Microstructure evolution during forging of high performance Ti aerospace components

本项目的目的是研究在Ti-6Al-4V热变形过程中α和β相的复杂相互作用，在小尺寸试样中，该试样仅由一个具有所需α和β取向的原始β晶粒组成。我的热压缩试验是专门设计的实验室规模的实验，补充了广泛的轧制试验，旨在降低与实际工业加工过程中大体积双相Ti64材料的多个加热和变形步骤相关的复杂性。这些实验提供了一次研究一种现象的机会，将变形与再结晶分开，并在任何操作之前知道菌落的起始取向，因为它在刚铸造之后的材料中。这种方法使我能够真实地跟踪在Ti64合金的织构的演变，并推导和建立在实际轧制过程中发生的顺序，导致最终产品中的织构的形成。

The aim of this project is to study complex interactions of alpha and beta phases during hot deformation of Ti-6Al-4V, in small dilatometer samples, which consist of only one prior-beta grain with desirable alpha and beta orientations. My hot compression tests are specifically designed lab-scale experiments, complementary for broad range of rolling trials that aim to lower down the complexity associated with multi heating and deformation steps of big volumes of dual phase Ti64 material during actual industrial processing. Those experiments provide the opportunity to study one phenomenon at a time i.e., to separate deformation from recrystallization and to know starting orientation of colonies before any operation as it is in the material just after casting. This approach allows me to authentically trace the evolution of texture in Ti64 alloy, and to deduce and establish the sequence of processes taking place in actual rolling which lead to formation of texture in the final products.