Corrosion and mechanical properties of hot-rolled 0.5%Gd-0.8%B-stainless steels in a simulated nuclear waste treatment solution
Corrosion and mechanical properties of hot-rolled 0.5%Gd-0.8%B-stainless steels in a simulated nuclear waste treatment solution
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DOI：
10.1016/j.net.2018.08.017
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发表时间：
2019-02
影响因子：
2.7
通讯作者：
M. Jung;Y. Baik;Y. Choi;D. Sohn
中科院分区：
文献类型：
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作者：
M. Jung;Y. Baik;Y. Choi;D. Sohn
在模拟核废料轧制处理条件下，研究了热轧0.5% Gd-0.8% b -不锈钢制造乏燃料贮存材料的腐蚀和力学行为。0.5% Gd-0.8% b不锈钢的奥氏体相和铁素体相的比值约为88:12。热轧试样的法向、横向和法向平均奥氏体和铁素体晶粒尺寸分别为5.08、8.94、19.35、23.29、26.00和18.11 [μ m]。铸态试样的平均显微硬度为200.4 Hv，而热轧试样在向RD、TD和ND方向的平均显微硬度分别为220.1、204.7和203.5 [Hv]。铸态和热轧试样的UTS、YS和伸长率分别为699、484 [MPa]、34.0%和654、432 [MPa]、33.3%。在模拟核废料溶液中观察了铸态和热轧试样的钝化性。铸态试样的腐蚀电位和腐蚀速率分别为−343 [mV SHE]和3.26× 10−7 [A/cm 2]，而正常至ND、RD和TD的热轧试样的腐蚀电位和腐蚀速率分别为−630、−512和−620 [mV SHE]和6.12× 10−7、1.04× 10−6和6.92× 10−7 [A/cm 2]。腐蚀倾向于优先发生在富Cr、富B区。
Corrosion and mechanical behavior of the hot-rolled 0.5% Gd-0.8% B-stainless steel to develop a spent nuclear fuel storage material was studied in a simulated nuclear waste treatment condition with rolling condition. The austenite and ferrite phases of the 0.5% Gd-0.8% B-stainless steels are about 88: 12. The average austenite and ferrite grain size of the plane normal to rolling, transverse and normal directions of the hot rolled specimens are about 5.08, 8.94, 19.35, 23.29, 26.00 and 18.11 [μ m], respectively. The average micro-hardness of the as-cast specimen is 200.4 Hv, whereas, that of the hot-rolled specimen are 220.1, 204.7 and 203.5 [H v] for the plane normal to RD, TD and ND, respectively. The UTS, YS and elongation of the as-cast and the hot-rolled specimen are 699, 484 [MPa], 34.0%, and 654, 432 [MPa] and 33.3%, respectively. The passivity was observed both for the as-cast and the hot rolled specimens in a simulated nuclear waste solution. The corrosion potential and corrosion rate of the as-casted specimens are− 343 [mV SHE] and 3.26× 10− 7 [A/cm 2], whereas, those of the hot rolled specimens with normal to ND, RD and TD are− 630,− 512 and− 620 [mV SHE] and 6.12× 10− 7, 1.04× 10− 6 and 6.92× 10− 7 [A/cm 2], respectively. Corrosion tends to occur preferentially Cr and B rich area.