Study of the elaboration of high entropy material from powder by laser additive manufacturing
Study of the elaboration of high entropy material from powder by laser additive manufacturing
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激光增材制造粉末高熵材料的研究
DOI：
10.1016/j.procir.2020.09.051
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
H. Maskrot
中科院分区：
文献类型：
--
作者：
G. Huser;I. Demirci;P. Aubry;I. Guillot;L. Perrière;E. Rigal;H. Maskrot
如果Stellite® 6是一种钴基合金，其硬质涂层以其良好的耐磨性而闻名，则其不适合用于核设施，因为在中子通量下钴的活化使得维护在后期退役时更加微妙。虽然有几项研究提出了某些不含钴的硬质涂层，但目前还没有一种涂层的耐磨性能能与Stellite® 6相媲美。本研究旨在探索高熵合金或浓缩成分合金（HEA/CCA）的最新研究领域，作为创新硬质涂层开发的新途径。该研究是基于使用热力学模拟与CALPHAD，以预测大量的合金的组成，在初步选择的可接受的元素（NiFeCrMoTi在这项研究中）。然后，激光金属沉积（LMD）用于制造梯度成分的壁，用于快速筛选成分和涂层，用于随后的磨损测试。对精心制作的样品进行冶金分析，选择最有希望的样品，最后进行销盘磨损试验。磨损试验证明了所选HEA/CCA的良好性能。
If Stellite® 6 is a cobalt base alloy with a hard coating well known for its good wear resistance, its use is not desirable for nuclear installations due to the activation of cobalt under neutron flux which makes maintenances more delicate as, later, decommissioning. If several studies have led to propose certain hard coatings without cobalt, for the moment, none equals the wear properties of Stellite® 6.The present research aims to explore the recent research area on high entropy alloys or concentrated composition alloys (HEA/CCA) as a new path for the development of innovative hard coatings. The study is based on the use of thermodynamics simulations with CALPHAD in order to predict the compositions of a large number of alloys, after an initial selection of the acceptable elements (NiFeCrMoTi in this study). Then, Laser Metal Deposition (LMD) is used for manufacture walls of graded compositions for a rapid screening of compositions and coatings for later wear tests. The metallurgical analyses of the elaborated samples allow selecting the most promising ones on which wear pin-on-disk tests are finally conducted. The wear tests have evidenced promising behavior for the selected HEA/CCAs.