On the Friction Stir Welding of Al 7075 Thin Sheets

Metals

Markos Petousis¹  Achilles Vairis¹  Nectarios Vidakis¹  Andreas Dimopoulos¹ 

[1] Mechanical Engineering Department, Hellenic Mediterranean University, 71410 Heraklion Crete, Greece;

关键词: friction stir welding (FSW);    welding speed;    rotational speed;    tool geometry;    tool wear;    process parameters;   

DOI  :  10.3390/met11010057

来源: DOAJ

【 摘 要 】

The aim of this work was to weld thin sheets (2 mm) of Al 7075 in a butt joint configuration using friction stir welding and to identify the appropriate tool geometry and optimum process parameters. Two tools were produced with heat treatable low alloy steel WNr 1.6582/DIN 34CrNiMo6 with a different pin diameter (3 mm and 4 mm). Welding was performed at a range of rotation speeds 1000–2500 rpm and various welding speeds 80–800 mm/min. The tensile strength was measured to evaluate mechanical properties. Results showed that despite the difficulties in friction stir welding thin plates, sound joints can be produced in a repeatable manner, without visible wear on the welding tool. The mechanical strength of the welds showed a decrease (33.75%) over that of the parent material. The mechanical strength was less affected by rotation speed than welding speed and there was a significant decrease in tensile strength compared to the parent material.

【 授权许可】

Unknown