典型阻燃钛合金半固态锻造的力学特性

Mechanical Properties of Typical Fire Retardation Titanium Alloy After Semi-solid Forging

将典型Ti14合金在半固态进行了1次锻造成形,对锻造试样进行拉伸,研究其室温和高温的力学性能,并对拉伸断裂机理进行了分析。结果表明:不同的半固态温度和变形量对锻造试样的力学性能有明显的影响,随着温度和变形量的提高,强度增大,塑性降低,在1050℃和75%变形量时,合金强度最高;高温拉伸与室温拉伸表现出相同的趋势。随着温度的升高,拉伸断口由典型的穿晶断裂转变为沿晶断裂和穿晶断裂的混合断裂。

The mechanical properties of Ti14 alloy after semi-solid forging were studied. The room temperature tensile and high temperature tensile properties were analyzed. The results show that different semi-solid temperatures and deformation have significant effect on the mechanical properties of the sample. The strength increases and the plasticity reduces with increasing forging temperature and deformation ratio. The strength of the alloy is maximum at 1050℃ and 75% deformation ratio. The high temperature tensile properties exhibits same tendency as room temperature tensile. The tensile fracture changes from typical transcrystalline fracture to mix-fracture of transcrystalline fracture and intergranular fracture,with in creasing forging temperatwre.