超声波振动辅助激光包覆铁基非晶涂层的晶体和非晶态转变研究

IF 3.8 2区 物理与天体物理 Q1 ACOUSTICS
Haolun Song , Chunhuan Guo , Yangyang Wu , Fengchun Jiang , Lin Chen , Mingying Xiao , Bo Jiao , Tao Dong , Shubang Wang , Zhuhui Qiao , Sergey Konovalov
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引用次数: 0

摘要

为了研究超声波振动(UV)对非晶涂层微观结构评价的影响,采用激光熔覆技术制备了有UV和无UV的铁基非晶(Fe41.5Co12.2Cr7.4Mo37.3C0.3B0.5Y0.4Al0.4)涂层。为了解紫外线对非晶涂层的作用机理,对涂层的微观结构和耐腐蚀性能进行了详细研究。研究发现,紫外线产生的空化效应细化并破坏了界面上的柱状晶体。与不使用紫外线的涂层相比,使用紫外线的涂层柱状晶体的平均长度减少了 57.52%,从 25.26 ± 5.89 μm 减少到 10.73 ± 3.91 μm。此外,声压梯度推动熔池加速流动,使流速高达 0.134 m/s。紫外线的声流效应促进了元素的均匀分布,抑制了金属间化合物的偏析,从而将非晶态含量从 68.5% 提高到 75.3%。紫外线的声流效应和空化效应细化了微观结构,增加了非晶含量,有助于提高耐腐蚀性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on crystal and amorphous transformation of ultrasonic vibration assisted laser cladded Fe-based amorphous coatings

In order to investigate the influence of ultrasonic vibration (UV) on microstructural evaluation of amorphous coating, the Fe-based amorphous (Fe41.5Co12.2Cr7.4Mo37.3C0.3B0.5Y0.4Al0.4) coatings with and without UV were fabricated by laser cladding technology. The microstructure and corrosion resistance of the coatings were studied in detail to understand the mechanism of the UV on amorphous coatings. It can be found that the cavitation effect generated by UV refines and breaks the columnar crystals at the interface. Compared to the coatings without UV, the average length of columnar crystals of coatings with UV decreases by 57.52 %, reducing from 25.26 ± 5.89 μm to 10.73 ± 3.91 μm. In addition, the sound pressure gradient drives the accelerated flow of the molten pool, resulting in a flow velocity of up to 0.134 m/s. The acoustic streaming effect of UV promotes the uniform distribution of elements and inhibits the segregation of the intermetallic compounds, which increases the amorphous content from 68.5 % to 75.3 %. The acoustic streaming and cavitation effects refine the microstructure and increase the amorphous content by using of UV, which contributes to improve the corrosion resistance.

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来源期刊
Ultrasonics
Ultrasonics 医学-核医学
CiteScore
7.60
自引率
19.00%
发文量
186
审稿时长
3.9 months
期刊介绍: Ultrasonics is the only internationally established journal which covers the entire field of ultrasound research and technology and all its many applications. Ultrasonics contains a variety of sections to keep readers fully informed and up-to-date on the whole spectrum of research and development throughout the world. Ultrasonics publishes papers of exceptional quality and of relevance to both academia and industry. Manuscripts in which ultrasonics is a central issue and not simply an incidental tool or minor issue, are welcomed. As well as top quality original research papers and review articles by world renowned experts, Ultrasonics also regularly features short communications, a calendar of forthcoming events and special issues dedicated to topical subjects.
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