(上海交通大学 材料科学与工程学院，上海 200240)
摘 要: 通过异步和同步混合方式在室温下轧制TA2工业纯钛，获得的抗拉强度为960 MPa。轧制后材料的微观组织分析表明，经强烈塑性变形后材料仍然具有加工硬化的能力，能够通过变形强化进一步提高其强度。强度提高的主要原因是由于具有较高应变能的材料在进一步塑性变形时可能产生动态回复，从而改变其微观组织形貌。
关键字: 工业纯钛；强烈塑性变形；强度；加工硬化
commercial purity Ti rolled at room temperature
（School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China）
Abstract:TA2 commercial purity Ti (CP-Ti) was asymmetrically and symmetrically rolled at room temperature. An ultimate tensile strength of 960 MPa is obtained. The microstructures of the rolled materials were investigated. The results show that the CP-Ti processed by severe plastic deformation still has ability for work hardening and can be strengthened again. The main reason of such strengthening probably caused by the variation of the microstructures results from the dynamic recovery occurred during further plastic deformation.
Key words: commercial purity Ti; severe plastic deformation; strength; work hardening
