(重慶大學(xué) 材料科學(xué)與工程學(xué)院，重慶 400044)
摘 要: 研究軋制路徑對(duì)ZX21鎂合金板材織構(gòu)分布和屈服各向異性的影響。結(jié)果表明：?jiǎn)蜗蜍堉瓢宀男巫兛棙?gòu)為雙峰基面織構(gòu)，退火后呈現(xiàn)出垂直于冷軋方向分布的非基面雙峰的織構(gòu)特征。再結(jié)晶織構(gòu)的分布與晶粒的定向形核和選擇性長(zhǎng)大有關(guān)，多向軋制可弱化晶粒取向分布的方向性，其晶粒尺寸相比單向軋制有所減小，退火后形成均勻分布的圈狀織構(gòu)，大幅降低沿軋面各個(gè)方向拉伸時(shí)基面滑移的施密特因子差異，改善板面內(nèi)的力學(xué)性能各向異性，提高板材的成型性。
關(guān)鍵字: 鎂合金；軋制路徑；織構(gòu)；各向異性
（College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China）
Abstract:The influence of cold rolling path on texture and mechanical anisotropy in ZX21 alloy sheets was investigated. The results show that double peaks appear in the basal texture after unidirectional rolling, which subsequently change into off-basal texture with double peaks distributing perpendicular to the cold rolling path after annealing. The distribution of recrystallization texture is associated with the preferential nucleation and growth of recrystallized grains. The multi-directional rolling can weaken the preferential orientation of grains, whilst a circle-like texture distribution is obtained with the decrease of grain size after annealing. The yielding anisotropy is optimized by decreasing the difference of Schmid factor when tensioning along various directions and hence improves the mechanical property of sheets.
Key words: Mg alloy; rolling path; texture; anisotropy
