U-Welding

This set of flashcards covers essential welding terminology and types of welding joints.

U-groove weld

A type of groove weld where the edges of the joint members are shaped like a 'U'.

Ultra-low-hydrogen electrode

A covered electrode that provides a lower hydrogen atmosphere to prevent cracking in high-strength steels.

Ultrasonic cutting (UAC)

A thermal cutting process that severs materials using heat from ultrasonic vibrations.

Ultrasonic welding (USW)

A solid-state welding process that produces coalescence through high-frequency vibratory energy under pressure.

Underbead crack

A crack in the heat-affected zone (HAZ) that does not extend to the surface of the base metal.

Undercut

A groove melted into the base metal near the weld toe or root that is left unfilled by weld metal.

Underfill

A condition where the weld face or root surface is below the adjacent surface of the base metal.

Unfilled crater

A depression located at the termination of a weld bead.

Unhomed

A robot that has not been synchronized to its reference position.

Unit of current

The ampere (A).

Unit of resistance

The ohm ($\Omega$).

Unit of voltage

The volt (V).

Upset

Bulk deformation caused by pressure application in welding.

Upset welding (UW)

A resistance welding process that produces coalescence using heat from resistance to welding current.

Lap Joint

A joint where two pieces overlap each other.

Butt Joint

A joint where two pieces are joined end-to-end.

Tee Joint

A joint formed by the intersection of two pieces at right angles.

Corner Joint

A joint created at the corner where two pieces meet.

Edge Joint

A joint formed between the edges of two pieces.