(北京航空材料研究院，北京 100095)
摘 要: 通过热处理得到3种强度级别的Ti-1023合金材料。拉伸和疲劳试验结果表明，在时效温度为510~560 ℃的范围内，Ti-1023合金的轴向拉压疲劳极限随屈服强度的提高而提高。拉伸断口分析表明，高强度Ti-1023的断裂模式为沿晶断裂，在较低强度Ti-1023断裂模式以韧性断裂为主的韧性和沿晶断裂的混合断裂模式。疲劳断口分析则表明，在较低载荷时，时效温度对断口疲劳区域的影响较小。
关键字: 钛合金；Ti-1023合金；拉伸性能；疲劳性能
Ti-1023 titanium alloys
（Institute of Aeronautical Materials, Beijing 100095, China）
Abstract:The Ti-1023 alloys with three levels of strengths were achieved through heat treatment. The analysis of tensile and axial tension-compression fatigue test shows that the fatigue limits raise with raising yield strength between 510 ℃ and 560 ℃ aging temperatures. The tensile fracture analysis indicates that it will be intergranular rupture pattern with high strength, and will transfer to mixed fracture pattern with mainly ductile rupture and a small amount of intergranular rupture. Aging temperature has little effect on fatigue area of fracture face under lower load.
Key words: titanium alloy; Ti-1023 alloy; tensile properties; fatigue property
