Answer :
Final answer:
Fusion welding processes include electrogas welding, electron-beam welding, and laser-beam welding, hence the correct answer is A) electrogas welding, B) electron-beam welding and E) laser- beam welding.
Explanation:
Within the realm of welding, various processes are utilized to join metal materials through the application of heat and sometimes pressure. Among the commonly known welding processes, fusion welding refers to methods that melt the base metals to create a homogeneous joint. When considering options A through F provided in the question, the processes classified as fusion welding are:
- Electrogas welding (A) - This process uses an electric arc and shielding gas to weld thick materials, fusing them together.
- Electron-beam welding (B) - This is a fusion welding process that utilizes a high-velocity electron beam to produce a weld joint by melting the base metals.
- Laser-beam welding (E) - In this process, a laser is used to melt the material, and a fine weld joint is created as the melted material cools and solidifies.
Meanwhile, explosion welding (C), forge welding (D), and ultrasonic welding (F) involve different mechanisms and are not classified as fusion welding. Explosion welding uses a controlled explosive detonation to create a bond, forge welding involves hammering or pressing the workpieces together usually at high temperatures but below the melting point, and ultrasonic welding creates a bond through high-frequency ultrasonic acoustic vibrations.
