国内TC18钛合金本构关系研究进展

Research Progress on Constitutive Relation of TC18 Titanium Alloy in China

TC18钛合金具有高韧性,高强度,优良的塑性、淬透性等特点,在航空航天领域被广泛用做各种高承力构件,因此对其力学性能进行研究十分必要。本构关系是表征材料力学性能的最基本方法之一,为此,对TC18钛合金在准静态下的本构关系研究方法进行了综述,主要是通过热压缩实验(包括有限元仿真模拟)和应力松弛实验得到合金的力学性能数据并建立相应的准静态本构关系,并对各种研究方法的特点进行了比较分析。此外,参照具有相同结构类型的合金在动态下的本构关系研究方法,对TC18钛合金动态力学性能和本构关系研究的方向进行了展望。

TC18 titanium alloy has many characteristics such as high toughness, high strength, excellent plasticity, hardenability and etc. It is widely used in a variety of high bearing capacity components in aerospace field, so it is necessary to research its mechanical properties. The constitutive relation is one of the most basic characterization on the mechanical properties of the material. The research on the constitutive relation of TC18 titanium alloy was reviewed at quasi-static state in this paper. The main research method was to obtain the mechanical properties of the alloy and to establish the quasi-static constitutive relation of the alloy by hot compression experiments （ including finite element simulation） and stress relaxation experiments. Then characteristics of various research methods were compared and analyzed. The research direction of dynamic mechanical properties and constitutive relation of TC18 titanium alloy was prospected with the reference to the constitutive relation of the alloy with the same structure type in the dynamic.