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引用次数: 0
摘要
金属增材制造(AM)是一种独特的制造方法,通过逐层堆叠粉末材料来制造形状复杂、精度高的产品,从而实现对冶金微观结构的广泛控制。金属 AM 定义了具有特定凝固方向和快速冷却的凝固单元,从而实现了对由此产生的冶金微观结构的控制。然而,文献中缺乏对纹理控制和利用纹理微观结构的研究。本综述介绍了我们通过激光粉末床熔融(LPBF)控制晶体纹理的部分研究成果,重点关注:(1)粉末特性对致密化和晶体纹理形成的影响;(2)熔池形状和起始材料的晶体学特征对单晶形成和取向的影响;以及(3)合金设计在 LPBF 下考虑特定凝固场,成功应用于制备高功能类单晶纹理生物高熵合金。
Control of crystallographic textures by metal additive manufacturing-A review
Metal additive manufacturing (AM), a unique manufacturing method that stacks powder materials layer-by-layer to fabricate products with complex shapes and high precision, allows for a wide range of control over metallurgical microstructures. Metal AM defines solidification units with specific solidification directions and fast cooling, thereby enabling the control of the resulting metallurgical microstructure. However, the studies investigated texture control and utilizing textured microstructure are lacking in the literature. This review describes some of the results of our research on the control of crystallographic textures by laser powder bed fusion (LPBF), focusing on (1) the effect of powder properties on densification and crystallographic texture formation, (2) the effect of the melt pool shape and crystallographic characteristics of the starting material on the formation and orientation of single crystals, and (3) the successful application of alloy design to the preparation of highly functional single-crystalline-like textured biological high-entropy alloys considering specific solidification fields under LPBF.