| 等离子体控制优化激光烧结Ni30Cr25Al15Co15Mo5Ti5Y5高熵合金涂层的显微组织与性能(英文) |
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| 引用本文： | 颜雪,徐健晏,管相合,韩冰源,张诚,崔自若,梁文萍.等离子体控制优化激光烧结Ni30Cr25Al15Co15Mo5Ti5Y5高熵合金涂层的显微组织与性能(英文)[J].中国有色金属学会会刊,2023,33(1):168-188. |
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| 作者姓名： | 颜雪 徐健晏 管相合 韩冰源 张诚 崔自若 梁文萍 |
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| 作者单位： | 1. 中国科学院上海光学精密机械研究所强场激光物理国家重点实验室;2. 南京航空航天大学材料科学与技术学院;3. 中国工程物理研究院上海激光等离子体研究所;4. 江苏理工学院汽车与交通工程学院;5. 上海交通大学物理与天文学院IFSA协同创新中心(CICIFSA)激光等离子体教育部重点实验室 |
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| 基金项目： | supported by the Natural Science Foundation of Jiangsu Province, China (No. BK20191036)； |
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| 摘 要： | 提出一种激光诱导等离子体的主动抑制方法，以优化Ni30Cr25Al15Co15Mo5Ti5Y5高熵合金(HEA)涂层表面激光烧结(SLS)的晶体结构和摩擦学性能，该过程采用脉冲激光和不同保护气体。结果表明，无保护气体或He气氛下的电子温度(Te)和等离子体射流体积均高于Ar-He气氛下的。SLS过程中发生明显的相变和金属原子扩散，α-AlFe3、α-AlNi和γ-AlFe2Ni化合物沉淀形成冶金结合。等离子体通过逆韧致辐射(IB)吸收较低能量加强激光与HEA之间的相互作用，使涂层显微硬度增加，动态摩擦因数降低，这说明等离子体控制对激光增材制造存在重要影响。
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| 关 键 词： | 激光诱导等离子体 表面激光烧结 电子温度 逆韧致辐射吸收 高熵合金 残余应力 |
| 收稿时间： | 15 October 2021 |
Optimization of microstructure and properties of laser sintered Ni30Cr25Al15Co15Mo5Ti5Y5 high-entropy alloy coatings via controlling plasma |
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| Affiliation: | 1. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;2. Department of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;3. Shanghai Institute of Laser Plasma, China Academy of Engineering Physics (CAEP), Shanghai 201800, China;4. School of Automotive and Traffic Engineering, Jiangsu University of Technology, Changzhou 213001, China;5. Key Laboratory for Laser Plasmas (MOE), Collaborative Innovation Center of IFSA (CICIFSA), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China |
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| Abstract: | An active suppressing method of laser-induced plasma was proposed to optimize the crystal structure and tribological properties for the surface laser sintering (SLS) of Ni30Cr25Al15Co15Mo5Ti5Y5 high-entropy alloy (HEA) coatings using a pulsed laser with various shielding gases. The results indicate that electron temperature (Te) and the plasma jet volume with no shielding gas or in He atmosphere were higher than those in Ar?He atmosphere. Well- defined phase transitions and significant metal atom diffusion occurred in SLS, and metallurgical bonding occurred with the precipitation of α-AlFe3, α-AlNi, and γ-AlFe2Ni. The lower energy absorbed by the plasma via inverse bremsstrahlung (IB) strengthened interactions between laser and HEA, increasing the microhardness, and reducing the dynamic friction coefficient. This elucidates the crucial influence of plasma control on laser-based additive manufacturing. |
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| Keywords: | laser-induced plasma surface laser sintering (SLS) inverse bremsstrahlung absorption (IB) high-entropy alloy (HEA) residual stress |
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