بررسی اثر متغیرهای جوشکاری بر اتصال غیر همجنس اصطکاکی تلاطمی نقطه‌ای ورق‌های 5083-Al و 12-St

نوع مقاله : علمی و پژوهشی

نویسندگان

دانشگاه صنعتی شریف

چکیده

هدف از این تحقیق، بررسی تاثیر متغیرهای سرعت چرخشی و زمان ماند بر استحکام اتصالات غیرهمجنس آلیاژهای آلومینیم 5083-Al و فولاد 12- Stمی‌باشد که با فرآیند جوشکاری اصطکاکی تلاطمی نقطه‌ای و بدون ورود پین به ورق فولادی (ورق پایینی) به یکدیگر متصل شده‌اند. سرعت‌های چرخشی، 900 و 1100 دور بر دقیقه و زمان‌های ماند، 5 الی 15 ثانیه بودند. نتایج نشان داد که استحکام اتصالات با افزایش زمان ماند ابتدا افزایش و سپس کاهش می‌یابد. علاوه بر این، استفاده از سرعت چرخشی 900 دور بر دقیقه اتصالات مستحکم‌تری را نسبت به سرعت 1100 دور بر دقیقه به همراه داشت.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of Welding Parameters on Dissimilar Friction Stir Spot Welded Al-5083/St-12 Alloy Sheets

نویسندگان [English]

  • Eskandar Fereiduni
  • Mojtaba Movahedi
  • Amir Hossein Kokabi
Sharif University of Technology
چکیده [English]

The present study investigates the effect of rotational speed and dwell time on the strength of Al-5083/St-12 friction stir spot joints. The welds were made using a newly developed FSSW process in which the tool pin did not penetrate into the lower steel sheet. Rotational speeds of 900 and 1100 rpm were applied in association with the dwell times in the range of 5-15 s. Results showed that the strength was first improved and then declined with increasing the dwell time. Furthermore, stronger joints were achieved at 900 rpm compared to the rotational speed of 1100 rpm.

کلیدواژه‌ها [English]

  • Friction Stir Spot Welding
  • Rotational speed
  • Dwell time
  • Fracture load
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