Analysis of Microstructure and Hardness of Weld Spots during Laser-Acoustic Heating of Stainless Steel

IF 0.3 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
I. V. Shvarts, Ya. V. Krylov, S. A. Nikiforov, A. I. Gorunov, A. Kh. Gilmutdinov
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引用次数: 0

Abstract—Laser-acoustic method of spot heating of stainless steel AISI 316L is under consideration. Equipment for carrying out experiments with and without the application of ultrasonic vibrations with a frequency of 40 kHz and a power of 100 W is developed. The microstructure of weld spots is analyzed based on the obtained optical images. A globular form of dendrites during processing with ultrasonic exposure is revealed in contrast to the columnar form of dendrites obtained during processing in the traditional way. An algorithm is developed for determining the percentage content of phase components of the obtained microstructure—austenite and the conventionally introduced “X” phase, which takes into account ferrite and other possible new formations in the structure of the weld spot. Comparative analysis shows that the content of the X-phase on the fusion line is almost the same, while in the central and mixed zones of the weld spot, its percentage content is 51 and 41% higher in the experiments carried out with ultrasonic exposure. The analysis shows an increase in the hardness of weld spots within 5%. A conclusion is made about the advisability of developing and using a laser-acoustic processing method.

Abstract Image

不锈钢激光声加热焊缝组织及硬度分析
摘要:研究了AISI 316L不锈钢的激光声点焊加热方法。研制了频率为40千赫、功率为100瓦的超声波振动进行实验和不进行实验的设备。根据获得的光学图像分析了焊缝的显微组织。与传统方法处理过程中获得的柱状树突相比,超声暴露处理过程中显示的是球状树突。在考虑了铁素体和其他可能在焊缝组织中形成的新组织的情况下,开发了一种用于确定获得的显微组织-奥氏体和常规引入的“X”相的相成分百分比含量的算法。对比分析表明,超声暴露实验中熔合线上x相含量基本相同,而焊缝中心区和混合区x相含量分别高出51%和41%。分析表明,焊缝的硬度提高了5%。提出了开发和应用激光声处理方法的可行性。
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来源期刊
Inorganic Materials: Applied Research
Inorganic Materials: Applied Research Engineering-Engineering (all)
CiteScore
0.90
自引率
0.00%
发文量
199
期刊介绍: Inorganic Materials: Applied Research  contains translations of research articles devoted to applied aspects of inorganic materials. Best articles are selected from four Russian periodicals: Materialovedenie, Perspektivnye Materialy, Fizika i Khimiya Obrabotki Materialov, and Voprosy Materialovedeniya  and translated into English. The journal reports recent achievements in materials science: physical and chemical bases of materials science; effects of synergism in composite materials; computer simulations; creation of new materials (including carbon-based materials and ceramics, semiconductors, superconductors, composite materials, polymers, materials for nuclear engineering, materials for aircraft and space engineering, materials for quantum electronics, materials for electronics and optoelectronics, materials for nuclear and thermonuclear power engineering, radiation-hardened materials, materials for use in medicine, etc.); analytical techniques; structure–property relationships; nanostructures and nanotechnologies; advanced technologies; use of hydrogen in structural materials; and economic and environmental issues. The journal also considers engineering issues of materials processing with plasma, high-gradient crystallization, laser technology, and ultrasonic technology. Currently the journal does not accept direct submissions, but submissions to one of the source journals is possible.
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