Coating and prototyping of single-phase iron aluminide by laser cladding
Coating and prototyping of single-phase iron aluminide by laser cladding
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DOI：
10.1016/j.surfcoat.2013.09.001
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发表时间：
2013-11-25
影响因子：
5.4
通讯作者：
Muecklich, Frank
中科院分区：
文献类型：
--
作者：
Bax, Benjamin;Schaefer, Michael;Muecklich, Frank
使用 500 W 二极管激光器和同轴粉末喷嘴进行铁和铝粉末混合物的激光熔覆。采用低碳钢、纯镍和铝合金作为基材。通过扫描电子显微镜、能量色散X射线光谱和X射线衍射对结果进行了研究。可以在钢上实现完全无裂纹的单相 Fe3Al 涂层。镍上的涂层由 FeAl 组成。尽管激光熔覆过程中通常发生高冷却速率，但涂层内的晶粒相当粗。另一方面，铝上的激光熔覆会导致裂纹。此外，这项工作还表明，可以通过原位激光熔覆制作 3D 铝化铁结构原型。 (C) 2013 Elsevier B.V. 保留所有权利。
Laser cladding with powder blends of iron and aluminium was performed using a 500-W diode laser and a coaxial powder nozzle. Mild steel, pure nickel and aluminium alloy were used as substrate materials. The results were investigated by scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffraction. Completely crack-free, single-phase Fe3Al coatings could be achieved on steel. The coating on nickel consisted of FeAl. Despite the high cooling rates, which normally occur during laser cladding, the grains within the coatings were rather coarse. Laser cladding on aluminium, on the other hand, led to cracking. Furthermore, it could be shown in this work that it is possible to prototype 3-D iron aluminide structures by in situ laser cladding. (C) 2013 Elsevier B.V. All rights reserved.