高压条件下钛合金材料组织演变及力学性能研究

Study on microstructure evolution and mechanical properties of titanium alloy under high pressure

钛合金的组织演变,对于高性能轻量化复杂设备的整体精密性,有极大的影响,直接威胁设备的使用安全,因此研究高压条件下,钛合金材料组织演变及力学性能。此次研究预先分析了原始态组织、退火态组织钛合金材料的基本特征,实现对钛合金金相状态的提取;根据疲劳裂纹扩展速率模型,计算钛合金材料组织疲劳裂纹扩展状态下的演变速率;利用四组高温环境模拟高压条件,测试高压条件下,钛合金的硬度和冲击韧性力学性能,实现对钛合金材料的演变与性能分析。

The microstructure evolution of titanium alloy has great influence on the overall precision of high performance lightweight complex equipment and directly threatens the safety of the equipment.Therefore,the microstructure evolution and mechanical properties of titanium alloy materials under high pressure are studied.Based on the fatigue crack growth rate model,the evolution rate of titanium alloy microstructure under fatigue crack growth was calculated,and the hardness and impact toughness properties of titanium alloy under high pressure were tested under four groups of high temperature environment Evolution and performance analysis of materials.