Wang Mingsai, Wang Yanfei, Huang Aihui, Gao Lei, Li Yusheng, Huang Chongxiang
School of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, China.
Nano Structural Materials Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
Materials (Basel). 2018 Nov 13;11(11):2261. doi: 10.3390/ma11112261.
The effect of the grain refinement and texture on tensile and fatigue properties in commercially pure titanium (grade 2) processed by rotary swaging (RS) and an annealing treatment is investigated. The as-processed sample consists of band-like grains on the longitudinal section and equiaxed grains on the transversal section and revealed an obvious <10-10> fiber texture with respect to the rod axis. Through this technique, a sample with a high tensile strength of 870 MPa, a high uniform elongation of 8.5%, and a high fatigue limit of 490 MPa can be achieved, and the tensile and fatigue properties are almost the same as those of a conventional Ti-6Al-4V alloy. The enhanced mechanical properties and plastic deformation mechanism are discussed in terms of the observed ultrafine-grained microstructure and strong fiber texture.
研究了旋转锻造（RS）和退火处理对工业纯钛（2级）晶粒细化和织构对拉伸及疲劳性能的影响。加工后的样品纵向截面由带状晶粒组成，横向截面由等轴晶粒组成，相对于棒材轴线呈现明显的<10-10>纤维织构。通过该技术，可获得抗拉强度为870MPa、均匀伸长率为8.5%、疲劳极限为490MPa的样品，其拉伸和疲劳性能与传统Ti-6Al-4V合金几乎相同。根据观察到的超细晶粒微观结构和强纤维织构，讨论了增强的力学性能和塑性变形机制。
