Based on electron beam powder bed fusion, a novel process, called selective evaporation, is introduced, which could fabricate FGMs from a single material powder by irradiating different electron beam energy onto different locations in the powder bed to evaporate varying magnitude of aluminum element from a raw Ti47Al2Cr2Nb powder. A three dimensional FGMs of the (α + β) titanium alloy, with the aluminum ratio less than 10%, encapsulated by the (α₂ + γ) TiAl alloy, with the aluminum ratio keeping 45%, were successfully produced by this process. A low energy multiple scan strategy was utilized to facilitate the irradiation of high energy to selected regions without inducing curling of the surface. The aluminum diffusion from the adjacent (α₂ + γ) phases was also considered and required a higher energy input to compensate the aluminum element restoring. The microstructure and micro-hardness of the FGM structure, which consists of (α + β)/(α₂ + α + β)/(α₂ + γ) phases, were investigated. Moreover, a customized pattern of the letters “TH” was created using the (α + β) titanium alloy in the (α₂ + γ) TiAl alloy to demonstrate the capability of this presented technique to fabricate complex FGM shapes.

基于电子束粉末床熔融，引入了一种称为选择性蒸发的新工艺，该方法可以通过将不同的电子束能量照射到粉末床中的不同位置，从而从单一材料粉末中制造FGM，从而从铝粉中蒸发出不同量的铝元素。 Ti47Al2Cr2Nb原料粉末。的（的三维功能梯度材料α  +  β）钛合金，与铝的比例小于10％，由（封装α ₂  +  γ通过该方法成功地生产了铝比率保持为45％的TiAl合金。利用低能量多次扫描策略来促进向选定区域照射高能量而不会引起表面卷曲。从相邻（铝扩散α ₂  +  γ）相的也被认为是与需要较高的能量输入到铝元素恢复补偿。的微观结构和FGM结构的显微硬度，它由（α  +  β）/（α ₂  +  α  +  β）/（α ₂  +  γ）阶段进行了调查。此外，字母“TH”的定制模式使用（已创建α  +  β在）钛合金（α ₂  +  γ）的TiAl合金以证明制造复杂形状的FGM此呈现的技术的能力。