy. The thermal conductivity of the HEAs was determined at 300 K, 350 K, 400 K, 450 K and 500 K. It was found that the thermal conductivity of the alloys decreases with the addition of the Mn content whereas the thermal conductivity is found to increase with the increase in the temperature of the alloys.