【摘要】 利用电子背散射衍射（EBSD）和透射电子显微镜（TEM）研究了Al-10Mg及Al-10Mg-0.1Sc-0.1Zr合金在热压缩过程中的组织演变及动态再结晶机制。结果表明:同时添加Sc、Zr能够明显细化Al-10Mg合金的铸态晶粒,热处理后,Sc、Zr能够形成与α-Al基体共格的Al₃（Sc,Zr）相,这些沉淀相能够提高合金的热变形抗力;在变形过程中,Al₃（Sc,Zr）相能够钉扎位错运动、降低晶界及变形带处的位错密度,使位错在沉淀相周围聚集,因而改变了Al-10Mg合金内部位错增殖与湮灭的过程、进而使Al-10Mg合金动态再结晶方式由不连续动态再结晶（DDRX）转变为连续动态再结晶（CDRX）。更多还原

【Abstract】 The microstructure evolution and recrystallization mechanism of compressed Al-10 Mg alloy with and without addition of Sc and Zr have been investigated by electron back-scattered diffraction（EBSD） and transmission electron microscope（TEM）. Results show that original grain is refined through Al₃（Sc,Zr） precipitation. Also, flow stress can be increased. In the presence of Al₃（Sc,Zr） precipitation, dislocation motivation is impeded, concentration of dislocation is decreased in grain boundary and deformation band; accumulation and annihilation of dislocation is thus affected. Recrystallization grain is formed through rotation of subgrain in Al-10 Mg-Sc-Zr alloy. Afterwards, recrystallization mechanism of Al-10 Mg alloy is changed from discontinuous dynamic recrystallization（DDRX） into continuous dynamic recrystallization（CDRX）.更多还原