Effect of beam oscillation on the microstructure, residual stress, mechanical and corrosion properties of electron beam welded AISI 304SS joints

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Bulletin of Materials Science Pub Date : 2025-10-03 DOI:10.1007/s12034-025-03454-x

A Rathore, G G Roy, J K Singh, J Dutta Majumdar

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Abstract

The present study concerns the understanding of the effect of beam oscillation on electron beam welded AISI 304 stainless steel. The effect of beam oscillation on the microstructure, mechanical properties and electrochemical properties of electron beam welded AISI 304 stainless steel has been analysed. Welding was carried out using an 80 kV, 12 kW electron beam welding unit, using a static beam and an oscillated beam of varied oscillation diameters (1 and 2 mm). The weld morphology in terms of microstructure and residual stress developed in the weld zone was evaluated. A static beam led to the formation of skeletal dendrites in the fusion zone, while the application of an oscillated beam developed a combination of dendrites of lathy and skeletal morphology. The residual stress developed in the fusion zone and heat-affected zone was meticulously measured and was found to vary with welding parameters. The hardness measurement showed a marginally higher microhardness in the fusion zone when beam oscillation was applied (250 VHN) as compared to static beam (245 VHN). Tensile strength variation shows that an oscillated beam offers a higher yield strength (281–270 MPa) and ultimate tensile strength (785–794 MPa) as compared to the static beam (263 and 751 MPa). The percentage elongation in the weld zone developed with an oscillated beam was 127%, which was 21% higher than that of static beam weld (106%). The electrochemical corrosion behaviour also showed a superior corrosion resistance of the weld zone when beam oscillation was applied. The enhancement of mechanical and electrochemical properties developed by oscillated beams has been stated.

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电子束振荡对电子束焊接AISI 304SS接头显微组织、残余应力、力学性能和腐蚀性能的影响

本文研究了电子束振荡对电子束焊接AISI 304不锈钢的影响。分析了电子束振荡对电子束焊接AISI 304不锈钢的显微组织、力学性能和电化学性能的影响。焊接采用80 kV， 12 kW的电子束焊接装置，采用不同振荡直径（1和2 mm）的静束和振荡束。从微观组织和焊接区残余应力的角度对焊缝形貌进行了评价。静态梁导致在熔合区形成骨骼枝晶，而振荡梁的应用发展了板状和骨骼形态的枝晶的组合。仔细测量了熔合区和热影响区产生的残余应力，发现残余应力随焊接参数的变化而变化。硬度测量显示，当施加250 VHN的光束振荡时，熔合区的显微硬度略高于静态光束（245 VHN）。抗拉强度变化表明，振荡梁的屈服强度（281 ~ 270mpa）和极限抗拉强度（785 ~ 794 MPa）高于静梁（263和751 MPa）。振荡梁焊缝区伸长率为127%，比静梁焊缝区伸长率（106%）高21%。当施加梁振荡时，焊缝区的电化学腐蚀行为也表现出优异的耐蚀性。论述了振荡梁对材料力学性能和电化学性能的增强作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bulletin of Materials Science 工程技术-材料科学：综合

CiteScore

3.40

自引率

5.60%

发文量

209

审稿时长

11.5 months

期刊介绍： The Bulletin of Materials Science is a bi-monthly journal being published by the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy. The journal publishes original research articles, review articles and rapid communications in all areas of materials science. The journal also publishes from time to time important Conference Symposia/ Proceedings which are of interest to materials scientists. It has an International Advisory Editorial Board and an Editorial Committee. The Bulletin accords high importance to the quality of articles published and to keep at a minimum the processing time of papers submitted for publication.