Terminology Flashcards
Acceptable weld
A weld that meets the acceptable requirements
Acetone
A colorless, flammable, volatile liquid used as a paint remover and as a solvent for oils and other organic compounds. Used in acetylene cylinders to saturate the monolithic filler material to stabilize the acetylene
Acetylene feather
The intense white, feathery-edge portion adjacent to the cone of a carburizing oxyacetylene flame
Actual throat
The shortest distance between the weld root and the face of a fillet weld
Adhesion
A state of being stuck together. The joining together of parts that are normally separate
AISI
The American Iron and Steel Institute
Aluminum
One of the chemical elements, a silvery, light weight, easily worked metal that resists corrosion
Ampere
A unit of electrical current measuring the rate of flow of electrons through a circuit. One ampere is equivalent to the current produced by one volt applied across a resistance of one ohm
Annealing
A process of heating then cooling metal to acquire desired qualities such as ductility
Anode
The positive terminal of an electrical source
Arc cutting
a group of thermal cutting processes that severs or removes metal by melting with the heat of an arc between an electrode and work piece
Alloy
a substance with metallic properties, composed of two or more chemical elements of which at least one is metal
alloying element
elements added in large enough percentages to change the characteristics of the metal. such elements may be chromium, manganese, nickle, tungsten, or vanadium; these elements are added to produce specific physical properties such as hardness, toughness, ductility, strength, resistance to corrosion or resistance to wear
alloy steel
a plain carbon steel to which another element, other than iron and carbon, has been added in percentage large enough to alter its characteristics
alternating current (AC)
an electric current that reverses in direction periodically
alternative fuels
propane, methylacetylene propane (MPS), natural gas, or fuel gasses, other than acetylene used for welding or cutting
arc blow
the deflection of an arc from its normal path because of magnetic forces
arc force
the axial force developed by an arc plasma
arc gap
a nonstandard term used for arc length
arc gouging
thermal gouging that uses an arc cutting process variation to form a bevel or groove
arc plasma
a gas that has been heated by an arc to at least a partially ionized condition, enabling it to conduct electric current
arc spraying
a thermal spraying process using an arc between two combustible electrodes or surfacing materials as a heat source and compressed gas to atomize and propel the surfacing material to the substrate
arc strike
a discontinuity resulting from an arc, consisting of any localized re-melted metal, heat-affected metal, or change in surface profile of any metal object
arc time
the time during which an arc is maintained in making an arc weld
arc welding
arc welding is a group of welding processes in which fusion is produced by heating with an electric arc or arcs with or without the application of pressure and with or without the use of filler metal
arc voltage
the voltage across the arc
as welded
the condition of weld metal, welded joint, and weldments after welding, but prior to any subsequent thermal or mechanical treatment
ASTM
american society for testing and materials
austenite
one of the basic steel micro-structures wherein carbon is dissolved in iron. ausenite forms at elevated tempatures
autogenous weld
a fusion weld made without filler material
AWS
american welding society
axis of a weld
a line through the length of a weld, perpendicular to and at the geometric center of its cross section
back bead
a weld bead resulting from a back weld pass, back beads are made after the primary weld is complete
back fire
the momentary recession of the flame into the welding tip, or cutting tip followed by immediate reappearance or complete extinction of the flame, accompanied by a loud popping report
backgouging
the removal of weld metal and base metal from the weld root side of a welded joint to facilitate complete fusion and complete joint penetration upon subsequent welding from that side
backhand welding
a welding technique in which the welding torch or gun is directed opposite the progress of welding
backing
material or device placed against the back side of a joint to support and retain molten weld metal. the material may be partially fused or remain unfused during welding and may be metal or non metal (metal strip, asbestos, carbon, copper, inert gas, ceramics).
backing bead
a weld bead resulting from a backing pass. backing beads are completed before welding the primary weld
backing pass
a weld pass made to provide a backing for the primary weld
backing ring
backing in the form of a ring, generally used in the welding of pipe
backing strip
non-standard term used to describe a backing on the root side of the weld in the form of a strip
back step sequence
a longitudinal sequence in which weld passes are made in the direction opposite the weld progression, usually used to control distortion
back weld
a weld made at the back of a single groove weld
bainite
a steel micro structure that is harder than pearlite, cementite, or ferrite, and more ductile than martensite
base material
the material that is welded, brazed, soldered or cut
bead weld
a term used for surfacing welds
bevel
an edge preparation, the angular edge shape
bevel angle
the angle between the bevel of a joint member and a plane perpendicular to the surface of the member
