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首页> 外文期刊>International journal of structural integrity >Parametric optimization of friction stir welding process for marine grade aluminum alloy
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Parametric optimization of friction stir welding process for marine grade aluminum alloy

机译：船用铝合金搅拌摩擦焊工艺参数优化

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Purpose - The purpose of this paper is to deal with the experimental data related to the friction stir welding (FSW) of marine grade Al-Mg4.2 alloy. Mathematical models are developed to study the individual and interaction effects of input variables on the performance characteristics of joints. FSW parameters are optimized to maximize the yield strength and weld nugget microhardness of the welded joints. Design/methodology/approach - Response surface methodology is applied to establish the mathematical relationship between six input factors, namely, tool rotational speed, transverse speed, tool shoulder diameter, tool material hardness, tilt angle and pin profile; and two response variables, namely, yield strength and weld nugget microhardness. Six factors-five-level rotatable central composite matrix is used for the design of experiments. The quadratic model is used, as suggested by the design expert software, to express the response parameters as a function of investigated input parameters. The competence of the developed models is verified through analysis of variance. Findings - The present investigation clearly indicates that the studied input factors have a significant effect on the quality of the joints. The optimal combination of input factors is determined to achieve the desired responses. Originality/value - This paper teems a new look on tensile and hardness properties of Al-Mg4.2 joints by relating the microstructure, fractrographs and grains distribution with the dynamic recrystallization and plasticized material movement during the FSW process. The outcome of this research will help in seizing the opportunities of joining Al-Mg4.2 alloy using FSW, in the offshore and marine applications.
机译：目的-本文的目的是处理与海洋级Al-Mg4.2合金的搅拌摩擦焊（FSW）相关的实验数据。开发了数学模型来研究输入变量对关节性能特征的个体和相互作用影响。对FSW参数进行了优化，以最大程度地提高焊接接头的屈服强度和焊点熔核显微硬度。设计/方法/方法-应用响应面方法建立六个输入因素之间的数学关系，即工具转速，横向速度，工具肩部直径，工具材料硬度，倾斜角和销轮廓；和两个响应变量，即屈服强度和焊点熔核显微硬度。实验设计采用六因子五级可旋转中央复合矩阵。如设计专家软件所建议，使用二次模型来表示响应参数作为所研究输入参数的函数。通过方差分析验证了所开发模型的能力。发现-本研究清楚地表明，所研究的输入因素对关节的质量具有重要影响。确定输入因子的最佳组合以实现所需的响应。原创性/价值-本文通过将FSW过程中的动态再结晶和塑化材料运动与微观结构，断口图和晶粒分布联系起来，从而使Al-Mg4.2接头的拉伸和硬度性能焕然一新。这项研究的结果将有助于抓住机会，在海上和海洋应用中使用FSW连接Al-Mg4.2合金。

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