بررسی شکل‌گیری عیوب و لایه‌های بین فلزی در جوشکاری اصطکاکی اغتشاشی آلومینیم AA1100 به فولاد A441 AISI

نوع مقاله: علمی-پژوهشی

نویسندگان

1 دانش‌آموخته، گروه مواد، واحد ساری، دانشگاه آزاد اسلامی

2 استادیار، دانشگاه صنعتی نوشیروانی بابل

3 استادیار، گروه مواد، واحد آیت الله آملی، دانشگاه آزاد اسلامی

چکیده

در این پژوهش، اثرات پارامترهای مختلف جوشکاری اصطکاکی اغتشاشی در شکل گیری ترکیبات بین فلزی، عیوب و مقاومت کششی اتصالات آلومینیوم AA1100 به فولاد A441 AISI مورد بررسی قرار گرفت. در سرعت­های جوشکاری پایین و سرعت­های دورانی بالا، لایه­های بین فلزی شکل گرفته ضخیم تر از حالت های دیگر بود. ترکیب این لایه هاAl6Fe  و Al5Fe2  بود که در فصل مشترک دو قطعه کار شکل گرفتند. عمده عیوب شکل گرفته در این اتصالات عیوب تونلی و در سرعت دورانی پایین به دلیل تولید و توزیع حرارت نامناسب عیوب تونلی شکل گرفته با افزایش سرعت خطی و سرعت دورانی ابزار کوچک شدند. به دلیل تولید گرمای بیشتر در اثر افزایش عمق نفوذ ابزار عیوب داخلی کوچکتر شدند. با کنترل پارامتر های مکانیکی فرآیند و در سرعت دورانی 800 دور بر دقیقه و سرعت خطی 63 میلیمتر بر دقیقه و عمق نفوذ 2/0 میلیمتر مستحکم ترین اتصال تولید شد که در حدود 90 درصد فلز پایه ی آلومینیومی استحکام داشت.

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