Mechanical and Microstructural Investigation of Nickel-Based Superalloy IN718 Manufactured by Selective Laser Melting (SLM)
Mechanical and Microstructural Investigation of Nickel-Based Superalloy IN718 Manufactured by Selective Laser Melting (SLM)
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DOI：
10.1002/adem.201500158
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发表时间：
2015-08-01
影响因子：
3.6
通讯作者：
Glatzel, Uwe
中科院分区：
文献类型：
--
作者：
Stroessner, Johannes;Terock, Michael;Glatzel, Uwe
选择性激光熔化是一种全新的金属分层制造工艺，用于加工镍基高温合金IN718。这项工作的目的是比较的微观结构和所生产的标本的机械性能，直接后的制造过程中，另外后两个不同的热处理后的制造过程。由于通过选择性激光熔化制造的试样的所得微观结构和性能是定向的，因此所有调查都是针对垂直和水平定向的试样进行的。光学，扫描和透射电子显微镜进行，以明确的微观结构的特征。为了研究材料的纹理，进行额外的EBSD测量。机械测试包括室温和高温下的拉伸测试和硬度测量。调查显示，SLM生产的标本质量非常好。然而，可以发现晶粒尺寸、取向，特别是沉淀行为的差异。
Selective laser melting, a quite new layer-wise manufacturing process for metals, is used for processing the nickel-based superalloy IN718. The objective of this work is to compare the microstructure and the mechanical properties of the produced specimens, directly after the manufacturing process and additionally after two diverse heat treatments subsequent to the manufacturing process. As the resulting microstructure and properties for specimens manufactured by selective laser melting are directional, all investigations are made for specimens oriented vertically and horizontally. Optical, scanning, and transmission electron microscopy are carried out in order to characterize the microstructure explicitly. For investigating the texture of the material, additional EBSD measurements are undertaken. Mechanical tests include tensile testing at room temperature and at elevated temperatures and hardness measurements. The investigations reveal a very good quality of the SLM-produced specimens. Nonetheless, differences in the grain sizes, the orientation, and especially in the precipitation behavior could be found.