Metal matrix composites with ternary intermetallic inclusions fabricated by laser direct energy deposition
Metal matrix composites with ternary intermetallic inclusions fabricated by laser direct energy deposition
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DOI：
10.1016/j.compstruct.2017.09.004
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发表时间：
2018
影响因子：
6.3
通讯作者：
Igor V. Shishkovsky;F. Missemer;I. Smurov
中科院分区：
文献类型：
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作者：
Igor V. Shishkovsky;F. Missemer;I. Smurov
本研究采用激光直接能量沉积（LDED）技术制备了不同含量、不同组织和不同性能的弥散增强镍基和钛基合金金属基复合材料（MMC）。我们已经确定，形成双重和三重增强MexAly（x，y = 1.0.3）金属间化合物结构与预设的参数的结晶度和空间分布可以执行in-situ，使用LDED期间的冷却和结晶的合金的相变。通过调节提供给LDED活性区的粉末混合物的组成，精确地获得了最终化学成分、结构和显微硬度的预设梯度。我们提出了一种LDED的组合方法，该方法可以成为用于增材制造领域的新MMC和合金的搜索和开发的有效工具，以及用于研究激光合成的非平衡条件下的结构和相形成。
At the present research, we obtained the metal matrix composites (MMC) of dispersion-reinforced nickel and titanium based alloys with variable content, structure and properties using laser direct energy deposition (LDED). We have ascertained that forming double and triple reinforced MexAly (x, y = 1.0.3) intermetallic structures with preset parameters of dispersibility and spatial distribution can be performedin-situ, using the LDED during the phase transformations of cooling and crystallization of the alloy. The preset gradients of final chemical composition, structure and microhardness have been obtained precisely by regulating the composition of the powder mixture supplied to the active zone of the LDED. We suggest a combination method of the LDED which can be an effective instrument for search and development of the new MMC and alloys for the additive manufacture field, as well as for studying structure- and phase-formation in the nonequilibrium conditions of laser synthesis.