تحلیل اثر پارامترهای جوشکاری لیزر ضربانی بر هندسه جوش فولاد زنگ‌نزن 316 L توسط طراحی آزمایش

نویسندگان

1 1. دانشکده مهندسی مواد، دانشگاه صنعتی اصفهان، اصفهان

2 2. پژوهشکده مواد و انرژی، پژوهشگاه فضایی ایران، اصفهان

چکیده

در این تحقیق، بهینه‌سازی پارامترهای جوشکاری لیزر ضربانی Nd:YAG بر اتصال لبه‌ روی‌ هم فویل فولاد زنگ‌نزن L316 با هدف پیش‌بینی هندسه جوش توسط روش رویه پاسخ انجام شد. بدین ‌منظور اثر توان لیزر، مدت ضربان و فرکانس جوشکاری مورد بررسی قرار گرفت. روش آماری مذکور به‌خوبی توانست با توسعه چندجمله‌ای درجه دوم به‌منظور تأثیر پارامترهای جوشکاری بر عرض جوش به‌کار برده شود. نتایج نشان داد، عرض جوش در سطوح بالایی، میانی و پایینی مقطع جوش با افزایش مدت ضربان و توان لیزر زیاد می‌شود اما میزان اثر این پارامترها در سطوح مذکور متفاوت است. اثر مدت ضربان در مدل‌های عرض بالایی، میانی و پایینی جوش به‌ترتیب 76، 73 و 68 درصد محاسبه شد و اثر توان لیزر بر آنها به‌ترتیب 18، 24 و 28 درصد اندازه‌گیری شد. درنهایت با بر هم نهادن این مدل‌ها، شرایط بهینه جوشکاری جهت دستیابی به نفوذ کامل جوش و جوش بدون عیب ارائه شد.

کلیدواژه‌ها

عنوان مقاله [English]

Analysis of Pulsed Laser Welding Parameters Effect on Weld Geometry of 316L Stainless Steel using DOE

نویسندگان [English]

  • M. R. Pakmanesh 1
  • M. Shamanian 1
  • S. Asghari 2
1 1.Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran.
2 2. Institute of Materials and Energy, Iranian Space Research Center, Isfahan, Iran.
چکیده [English]

In the present study, the optimization of pulsed Nd:YAG laser welding parameters was done on a lap-joint of a 316L stainless steel foil in order to predict the weld geometry through response surface methodology. For this purpose, the effects of laser power, pulse duration, and frequency were investigated. By presenting a second-order polynomial, the above-mentioned statistical method was managed to be well employed to evaluate the effect of welding parameters on weld width. The results showed that the weld width at the upper, middle and lower surfaces of weld cross section increases by increasing pulse durationand laser power; however, the effects of these parameters on the mentioned levels are different. The effect of pulse duration in the models of weld upper, middle and lower widths was calculated as 76, 73 and 68%, respectively. Moreover, the effect of power on theses widths was determined as 18, 24 and 28%, respectively. Finally, by superimposing these models, optimum conditions were obtained to attain a full penetration weld and the weld with no defects.

کلیدواژه‌ها [English]

  • Pulsed laser welding
  • Weld geometry
  • Response surface methodology
  • Bipolar plate
  • Fuel cell

مراجع

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مواد پیشرفته در مهندسی
دوره 36، شماره 4
اسفند 1396
صفحه 105-116

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