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The prospects for additive manufacturing of bulk TiAl alloy

机译：TiAl块状合金增材制造的前景

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This paper deals with the prospects for additive manufacturing (AM) of bulk TiAl alloys. A number of AM processes have already been explored in the literature for these intermetallic alloys. The main trend developed in published works concerns a strong crack sensitivity of this relatively brittle material due to rapid successive heating and cooling cycles. Optimised processing conditions have already been achieved for producing sound and crack-free TiAl materials by means of EBM and laser metal deposition processes. This experimental work was particularly focused on the third process, i.e. selective laser melting, to produce fully dense TiAl parts. A series of beads, surface layers and cubes have been manufactured to investigate the microstructural evolution. Post-heat treatments allowed a uniform microstructure to be restored for the intermetallic TiAl alloy.
机译：本文探讨了块状TiAl合金的增材制造（AM）的前景。在文献中已经针对这些金属间合金探索了许多增材制造工艺。由于快速连续的加热和冷却循环，已发表的作品中出现的主要趋势涉及这种较脆的材料对裂纹的敏感性强。通过EBM和激光金属沉积工艺，已经获得了优化的加工条件，可以生产出良好且无裂纹的TiAl材料。该实验工作特别集中于第三种工艺，即选择性激光熔化，以生产出完全致密的TiAl零件。制造了一系列的珠子，表面层和立方体，以研究微观结构的演变。后热处理可使金属间TiAl合金恢复均匀的微观结构。

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