(1. 宝鸡钛业股份有限公司，宝鸡 721014；2. 中国科学院 金属研究所，沈阳 110016)
摘 要: 研究退火态Ti2AlNb合金热轧板材在温度为940～980 ℃和初始应变速率为8.33×10−4~1×10−2 s−1时的超塑变形行为。结果表明：该合金具有良好的超塑性；在本实验范围内，其最高伸长率可达400%，最佳超塑条件为960 ℃和1.67×10−3 s−1，可用作超塑性成形工艺制作复杂构件。
关键字: Ti2AlNb合金；超塑性；显微组织；变形行为
（1. Baoji Titanium Industry Co., Ltd., Baoji 721014, China;
2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China）
Abstract:The superplastic behavior of annealed Ti2AlNb based alloy sheets was investigated at temperature range of 940−980 ℃ and initiate strain rate range of 8.33×10−4−1×10−2 s−1. The results show that the alloy exhibits good superplasticity. The maximum tensile elongation can reach up 400% at the temperature of 960 ℃ and the initiate strain rate of 1.67×10−3 s−1. Some complex parts will be formed by superplastic forming technology.
Key words: Ti2AlNb alloy; superplasticity; microstructure; deformation behavior
