首页> 外文期刊>Arabian Journal for Science and Engineering. Section A, Sciences >Simulation and Experimental Studies on Arc Efficiency and Mechanical Characterization for GTA-Welded Ti–6Al–4V Sheets
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Simulation and Experimental Studies on Arc Efficiency and Mechanical Characterization for GTA-Welded Ti–6Al–4V Sheets

机译:用于GTA焊接Ti-6AL-4V薄片电弧效率和机械表征的仿真与实验研究

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摘要

Gas tungsten arc (GTA) welding process is the best choice for joining Ti–6Al–4V (grade 5) material, with economical cost. To support the above aim, two simulation works are studied in this research. First work focuses on the simulation of GTA welding process. The second work focuses on the simulation of the tensile and cupping test. Initially, GTA welding parameters such as welding current (115-135 A) and welding speed (250–450 mm/min) are taken for conducting bead on plate (BoP) trials. From these BoP trails, bead profiles are measured to build a moving heat source model in COMSOL. The arc efficiency (η) is focused on this welding simulation. Using Abaqus software, tensile and cupping test analysis is performed to predict the fracture location and elongation. The bead profile at arc efficiency of 60% showed a better match with the experimental work. By implementing the temperature distribution analysis, the bright silver colour bead is achieved in experimental work. The butt joint showed comparable strength (95.9%) to the base metal; also the simulation error is not exceeded by 10%. The crack location predicted from the numerical study highly coincides with the experimental work for the cupping test.
机译:气体钨弧(GTA)焊接过程是加入TI-6AL-4V(5级)材料的最佳选择,具有经济的成本。为支持上述目的,在本研究中研究了两项模拟作品。第一项工作侧重于GTA焊接过程的仿真。第二项工作侧重于仿真拉伸和拔罐试验。最初,GTA焊接参数如焊接电流(115-135A)和焊接速度(250-450mm / min)被用于在板(BOP)试验上进行珠子。从这些BOP小径中,测量珠子轮廓以在COMSOL中构建移动的热源模型。电弧效率(η)集中在该焊接仿真上。使用ABAQUS软件,进行拉伸和拔罐试验分析以预测断裂位置和伸长率。弧形效率为60%的珠子曲线显示出与实验工作更好的匹配。通过实施温度分布分析,在实验工作中实现明亮的银色珠。对接接头显示出基础金属的相当强度(95.9%);此外,模拟错误不会超过10%。从数值研究预测的裂缝位置与拔罐测试的实验工作高度一致。

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