The additive manufacture processing and machinability of CrMnFeCoNi high entropy alloy
The additive manufacture processing and machinability of CrMnFeCoNi high entropy alloy
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DOI：
10.1016/j.matdes.2020.109380
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发表时间：
2021-01
影响因子：
8.4
通讯作者：
P. Litwa;E. Hernández-Nava;Dikai Guan;R. Goodall;K. Wika
中科院分区：
文献类型：
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作者：
P. Litwa;E. Hernández-Nava;Dikai Guan;R. Goodall;K. Wika
我们报告的高熵合金，CrMnFeCoNi（康托合金）的加工特性的研究。粉末形式的合金首先用于通过选择性激光熔化增材制造相对较大的块。该模块提供了与参考AISI 304L不锈钢相比的加工响应的参数研究的材料，包括针对不同加工参数获得的表面光洁度和刀具磨损。发现CrMnFeCoNi合金实际上具有比AISI 304L不锈钢更好的机械加工性，并且来自机械加工表面的迹象表明这是由于该合金的塑性行为，具有良好但不过度的强度和显著的延展性。虽然这种行为可能不会在所有HEA中复制，但它表明在这类合金中可以找到具有良好机械加工性的合金，并且对机械加工性的早期评估可以帮助指导合金设计活动。
We report a study of the machining characteristics of a High Entropy Alloy, CrMnFeCoNi (Cantor's Alloy). The alloy in powder form is first used to Additively Manufacture a relatively large block by Selective Laser Melting. This block provides the material for a parametric study of the machining response in comparison to a reference AISI 304L stainless steel, both in terms of the surface finish obtained for different machining parameters, and the tool wear. It was found that the CrMnFeCoNi alloy has in fact better machinability than the AISI 304L stainless steel, and indications from the machined surface are that this is due to the plastic behaviour in this alloy, with good, but not excessive, strength, and significant ductility. While this behaviour may not be replicated in all HEAs, it shows that alloys with good machinability can be found in this class, and that early assessment of machinability can help guide alloy design activities.