General corrosion and stress corrosion cracking (SCC) susceptibility of an oxide dispersion strengthened (ODS) austenitic 310 (310-ODS) steel in supercritical water (SCW) are studied by weight gain and slow strain rate tensile (SSRT) testing, respectively. 310-ODS steel shows an excellent general corrosion resistance in SCW at 600 °C. Energy dispersive X-ray (EDX) and electron backscattered diffraction (EBSD) are conducted on the cross-section of the surface oxide film, revealing a double-layered structure. Results from SSRT tests at 600 °C show an intergranular fracture mode, and SCC susceptibility of 310-ODS steel increases with the increasing of dissolved oxygen (DO) concentration. SSRT tests at 650 °C show ductile fracture mode, and SCC susceptibility is minimum. ODS enhances the yield strength of 310-ODS steel to over 480 MPa, tensile strength to over 750 MPa, and still keeps elongation rate to over 12% at 600 °C. Combining with its low general corrosion rate and low SCC susceptibility, 310-ODS steel is supposed to be a promising material for the fuel cladding of supercritical water-cooled reactor (SCWR).

分别通过重量增加和慢应变速率拉伸（SSRT）试验研究了超临界水（SCW）中的氧化物弥散强化（ODS）奥氏体310（310-ODS）钢的一般腐蚀和应力腐蚀开裂（SCC）敏感性。310-ODS钢在600°C的SCW中表现出出色的耐一般腐蚀性能。在表面氧化膜的横截面上进行能量色散X射线（EDX）和电子背散射衍射（EBSD），显示出双层结构。在600°C下进行的SSRT测试结果显示出晶间断裂模式，并且310-ODS钢的SCC敏感性随溶解氧（DO）浓度的增加而增加。650°C下的SSRT测试显示出韧性断裂模式，SCC敏感性最小。ODS将310-ODS钢的屈服强度提高到480 MPa以上，抗拉强度超过750 MPa，并且在600°C时仍可将伸长率保持在12％以上。结合其低的一般腐蚀速率和低的SCC敏感性，310-ODS钢被认为是超临界水冷堆（SCWR）的燃料包壳的有前途的材料。