The structural, microstructural and elastic properties of Ti and Ti-6Al-4V at high-pressures and high-temperatures

Titanium (Ti) and the alloy Ti-6Al-4V (Ti64) possess material properties of great value to the aerospace industry, such as a superior strength to weight ratio,
resistance to corrosion and fracture toughness. Ti alloys are compatible with composite materials, possessing a similar thermal expansion. There is therefore
a global effort to utilise additively manufactured (AM) Ti64 in aircraft. However, there is a lack of high quality equation of state (EoS) and strength data for Ti
and Ti64. There is no data at all on AM Ti64. Without adequate data to improve models, it is not possible to reduce design uncertainties and optimise aircraft
performance. We propose to address this deficiency by studying the structural, microstructural and elastic properties of commercial Ti and commercial and AM
Ti64 up to 35 GPa and 1500 K at ID06 LVP by simultaneously collecting X-ray diffraction patterns, X-ray images, and pulse-echo ultrasonic data.

钛（Ti）及其合金Ti-6Al-4V（Ti64）具备对航空航天工业极具价值的材料特性，例如卓越的强度重量比、耐腐蚀性及断裂韧性。钛合金与复合材料相容性良好，二者热膨胀系数相近。因此，全球范围内正致力于在航空器中应用增材制造（additively manufactured, AM）Ti64。然而，目前缺乏针对钛及Ti64的高质量状态方程（equation of state, EoS）与强度数据。关于增材制造Ti64的数据更是完全空白。若缺乏充足数据以改进模型，则无法降低设计不确定性并优化航空器性能。我们提议通过在ID06 LVP装置上同步采集X射线衍射图谱、X射线图像及脉冲回波超声数据，研究商用钛、商用Ti64及增材制造Ti64在高达35 GPa压力与1500 K温度下的结构、微观结构及弹性特性，以弥补这一数据缺口。