کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
830856 1470361 2012 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of welding parameters on microstructure and mechanical properties of friction stir welded joints of AA7039 aluminum alloy
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Effect of welding parameters on microstructure and mechanical properties of friction stir welded joints of AA7039 aluminum alloy
چکیده انگلیسی

A high strength Al–Zn–Mg alloy AA7039 was friction stir welded by varying welding and rotary speed of the tool in order to investigate the effect of varying welding parameters on microstructure and mechanical properties. The friction stir welding (FSW) process parameters have great influence on heat input per unit length of weld, hence on temperature profile which in turn governs the microstructure and mechanical properties of welded joints. There exits an optimum combination of welding and rotary speed to produce a sound and defect free joint with microstructure that yields maximum mechanical properties. The mechanical properties increase with decreasing welding speed/ increasing rotary speed i.e. with increasing heat input per unit length of welded joint. The high heat input joints fractured from heat affected zone (HAZ) adjacent to thermo-mechanically affected zone (TMAZ) on advancing side while low heat input joints fractured from weld nugget along zigzag line on advancing side.


► FSW process parameters were optimized for developing sound joints.
► Welding speed predominantly affected grain size of HAZ.
► Average weld nugget hardness increased with increase in rotary speed.
► Change in heat input shifted fracture location from HAZ to WNZ.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design (1980-2015) - Volume 36, April 2012, Pages 379–390
نویسندگان
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