(北京科技大学 材料科学与工程学院，北京 100083)
摘 要: 选取TA2合金进行压缩来研究纯钛在热压缩过程中形变、再结晶与相变的交互作用规律，在不同的变形参数下进行热模拟压缩实验。实验发现，在热压缩之后的冷却过程中有明显的变体选择现象发生，在压应力作用下[0001]垂直于压缩方向的柱面织构组分会优先形成，因此会造成通过相变而产生的强柱面织构与变形α相所产生的强基面织构有明显的不同。研究表明，形成最小的弹性应变能是促使变体选择产生的主要原因。同时，对TA2纯钛在热变形过程中的再结晶规律和组织转变特征进行了研究。
关键字: 纯钛；热压缩；相变；织构；变体选择
（School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China）
Abstract:TA2 pure titanium was chosen to research the interaction among deformation, recrystallization and phase transformation during hot compression. The samples were hot compressed by thermal simulation method with different processing parameters. Variant selection induced by stress during cooling after compression was found. The prismatical texture component which featured that the [0001] direction perpendicular to the compressing direction produced preferentially under the compressing stress. As a result, the transformed α phase possesses strong prismatical texture which is different with the basal texture of compressed α phase. The minimum elastic strain energy is demonstrated to be the main reason that causes the variant selection. Dynamic recrystallization behavior and microstructure evolution during hot compression were also studied.
Key words: pure titanium; hot compression; phase transformation; texture; variant selection
