摘要
采用WK-Ⅱ型非自耗真空电弧熔炼炉制备FeCr_(x)NiMnCu_(0.5)(x=0.75、1.00、1.25)高熵合金,研究了Cr含量对高熵合金的组织结构、力学性能及腐蚀性能的影响。结果表明,该体系高熵合金铸态组织为树枝晶,随着Cr含量增加,合金由单一的FCC相转变为FCC和BCC混合物相,硬度和压缩屈服强度不断增大,FeCr_(1.25)NiMnCu_(0.5)合金的显微硬度(HV_(0.5))、压缩屈服强度和抗压强度分别达到249.5、963.2 MPa、1214.3 MPa。在1 mol/L的H_(2)SO_(4)溶液中,FeCr_(0.75)NiMnCu_(0.5)高熵合金的自腐蚀电位为-0.232 V,腐蚀电流密度为2.600×10^(-6)A/cm^(2),表明其耐腐蚀性能较好。
FeCr_(x)NiMnCu_(0.5)(x=0.75,1.00,1.25)high entropy alloy was prepared by WK-Ⅱ non-consumptive vacuum arc melting furnace.The effects of Cr content on the microstructure,mechanical properties and corrosion properties of FeCr_(x)NiMnCu_(0.5) high entropy alloy were investigated.The results indicate that the as-cast structure of high entropy alloy is dendritic,and the alloy is transformed from single FCC phase to mixture of FCC and BCC phase with Cr content increase,where the hardness and compressive yield strength of the alloy are increased continuously.The microhardness,compressive yield strength and compressive strength of FeCr_(1.25)NiMnCu_(0.5) alloy reach 249.5 HV_(0.5),963.2 MPa and 1214.3 MPa,respectively.In 1mol/L H_(2)SO_(4) solution,the self-corrosion potential of FeCr_(0.75)NiMnCu_(0.5) alloy is the most positive,which is -0.232 V,and the corrosion current density is the least,which is 2.600×10^(-6)A/cm^(2),indicating the desirable corrosion resistance.
作者
王晓军
周旭
王强
迟志康
Wang Xiaojun;Zhou Xu;Wang Qiang;Chi Zhikang(College of Materials Science and Engineering,Lanzhou University of Science and Technology;State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Science and Technology)
出处
《特种铸造及有色合金》
CAS
北大核心
2023年第8期1089-1094,共6页
Special Casting & Nonferrous Alloys
