Porosity is a cavity-like discontinuity and occurs due to the entrapment of gases in the molten weld pool. These entrapped gases don't get a chance to escape from the molten weld pool and hence cause porosity.
<h3>Which discontinuities are caused during welding?</h3>
Weld discontinuities can be defined as "an interruption of the typical structure of a weld, such as a lack of homogeneity in the mechanical, metallurgical or physical characteristics of the weld." Porosity is considered to be the most critical discontinuity. Weld discontinuities include porosity, incomplete fusion, excessive melt.
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Answer: c: create equality within a society.
Explanation: I just answered the question on e2020 :))
Answer:
in order to develop a nation . all type of human resources are needed
.................by regarding it as a collection of RESOURCES,...................
Resources refers to the substances found in the environments which are useful to the people economically and technologically; it is also socially acceptable for use by the people. Resources can be found in diverse places, such as in the ground, in the water and on the land.
