High-speed friction stir welding in light weight battery trays for the EV industry

• Present work aims to achieve high welding speed during friction stir welding of lightweight battery trays in the electric vehicle industry. This study reports high-speed friction stir welding (HSFSW) up to 4.0 m mi -1 in AA6063-T6 alloys. The defect-free HSFSW joints are produced by adopting aggressive material mixing, i.e. higher tool rotation and plunge force. HSFSW weld cross-section reported an unusual hardness profile of "U"shape instead of "W"shape in conventional FSW of AA6xxx alloys. HSFSW resulted softening of weld stir zone (~60HV) along with HAZ (~53HV) against the base material (BM) hardness of ~90HV. The HSFSW at 4.0 m min -1 obtained good joint strength of 71% of the BM. Microstructure evolutions across the fractured weld cross-section are discussed using EBSD analysis.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)

Keyword

high-speed friction stir welding

lightweight

battery trays

electric vehicle

welding speed

Production Technology

Produktionsteknik

Publication and Content Type

ref (subject category)

art (subject category)