【摘要】 采用光学显微镜（OM）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射仪（XRD）和拉伸试验,系统研究了不同热轧变形量对Al-Mg-Si-Zn合金的显微组织演变、织构演变和成形性能的影响。结果表明,通过调整热轧变形量（59%、74%和87%）可以获得不同尺寸和数量分布的Al（Fe,Mn）Si颗粒,这些颗粒分布的差异是影响固溶处理过程中再结晶形核和晶粒生长的主要因素。T4P处理后,热轧变形量为59%和74%的Al-Mg-Si-Zn合金板材中晶粒取向趋于随机分布,而热轧变形量为87%的板材中存在R{124}<211>、Cube_ND{100}<013>、Copper{112}<111>和Brass{011}<211>织构。热轧变形量为74%时获得的中等尺寸和数量的Al（Fe,Mn）Si颗粒在固溶处理后使板材中形成细小的晶粒和随机分布的织构,明显提高Al-Mg-Si-Zn合金的成形性能。更多还原

【Abstract】 The effects of Al（Fe,Mn）Si particles controlled by different hot-rolling deformations on the microstructure evolution,texture evolution,and formabilities of Al-Mg-Si-Zn alloy were systematically investigated using OM,SEM,TEM,XRD,and tensile tests.The results indicate that Al（Fe,Mn）Si particles with different size and number distribution characteristics can be obtained by adjusting the hot-rolling deformation degree（59%,74% and 87%）,and these differences in particle distribution are the main factors affecting the recrystallization nucleation and grain growth during solution treatment.After T4P treatment,the grain orientations in the Al-Mg-Si-Zn alloy sheets with 59% and 74%hot-rolling deformation tend to be randomly distributed.In comparison,the sheet with 87% hot-rolling deformation consists of R{124}（211）,Cube_ND{100}（013）,Copper{112}<111> and Brass{011}<211> texture components.The medium size and number of Al（Fe,Mn）Si particles obtained at 74% hot-rolling deformation cause fine grains and randomly distributed texture,which significantly improves the formability of Al-Mg-Si-Zn alloy.更多还原