Effect of Processing Parameters on Properties of Friction Stir Welded Joints of Aluminium Alloys AA7075- T651 and AA6061-T6
الموضوعات :H. S. Patil 1 , Neelsai Sharma Kairav Patel 2 , Abhishek Patel Viral Patel 3 , Chetan Patil 4
1 - Mechanical Department, GIDC Degree Engineering College
Abrama, Gujarat, India
2 - UG Students, Mechanical Department,
GIDC Degree Engineering College, Abrama, Gujarat, India
3 - UG Students, Mechanical Department,
GIDC Degree Engineering, Abrama, Gujarat, India
4 - Mechanical Department, PSE, Saki-Palsana, Gujarat, India
الکلمات المفتاحية: Mechanical Properties, Microstructures, AA7075 and AA6061, FSW,
ملخص المقالة :
In the present investigation the mechanical behaviour of AA7075T651 and AA6061T6 aluminium alloys plates joined by friction stir welding (FSW) were evaluated. The effects of weld process parameter like tool rotation speed 650-1000 rpm and weld speed 30-40mm/min with square trapezoidal pin profile on mechanical properties were investigated. The welded joints were tested by means of by X-ray radiography, tensile, hardness and optical microscopy testing. The radiography revealed the presence of internal in FS welds and observed that increasing transverse speed increases the occurrence of weld defects. The hardness was found to be mixed effect with respect to tool rotations and transverse speed for similar FSW joints. But in dissimilar FSW joints, hardness decreases with increasing tool speed and weld speed and it was strongly affected by precipitate distribution. Difference in grain size and distribution was observed for different ranges of rotation and weld speed.
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