Abstract




 
   

IJE TRANSACTIONS A: Basics Vol. 32, No. 1 (January 2019) 127-136    Article in Press

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  CONTROL OF FORMATION OF INTERMETALLIC COMPOUND IN DISSIMILAR JOINTS ALUMINUM-STEEL
 
O. D. Hincapié, J. A. Salazar, J. J. Restrepo, E. A. Torres and J. Graciano-Uribe
 
( Received: October 20, 2018 – Accepted in Revised Form: January 03, 2019 )
 
 

Abstract    The elimination of the FexAly type phases was considered the solution to low ductility presented in aluminum-steel welded joints. Recently, the researches do not seek the suppression but the control of the thickness of these compounds. In this work, Al-Fe joints were manufactured by solid state and fusion welding, looking for controlling the formation of intermetallic compounds. Temperature measurements were carried out during the welding. The joints interface was characterized using optical and scanning electronic microscopy, aided by chemical composition measures with X-EDS. The microstructural characterization at the interface of aluminum-steel joints, in solid state welded joints, demonstrated the absence of intermetallic compounds, which is attributed to the low temperature reached during the process - less than 300 ° C. In the case of fusion joints, it has observed the permanent formation of intermetallic compounds whose thickness varies significantly with the heat input.

 

Keywords    Dissimilar Joints, Heat Input, FexAly Compounds, Friction Welding

 

چکیده   

حذف فازهای FexAly به عنوان راه حل برای کم کاری ورق در اتصالات جوش داده شده با آلومینیوم در نظر گرفته شد. به تازگی، تحقیقات به دنبال مناسب بوده، بلکه کنترل ضخامت این ترکیبات است. در این کار، مفاصل Al-Fe توسط جوشکاری جامد و جوشکاری تولید می شوند، به دنبال کنترل ترکیب ترکیبات بین فلزات هستند. اندازه گیری دما در طی جوشکاری انجام گردید. رابط مفاصل با استفاده از میکروسکوپ الکترونی اپتیک و اسکن، با اندازه گیری ترکیب شیمیایی با X-EDS مشخص شد. خصوصیات میکروساختار در رابط مفاصل آلومینیوم و فولاد، در اتصالات جوش داده شده در حالت جامد، نشان دهنده عدم وجود ترکیبات متالولیک است که به دمای پایین رسیده است - کمتر از 300 درجه سانتی گراد. در مورد اتصالات فیوژن، آن را مشاهده کرده است تشکیل دائمی ترکیبات intermetallic که ضخامت متفاوت با ورودی گرما را دارد.

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