激光粉末床熔融成形CoCrNi中熵合金的高温热腐蚀行为

周小包, 王子腾, 任延杰, 董少阳, 甘浪, 李聪

Hot Corrosion Behavior of CoCrNi Medium-entropy Alloys Fabricated by Laser Powder Bed Fusion

ZHOU Xiaobao, WANG Ziteng, REN Yanjie, DONG Shaoyang, GAN Lang, LI Cong

表1 LPBF和轧制CoCrNi MEA在高温盐膜腐蚀下的电化学阻抗谱拟合参数

Table 1 Fitting parameters for electrochemical impedance spectra of LPBF and rolled CoCrNi MEAs under high temperature salt film corrosion

Alloy Time Rs Y0, dl ndl Rdl Y0, d nd Y0, f nf Rf / h / Ω·cm2 / Ω-1·cm-2·s-n / Ω·cm2 / Ω-1·cm-2·s-n / Ω-1·cm-2·s-n / Ω·cm2 LPBF CoCrNi 3 0.969 0.620 0.611 7.864 - - 0.560 0.838 114.6 10 1.128 0.063 0.559 0.699 - - 0.268 0.609 167.3 24 1.142 0.075 0.527 0.722 - - 0.308 0.669 63.69 30 1.126 0.088 0.509 0.817 - - 0.326 0.689 64.28 48 1.185 0.106 0.479 0.979 - - 0.360 0.707 65.82 Rolled CoCrNi 3 1.059 0.237 0.800 3.467 - - 0.109 0.715 259.7 10 1.154 0.159 0.404 4.471 - - 0.098 0.723 244.1 24 1.190 0.155 0.409 8.789 - - 0.111 0.677 280.7 30 0.973 0.100 0.529 2.127 0.095 0.5601 - - - 48 0.998 0.080 0.514 0.8853 0.131 0.5054 - - -