通过单向多道次弯曲(RUB)工艺及随后的退火处理来改变镁合金的显微组织和织构,研究显微组织和织构对其成形性能的影响。RUB工艺和不同温度下的退火处理对显微组织有两方面的影响:粗化晶粒和削弱织构。经RUB处理并在300°C退火的板材表现出最好的成形性能。这主要归因于(0002)基面织构强度的削弱,而织构的削弱导致了较低的屈服强度、较大的断裂伸长率、较小的Lankford值(r值)和较大的加工硬化指数(n值)。与原始板材相比,经RUB处理并在400°C退火而产生的具有粗大晶粒的板材具有较低的拉伸性能,但却表现出较高的成形性能。这主要是由于粗大晶粒增强了变形孪晶,而变形孪晶可以协调厚向应变。 The microstructure and texture of magnesium alloy were changed by one-way multi-pass bending (RUB) process and subsequent annealing treatment to study the effect of microstructure and texture on its formability. The RUB process and annealing at different temperatures have two effects on the microstructure: coarsening of the grains and weakening of the texture. The RUB treated and annealed at 300 ° C showed the best formability. This is mainly attributed to the weakened texture strength of the (0002) base and the weakened texture leads to lower yield strength, larger elongation at break, smaller Lankford values ​​(r), and larger Work hardening index (n value). Panels with coarse grains produced by RUB treatment and annealing at 400 ° C have lower tensile properties compared to the original sheet but exhibit higher formability. This is mainly due to the fact that the coarse grains enhance the deformation twins, while the deformation twins can coordinate the thick strains.