Cu单元素基合金表面FeCoCrAlCu激光高熵合金化涂层的制备

发布时间：2018-07-14 17:36

【摘要】：采用Nd:YAG激光辐照法在Cu单元素基合金表面制备FeCoCrAlCu高熵合金化涂层。利用扫描电镜、能谱仪、X射线衍射仪、显微硬度计及纳米压痕仪等研究FeCoCrAlCu激光高熵合金化层形成机制及性能。结果表明:采用优化的激光辐照工艺参数对等摩尔比的Fe、Co、Cr、Al四元合金粉末进行激光辐照合金化,可制备出含有基体主元Cu的FeCoCrAlCu高熵合金化涂层。合金化涂层由FCC+BCC简单结构固溶体组成,其显微组织主要以颗粒状组织为主,且与基体呈良好的冶金结合。Fe CoCrAlCu激光高熵合金化层的硬度是基体材料的7倍以上,其弹性模量、弹性比和同样深度承受的最大载荷远高于基体材料的,具有良好的强度和韧性。
[Abstract]:FeCoCrAlCu high entropy alloying coating was prepared on Cu single element base alloy by ND: YAG laser irradiation. The formation mechanism and properties of FeCoCrAlCu laser high entropy alloying layer were studied by means of scanning electron microscope, energy spectrometer, X-ray diffractometer, microhardness meter and nano indentation instrument. The results show that the FeCoCrAlCu high entropy alloying coating containing the principal component Cu of the substrate can be prepared by laser irradiation alloying of FeCoCrAlAl quaternary alloy powder with the same molar ratio of laser irradiation parameters. The alloying coating is composed of FCC BCC simple structure solid solution. The microstructure of alloying coating is mainly granular, and the hardness of laser high entropy alloying layer with good metallurgical bonding with substrate is more than 7 times of that of the substrate, and its elastic modulus is more than 7 times of that of the substrate. The elastic ratio and the maximum load of the same depth are much higher than those of the matrix material, and have good strength and toughness.
【作者单位】：沈阳工业大学材料科学与工程学院;沈阳鼓风机集团核电泵业有限公司;
【基金】：国家自然科学基金资助项目(51271126) 辽宁省自然科学基金资助项目(2013020101) 沈阳市科技局计划项目(F13-318-1-52,F13-070-2-00)
【分类号】：TG174.4

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