刀具转速对搅拌摩擦焊接AA2014-T6铝合金组织特征和力学性能的影响

C. Rajendran, R. Guru, S. Kavin, P. Navanithan, P. N. Kalathil
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引用次数: 0

摘要

搅拌摩擦焊(FSW)是一种很有前途的用于沉淀硬化高强度铝合金的固态焊接工艺。通过实验和理论研究,验证了刀具转速对高强合金AA2014显微组织特征和拉伸性能的影响。在保持焊接速度、焊肩直径、刀具倾斜角度等参数不变的情况下,在1100 ~ 1900 rpm范围内以200 rpm为等量增量加工FSW接头。摩擦焊接头的强度与显微硬度、显微组织和断口形貌有关。当刀具转速为1500 rpm,焊接速度为50 mm/min,焊肩直径为6 mm,刀具倾角为1.5°时,接头强度为376 MPa。它可以通过物料流动平衡和搅拌区无缺陷来实现。
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Influence of tool rotation speed on microstructural characteristics and mechanical properties of friction stir welded AA2014-T6 aluminium alloy
Friction stir welding (FSW) is a promising solid-state welding process for precipitation hardening and high strength aluminium alloys. An experimental and theoretical investigation was carried out to check the significance of tool rotation speed on microstructural characteristics and tensile properties of high-strength alloy AA2014. FSW joints were made with varying tool rotation speed from 1,100 rpm to 1,900 rpm with an equal increment of 200 rpm, while the other parameters such as welding speed, shoulder diameter and tool tilt angle were kept constant. The strength of FSW joints was correlated with microhardness, microstructure and fractographs. The joint fabricated with the tool rotation speed of 1,500 rpm, welding speed of 50 mm/min, shoulder diameter of 6 mm and tool tilt angle of 1.5° exhibited superior strength (376 MPa) than the other joints. It could be achieved by the balanced flow of material and defect-free in the stir zone.
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来源期刊
CiteScore
1.20
自引率
0.00%
发文量
3
期刊介绍: IJCMSSE is a refereed international journal that aims to provide a blend of theoretical and applied study of computational materials science and surface engineering. The scope of IJCMSSE original scientific papers that describe computer methods of modelling, simulation, and prediction for designing materials and structures at all length scales. The Editors-in-Chief of IJCMSSE encourage the submission of fundamental and interdisciplinary contributions on materials science and engineering, surface engineering and computational methods of modelling, simulation, and prediction. Papers published in IJCMSSE involve the solution of current problems, in which it is necessary to apply computational materials science and surface engineering methods for solving relevant engineering problems.
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