Investigation of Annealing Heat Treatment Effect on the Microstructure and Mechanical Properties of Friction Stir Welded C70600 Copper Nickel Alloy Joints

Q4 Engineering International Journal of Mechatronics and Automation Pub Date : 2014-06-01 DOI:10.1166/JOM.2014.1051

H. Biglari, Salar Salahi, S. Gharajeh, Mehrdad Ganbari Azar

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引用次数: 3

Abstract

Friction stir welding (FSW) is a solid state welding process for joining aluminum, magnesium, zinc, copper alloys, etc. In this paper, effect of annealing heat treatment on the microstructure and mechanical properties of friction stir welded C70600 copper nickel alloy joints was investigated. Six different samples were welded in various annealing conditions and the tool rotation speeds. Microstructural properties were investigated by means of optical microscopy. Hardness value and tensile strengths of the specimens were investigated by Vickers hardness and standard tensile tests. Results show that by increasing the annealing time and decreasing rotation speed, the grain size in the NZ decreased significantly, hardness rose and tensile strength improved. The hardness behavior of friction stir welded joints was discussed by grain size variation and dislocation density. Investigations show that annealing heat treatment had significant influence on the hardness and tensile strength of FS welded C70600 copper nickel joints.

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退火热处理对C70600铜镍合金搅拌摩擦焊接接头组织和力学性能影响的研究

搅拌摩擦焊(FSW)是一种连接铝、镁、锌、铜等合金的固态焊接工艺。研究了退火热处理对C70600铜镍合金搅拌摩擦焊接接头组织和力学性能的影响。在不同的退火条件和刀具转速下焊接6种不同的试样。用光学显微镜研究了其显微组织性能。通过维氏硬度和标准拉伸试验研究了试样的硬度值和抗拉强度。结果表明:随着退火时间的延长和转速的降低，NZ中的晶粒尺寸明显减小，硬度升高，抗拉强度提高;从晶粒尺寸变化和位错密度两方面探讨了搅拌摩擦焊接头的硬度行为。研究表明，退火热处理对C70600铜镍FS焊接接头的硬度和抗拉强度有显著影响。

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来源期刊

International Journal of Mechatronics and Automation Engineering-Industrial and Manufacturing Engineering

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1.60

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