Mediaspace scheduled maintenance: Aug 25, 2026 07:00 - 12:00 AM. During this time, videos will be temporarily unavailable. Check status updates.

Lecture

Liquid State Welding: Fundamentals and Techniques

In course

MSE-464: Assembly techniques

Introduction to the assembly of materials by homogeneous or heterogeneous joints (welding, bonding, mechanical assembly). Mechanical and environmental resistance of joints. ...

Description

This lecture covers the fundamentals of liquid state welding, including arc creation, melt pool formation, and the role of shielding gas. Various techniques such as shielded metal arc welding, MIG/MAG welding, TIG welding, and plasma arc welding are discussed. The lecture also delves into more advanced methods like laser and electron beam welding, as well as aluminothermic welding. Different welding processes, power and energy considerations, and the characteristics of different electrodes are explored in detail.

This video is available exclusively on Mediaspace for a restricted audience. Please log in to MediaSpace to access it if you have the necessary permissions.

Watch on Mediaspace

Official source

Ontological neighbourhood

Chemical engineering

Materials science: Welding

Related concepts (31)

Gas tungsten arc welding

Gas tungsten arc welding (GTAW), also known as tungsten inert gas (TIG) welding, is an arc welding process that uses a non-consumable tungsten electrode to produce the weld. The weld area and electrode are protected from oxidation or other atmospheric contamination by an inert shielding gas (argon or helium). A filler metal is normally used, though some welds, known as autogenous welds, or fusion welds do not require it. When helium is used, this is known as heliarc welding.

Welding

Welding is a fabrication process that joins materials, usually metals or thermoplastics, by using high heat to melt the parts together and allowing them to cool, causing fusion. Welding is distinct from lower temperature techniques such as brazing and soldering, which do not melt the base metal (parent metal). In addition to melting the base metal, a filler material is typically added to the joint to form a pool of molten material (the weld pool) that cools to form a joint that, based on weld configuration (butt, full penetration, fillet, etc.

Gas metal arc welding

Gas metal arc welding (GMAW), sometimes referred to by its subtypes metal inert gas (MIG) and metal active gas (MAG) is a welding process in which an electric arc forms between a consumable MIG wire electrode and the workpiece metal(s), which heats the workpiece metal(s), causing them to fuse (melt and join). Along with the wire electrode, a shielding gas feeds through the welding gun, which shields the process from atmospheric contamination. The process can be semi-automatic or automatic.

Arc welding

Arc welding is a welding process that is used to join metal to metal by using electricity to create enough heat to melt metal, and the melted metals, when cool, result in a binding of the metals. It is a type of welding that uses a welding power supply to create an electric arc between a metal stick ("electrode") and the base material to melt the metals at the point of contact. Arc welding power supplies can deliver either direct (DC) or alternating (AC) current to the work, while consumable or non-consumable electrodes are used.

Laser beam welding

Laser beam welding (LBW) is a welding technique used to join pieces of metal or thermoplastics through the use of a laser. The beam provides a concentrated heat source, allowing for narrow, deep welds and high welding rates. The process is frequently used in high volume and precision requiring applications using automation, as in the automotive and aeronautics industries. It is based on keyhole or penetration mode welding.

Related lectures (23)

Welding Techniques: Groove Thickness, Non-Destructive Testing, Defects, and Steel Quality

Discusses weld groove thickness, non-destructive testing, common defects, and steel quality in welding.

Structural Joints: Art and Engineering

Delves into the design and function of structural joints in steel and wood elements, showcasing historical examples of articulated bridges.

Networks: Capacities MOOC: Optimization: principles and algorithms - Network and discrete optimization

Covers the definition of flow quantities, capacities of cuts, and upper bounds on flow.

Metal Structures: Welding Assemblies

Covers the classification of joints in metal structures and resistance of welds.

Dendritic Growth: Microstructure in Metal Solidification