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. China became a global powerhouse
Explanation:
Deng Xiaoping took over after Mao passed away and since then China has come to be known as one of the largest economies of the world with tremendous global political power and a rapidly improving military.
Answer:
Nepal is rich in geographical diversity which makes it rich in cultural diversity as well. The culture of people living in mountains and the culture of people living in the valleys are different. ... People of different castes and groups participate in each others festivals and functions.Nepal is a place of different religions, different races, and different castes. It has a rich cultural history because of Nepal's vast diversity which has reflected our unique culture. ... All these caste groups are unique in themselves with their distinct cultural rites, rituals, songs, dances, customs and cuisines.
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