Interactions between slip bands (SBs) and interfaces in a compressed duplex stainless steel (DSS) are investigated regarding the roles of grain boundaries (GBs) and phase boundaries (PBs) in plastic deformation. Digital image correlation based on scanning electron microscopy, and electron backscatter diffraction are utilized to characterize SBs in ferrite and austenite phases, and the interactions between interfaces and SBs: slip transmission, slip blockage and non-intersection. Most ferrite SBs have lower local strains than austenite SBs, and exhibit weak interactions with interfaces. For austenite GBs and PBs, the strain gradient across interfaces with slip transmission is much lower than that across interfaces with slip blockage. Moreover, GBs/PBs following the twin/Kurdjumov–Sachs relationship exhibit a higher probablity of slip transmission, but a considerably lower probability of slip blockage, compared to general GBs/PBs. This is attributed to the different geometries of slip systems for different types of interfaces. Therefore, twin GBs and PBs following the Kurdjumov–Sachs relationship play a lesser role in restraining plastic flow and promoting the strength of DSS than general GBs and PBs. In addition, the effect of loading orientation is minor for the SB-GB interactions, but pronounced for SB-PB interactions.

研究了滑移带（SBs）与压缩双相不锈钢（DSS）中的界面之间的相互作用，研究了晶界（GBs）和相界（PBs）在塑性变形中的作用。利用基于扫描电子显微镜和电子反向散射衍射的数字图像相关性来表征铁素体和奥氏体相中的SB，以及界面与SB之间的相互作用：滑动传输，滑动阻塞和不相交。大多数铁素体SB的局部应变低于奥氏体SB，并且与界面的相互作用较弱。对于奥氏体GB和PB，具有滑动传递的界面上的应变梯度远低于具有滑动阻挡的界面上的应变梯度。此外，遵循Twin / Kurdjumov-Sachs关系的GBs / PBs表现出更高的滑动传递概率，但与一般的GB / PB相比，滑倒阻塞的可能性要低得多。这归因于针对不同类型接口的滑动系统的不同几何形状。因此，遵循库尔德朱莫夫-萨克斯（Kurdjumov-Sachs）关系的孪生GB和PB在抑制塑性流动和增强DSS强度方面的作用要比普通GB和PB小。此外，加载方向的影响对于SB-GB相互作用较小，但对于SB-PB相互作用则明显。