节点文献
hcp结构TiZrHf中熵合金变形行为的准原位EBSD研究
Quasi-in-situ EBSD Study on the Deformation Behavior of TiZrHf Medium Entropy Alloys with hcp Structure
【摘要】 通过真空电弧炉熔炼和冷轧退火的方法成功制备了具有均匀等轴晶组织的TiZrHf中熵合金和纯Ti。X射线衍射(XRD)和电子背散射衍射(EBSD)实验证实TiZrHf合金与纯Ti都为单相hcp结构,轴比接近,且二者经冷轧退火后均表现出明显的基面织构。为了对比这2种轴比相似的hcp金属在塑性变形机制上的差异,使用扫描电镜(SEM)和EBSD技术对TiZrHf合金和纯Ti在单向拉伸过程中的微观组织和织构演化进行了准原位表征。滑移迹线分析结果表明,相比于纯Ti,TiZrHf合金中锥面滑移和{10■2}拉伸孪晶的活跃程度显著提高,而{11■2}压缩孪晶的活跃程度则相应降低。
【Abstract】 TiZrHf medium entropy alloy and pure Ti with uniform equiaxed grains were successfully prepared by vacuum arc furnace melting and annealing after cold rolling. X-ray diffraction(XRD) and electron backscatter diffraction(EBSD) results show that TiZrHf alloy and pure Ti are single-phase hcp structure with the close c/a ratio and basal texture after cold rolling and annealing. In order to compare the differences in plastic deformation mechanism between the two hcp metals, the microstructure and texture evolution during uniaxial tension were characterized by scanning electron microscope(SEM) and electron back scattered diffraction(EBSD). The results of slip trace analysis show that compared with pure Ti, the activities of pyramidal slip and {10■2} tension twins in TiZrHf alloy increase significantly while the activity of {11■2} compression twins decreases.
【Key words】 hcp medium entropy alloy; deformation mechanism; slip trace; texture; quasi-in-situ EBSD;
- 【文献出处】 稀有金属材料与工程 ,Rare Metal Materials and Engineering , 编辑部邮箱 ,2023年02期
- 【分类号】TG139
- 【下载频次】38