Advancements in joining Al-Zn-TiC-Mg composites using friction stir welding process: Influence of traverse speed

IF 2.3 3区 材料科学 Q3 MATERIALS SCIENCE, COMPOSITES
Amin Abdollahzadeh, Behrouz Bagheri Vanani, Abbas Masoudi Morghmaleki, Ahmad Ostovari Moghaddam, Ali Reza Eivani
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Abstract

In this article, dissimilar magnesium and aluminum alloys were welded with a Zn interlayer and TiC nanoparticles by friction stir welding. Optimal joining conditions were achieved by a combination of three traverse speeds (30, 45, and 60 mm/min) and constant rotational speeds (1050 rpm). The best microstructure evolution and mechanical properties were achieved for specimens joined at rotational and traverse speeds of 1050 rpm and 45 mm/min, respectively. The grain size decreases as the traverse speed increases from 30 to 45 mm/min due to a reduction in heat input, an improvement in reinforcing distribution, and high intermixing of materials, then increases from 45 to 60 mm/min due to inadequate heat input for recrystallization process. It was shown that the TiC particles play a prominent role in the microstructure modification and enhance mechanical properties of weld samples while the Zn foil interlayer plays a vital in avoiding the formation of Al-Mg IMC phases. The obtained result under optimal welding parameters indicates that MgZn2, Mg-Al-Zn compounds, Mg and Al solid solution, were the main detected common phases in the stir zone instead of the brittle and hard Al-Mg IMCs formation. The average hardness values of 232 Hv were achieved, while the strength of the weld specimen experiences the 189 MPa value. In addition, a combination of brittle and ductile modes was observed based on the fracture surface of the weld sample after the tensile test.
使用搅拌摩擦焊工艺连接铝锌钛镁复合材料的进展:横移速度的影响
本文通过搅拌摩擦焊焊接了带有 Zn 夹层和 TiC 纳米粒子的异种镁铝合金。三种横移速度(30、45 和 60 毫米/分钟)和恒定转速(1050 转/分钟)的组合达到了最佳焊接条件。分别以 1050 转/分钟和 45 毫米/分钟的旋转和横移速度焊接的试样获得了最佳的微观结构演变和机械性能。随着横移速度从 30 mm/min 增加到 45 mm/min,晶粒尺寸减小,这是由于热量输入减少、增强分布改善以及材料混合程度高所致;然后,由于再结晶过程热量输入不足,晶粒尺寸从 45 mm/min 增加到 60 mm/min。结果表明,TiC 颗粒在焊接样品的微观结构改良和机械性能提高方面发挥了重要作用,而 Zn 箔夹层在避免形成 Al-Mg IMC 相方面发挥了关键作用。最佳焊接参数下获得的结果表明,MgZn2、Mg-Al-Zn 化合物、Mg 和 Al 固溶体是搅拌区中主要检测到的常见相,而不是脆而硬的 Al-Mg IMC。焊接试样的平均硬度值达到 232 Hv,强度值达到 189 MPa。此外,根据拉伸试验后焊接试样的断裂面,还观察到脆性和韧性模式的结合。
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来源期刊
Journal of Composite Materials
Journal of Composite Materials 工程技术-材料科学:复合
CiteScore
5.40
自引率
6.90%
发文量
274
审稿时长
6.8 months
期刊介绍: Consistently ranked in the top 10 of the Thomson Scientific JCR, the Journal of Composite Materials publishes peer reviewed, original research papers from internationally renowned composite materials specialists from industry, universities and research organizations, featuring new advances in materials, processing, design, analysis, testing, performance and applications. This journal is a member of the Committee on Publication Ethics (COPE).
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