Question

Physics of Welding

•Fusion most common means of achieving coalescence in welding
a. True
b. False

•To accomplish fusion, a source of high density heat energy must be supplied to surfaces, so resulting temperatures cause localized melting of base metals (and filler metal, if used)
a. True
b. False

•For metallurgical reasons, desirable to melt metal with minimum energy but high heat densities.
a. True
b. False

Answer 1

Fusion is the most common method in welding to join metals, requiring high-density heat to melt materials. It is true that for metallurgical reasons, achieving melting with minimum energy but high heat density is desirable. All the given statements are true (option a).

Step-by-step explanation:

The student asked whether fusions is the most common means of achieving coalescence in welding, if a source of high-density heat energy must be supplied to achieve fusion, and for metallurgical reasons, whether it is desirable to melt metal with minimum energy but high heat densities. To provide a detailed answer:

1. Fusion is indeed the most common means of achieving coalescence in welding. This is true.

2. To accomplish fusion in welding, a source of high-density heat energy must be supplied to the surfaces of the base metals (and filler metal if used), resulting in localized melting necessary for the process. This statement is true.

3. For metallurgical reasons, it is indeed desirable to melt metal with the minimum amount of energy while employing high heat densities to promote strong, durable welds with less distortion and other defects. This is also true.

Hence, the answer is option a.