On-line heating rolling mill which could efficiently preheat sheet and apply tensile force on both ends of the sheet along rolling direction (RD) was used to investigate the effect of tension on mechanical behavior and shape quality of magnesium sheets. For revealing the influence mechanism, many analysis techniques including optical microscope, electron backscattered diffraction, macrotexture and transmission electron microscope were performed. The shape defect, edge wave, could be eliminated under higher tension along RD, which was attributed to more uniform distribution of microstructure and microstrain. Nevertheless, it is undesirable that the forward tensile force exceeds 3 kN in present work because the strength decreased for high recrystallization level when the tensile force is beyond this value. Furthermore, the main deformation mode was still slip during rolling process despite of accompanying twining, e.g., double twins, but more prismatic slip activated when tensile force exceeds 3 kN. The distribution of shear bands was affected by the applied tensile force that they appear as “V” shape along RD at a low forward or backward tensile force, while they appear as reticulate shape under applied tensile force of 5 kN.

在线加热轧机可以有效地预热板材并沿轧制方向（RD）在板材的两端施加拉力，用于研究张力对镁板材的机械性能和形状质量的影响。为了揭示影响机理，进行了许多分析技术，包括光学显微镜，电子背散射衍射，宏观纹理和透射电子显微镜。在较高的拉应力下可以消除形状缺陷，即边缘波，这归因于微观结构和微应变的更均匀分布。然而，在当前的工作中，向前的拉力超过3kN是不希望的，因为当拉力超过该值时，对于高的再结晶水平，强度降低了。此外，尽管伴随着孪晶，例如双孪晶，但主要的变形模式仍是轧制过程中的滑动，但是当拉力超过3 kN时，会激活更多的棱柱形滑动。剪切带的分布受到施加的拉力的影响，它们在较低的向前或向后拉力下沿RD呈“ V”形，而在5 kN的施加拉力下呈网状。