异步累积叠轧超细孪晶铜织构取向的演变

• 作 者: 周蕾 史庆南 蔡晓兰 王军丽
• 机 构: 昆明理工大学冶金与能源工程学院,昆明理工大学材料科学与工程学院,昆明理工大学分析测试中心,
• 出 处: 材料热处理学报
• 发表日期: 2016年01期
• 关键词: 叠轧 孪晶 再结晶退火 异步叠轧 超细孪晶 再结晶过程 织构 电子衍射 背散射 退火孪晶

孪晶能够在保持铜材电导率基本不变的情况下提高铜材强度,异步叠轧制备出超细晶铜材,再结晶过程中形成大量超细孪晶,通过背散射电子衍射研究织构演变,异步叠轧变形后原料铜板中的退火孪晶织构组分{114}<221>消失,形成大量剪切织构{001}<110>和铜型织构{112}<111>组分,再结晶退火过程中,逐渐形成新的织构组分:{113}<141>、{125}<112>、{221}<114>,通过矩阵计算得出,其中{221}<114>组分实质上是异步叠轧形成的剪切织构再结晶退火时沿{111}面的镜面反映,而形成的孪晶取向。

The twins can increase the strength of the copper while keeping the electrical conductivity of the copper substantially unchanged. The ultrafine-grained copper material is prepared by the asynchronously-stacked rolling. A large amount of ultrafine twins are formed during the recrystallization. The backscattering electron diffraction {110} annealed twin crystal {114} <221> disappeared in the as-cast and as-rolled as-rolled alloy sheets to form a large amount of shear textures {001} <110> and Cu textures {112} (221} <141>, {125} <112>, {221} <114>, which are calculated by the matrix, in which {221} < 114> composition is essentially a mirror-surface reflection of the {111} plane during the recrystallization annealing of the shear texture formed by asyn- chronous roll-over, while the resulting twinned orientation.