Khalili, A., Kasiri-Asgarani, M., Shamanian, M. (2016). Optimization of the Pulsed Gas Tungsten Arc Welding in Dissimilar Joining Austenitic Stainless Steel AISI 316L to Nickel-Base Super Alloy of Monel 400. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9(4), 587-594.
Ali Khalili; Masoud Kasiri-Asgarani; Mortaza Shamanian. "Optimization of the Pulsed Gas Tungsten Arc Welding in Dissimilar Joining Austenitic Stainless Steel AISI 316L to Nickel-Base Super Alloy of Monel 400". Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9, 4, 2016, 587-594.
Khalili, A., Kasiri-Asgarani, M., Shamanian, M. (2016). 'Optimization of the Pulsed Gas Tungsten Arc Welding in Dissimilar Joining Austenitic Stainless Steel AISI 316L to Nickel-Base Super Alloy of Monel 400', Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 9(4), pp. 587-594.
Khalili, A., Kasiri-Asgarani, M., Shamanian, M. Optimization of the Pulsed Gas Tungsten Arc Welding in Dissimilar Joining Austenitic Stainless Steel AISI 316L to Nickel-Base Super Alloy of Monel 400. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 2016; 9(4): 587-594.
Optimization of the Pulsed Gas Tungsten Arc Welding in Dissimilar Joining Austenitic Stainless Steel AISI 316L to Nickel-Base Super Alloy of Monel 400
1MSc , Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University,Najafabad,Iran.
2Assistant Professor, Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University,Najafabad,Iran
3Professer, Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University,Najafabad,Iran.
Abstract
In this research, optimization of the pulsed gas tungsten arc welding including pulse current, background current, pulse frequency and on time were investigated in welding of non-similar materials of austenitic stainless steel AISI 316L and nickel-base super alloy of Monel 400 by using ERNiCr3 filler metal. In order to obtain optimum conditions of welding the Taguchi method with the L9 array was used. The mechanical properties such as bending, tesile test and hardness test were performed on the samples and after that analysis of the variance was performed. By predicting optimal conditions, the proposed model was examined and the results of computational analysis shows a significant similarity with results of the experiment. Optimal parameters of pulsed tungsten arc welding were the pulse current of 140 mA, background current of 60 mA, pulse frequency of 3 Hz and the ON periods of pulse was 50%. The optimized sample with the Taguchi method and the welded sample shows the similarity of 98.7%. Pulse current percentage of 23.4 and pulse frequency of 28.2 were identified as the most influential parameters during the welding. Tensile test results showed that the failure occurs on the side of the base metal on Monel 400 one and hence the failure is the ductile one. These results show the strength of the weld metal confirmed the tensile and bending tests
بهینه سازی پارامترهای جوشکاری قوس تنگستن گاز پالسی در اتصال غیرمشابه مونل۴۰۰ و فولاد زنگ نزن آستنیتیL۳۱۶
Authors [Persian]
علی خلیلی, مسعود کثیری عسگرانی, مرتضی شمعانیان
Abstract [Persian]
در این مقاله بهینه سازی پارامترهای جوشکاری قوس تنگستن-گاز پالسی از جمله جریان پالس، جریان زمینه، فرکانس پالس و کسر زمان روشن بودن پالس در اتصال غیرمشابه فولاد زنگ نزن آستنیتی AISI 316L و سوپر آلیاژ پایه نیکل مونل۴۰۰ با استفاده از فلز پر کننده ERNiCr3، ارزیابی شد. جهت بدست آوردن شرایط بهینه از روش طراحی آزمایش تاگوچی، آرایه L9، استفاده گردید. برروی نمونه های جوشکاری شده آزمون های خواص مکانیکی انجام و سپس آنالیز واریانس انجام گرفت. با پیش بینی شرایط بهینه، نمونه پیشنهادی مورد آزمایش واقع گردید و نتایج آزمایشهای آن با نتایج حاصل از آزمایش بر روی نمونه بهینه طراحی شده مطابقت نشان داد. پارامترهای بهینه قوس تنگستن گاز پالسی در این اتصال، جریان پالس ۱۴۰ آمپر، جریان زمینه ۶۰ آمپر، فرکانس پالس ۳ هرتز و کسر زمان روشن بودن پالس ۵۰ درصد می باشد. نمونه ی بهینه طراحی شده با نمونه پیشنهادی تاگوچی در حدود۷/۹۸ درصد همخوانی دارند. جریان پالس با درصد۴/۲۳و فرکانس پالس با درصد ۲/۲۸به عنوان تاثیرگذارترین پارامترها شناسایی شدند. خواص مکانیکی، شامل آزمایش های خمش، کششی، سختی سنجی بررسی شد. در طی اعمال آزمایش کشش بر روی نمونه ها،شکست از سمت فلز پایه مونل ۴۰۰ اتفاق افتاد که از نوع شکست نرم می باشد. بنابراین استحکام فلز جوش تایید کننده آزمونهای کشش و خمش می باشد.
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