The present work is focused on the study and evaluation of the mechanical properties of the new low-nickel 2001 lean–duplex stainless steel (LDSS), 2205 duplex stainless steel (DSS) and B500SD carbon steel rebars, influenced by aggressive corrosion environment. Test specimens were loaded to 85% of the yield strength while simultaneously exposed to 8 wt% Cl⁻ concrete pore solution for 315 days. Subsequently, the specimens were loaded until failure at a high deformation rate of 0.41 mm/s. The analysis of the stress‒strain curve showed a reduction of the ultimate tensile strength greater than 35% for the B500SD, while the 2001 LDSS and 2205 DSS show a reduction lower than 20% and 10%, respectively. Analyzing elongation to failure, neither 2001 LDSS nor 2205 DSS show evidence of stress corrosion under the simultaneous action of chlorides and load. The toughness change in the 2205 DSS is negligible, the 2001 LDSS slightly reduces its resilience, and the B500SD severely decreases both properties. The fractography study revealed that 2001 LDSS and 2205 DSS show a dimple pattern with features of ductile fracture by coalescence of microvoids.

目前的工作集中在研究和评估新型的低镍2001瘦双相不锈钢（LDSS），2205双相不锈钢（DSS）和B500SD碳素钢钢筋的机械性能，这些钢性能受到腐蚀环境的影响。试验样品加载到屈服强度的85％，而同时暴露于8重量％的Cl ^-混凝土孔隙溶液处理315天。随后，以0.41 mm / s的高变形速率加载样品直至失效。应力应变曲线分析表明，B500SD的极限抗拉强度降低幅度大于35％，而2001 LDSS和2205 DSS的降低幅度分别低于20％和10％。分析断裂伸长率，2001 LDSS和2205 DSS均未显示出在氯化物和载荷同时作用下的应力腐蚀迹象。2205 DSS的韧性变化可忽略不计，2001 LDSS的弹性略有降低，而B500SD则严重降低了这两种性能。断口研究表明，2001 LDSS和2205 DSS显示出具有通过微孔的聚结而产生韧性断裂的凹痕图案。