预热对低碳钢搅拌摩擦焊接接头组织和力学性能的影响

IF 1.5 4区 材料科学 Q3 ENGINEERING, MECHANICAL Journal of Engineering Materials and Technology-transactions of The Asme Pub Date : 2022-10-07 DOI:10.1115/1.4055909
Seyed Mehrdad Yamani, S. Raja, Mohammad Ashraf Bin Ariffin, Mohammad Syahid Mohd Isa, M. Muhamad, M. F. Jamaludin, F. Yusof, Muhammad Khairi Faiz Bin Ahmad Hairuddin
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引用次数: 0

摘要

对厚度为0.5mm的低碳钢板进行搅拌摩擦焊接,同时预热基材以提高接合性能。工具的转速设定为1500至2000 rpm,恒定行进速度为15 mm/min,预热温度为50至150°C。在15毫米/分钟的焊接速度下,预热试样的拉伸强度为340兆帕,而非预热试样的抗拉强度为310兆帕。预热接头的电子显微镜图像显示了塑化材料流动和动态再结晶,这导致晶粒细化,从而提高了接头强度。预热的焊接试样几乎消除了焊缝减薄问题。然而,通过进一步提高预热温度,拉伸强度由于过热而形成缺陷而降低。预热后的样品在基底金属处断裂,显示出韧性断裂模式。
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Effects of Preheating on Microstructural and Mechanical Properties of Friction Stir Welded Thin Low Carbon Steel Joints
Friction stir welding of a low carbon steel plate having thickness 0.5 mm was performed with preheating the base material to increase the joining performance. The rotational speed of the tool was set from 1500 to 2000 rpm with a constant travel speed of 15 mm/min and preheating temperatures of 50 to 150 °C. The tensile strength of 340 MPa was achieved for the preheated specimen compared to 310 MPa for the non-preheating specimen at the welding speed of 15 mm/min. Electron microscope images of the preheated joint revealed plasticised material flow and dynamic recrystallisation, which resulted in the grain refinement that had increased the joining strength. The weld thinning issue was almost eliminated in the preheated welded specimen. However, by increasing the preheat temperature further, the tensile strength decreases due to the formation of defects from excessive heat. The preheated sample fractured at the base metal, revealing a ductile fracture mode.
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来源期刊
CiteScore
3.00
自引率
0.00%
发文量
30
审稿时长
4.5 months
期刊介绍: Multiscale characterization, modeling, and experiments; High-temperature creep, fatigue, and fracture; Elastic-plastic behavior; Environmental effects on material response, constitutive relations, materials processing, and microstructure mechanical property relationships
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