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The major difficulty during welding of aluminium is due to its
- a)high tendency of oxidation
- b)high thermal conductivity
- c)low melting point
- d)low density
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
The major difficulty during welding of aluminium is due to itsa)high t...
Explanation:
Aluminium is a highly reactive metal, and it has a high affinity to form oxide layers on its surface. This oxide layer makes the welding of aluminium a challenging task. The oxide layer on the surface of aluminium prevents the welding process by interfering with the formation of a strong metallurgical bond between the two metal pieces being joined. The oxide layer also makes welding of aluminium difficult due to the following reasons:
High tendency of oxidation
Aluminium has a high tendency to oxidize, and this oxide layer is very stable and difficult to remove. The oxide layer formed on the surface of aluminium is very thin, and it is difficult to see with the naked eye. The presence of this oxide layer can prevent proper bonding of the two metal pieces being welded, leading to weak welds. Therefore, the oxide layer on the surface of aluminium needs to be removed before welding.
High thermal conductivity
Aluminium has a very high thermal conductivity compared to other metals, which makes it difficult to weld. The high thermal conductivity of aluminium causes rapid heat dissipation, which makes it difficult to maintain the high temperature required for welding. This rapid heat dissipation can also lead to the formation of cracks and other defects in the weld.
Low melting point
Aluminium has a low melting point compared to other metals, which makes it easy to melt during welding. This low melting point can lead to the formation of a weak weld, which can easily break under stress.
Low density
Aluminium has a low density compared to other metals, which makes it difficult to weld. The low density of aluminium makes it difficult to apply the required amount of heat to the metal during welding, which can lead to weak welds.
Conclusion:
Therefore, the major difficulty during welding of aluminium is due to its high tendency of oxidation. The oxide layer on the surface of aluminium prevents proper bonding of the two metal pieces being welded, leading to weak welds. Hence, it is essential to remove the oxide layer before welding.
Aluminium is a highly reactive metal, and it has a high affinity to form oxide layers on its surface. This oxide layer makes the welding of aluminium a challenging task. The oxide layer on the surface of aluminium prevents the welding process by interfering with the formation of a strong metallurgical bond between the two metal pieces being joined. The oxide layer also makes welding of aluminium difficult due to the following reasons:
High tendency of oxidation
Aluminium has a high tendency to oxidize, and this oxide layer is very stable and difficult to remove. The oxide layer formed on the surface of aluminium is very thin, and it is difficult to see with the naked eye. The presence of this oxide layer can prevent proper bonding of the two metal pieces being welded, leading to weak welds. Therefore, the oxide layer on the surface of aluminium needs to be removed before welding.
High thermal conductivity
Aluminium has a very high thermal conductivity compared to other metals, which makes it difficult to weld. The high thermal conductivity of aluminium causes rapid heat dissipation, which makes it difficult to maintain the high temperature required for welding. This rapid heat dissipation can also lead to the formation of cracks and other defects in the weld.
Low melting point
Aluminium has a low melting point compared to other metals, which makes it easy to melt during welding. This low melting point can lead to the formation of a weak weld, which can easily break under stress.
Low density
Aluminium has a low density compared to other metals, which makes it difficult to weld. The low density of aluminium makes it difficult to apply the required amount of heat to the metal during welding, which can lead to weak welds.
Conclusion:
Therefore, the major difficulty during welding of aluminium is due to its high tendency of oxidation. The oxide layer on the surface of aluminium prevents proper bonding of the two metal pieces being welded, leading to weak welds. Hence, it is essential to remove the oxide layer before welding.
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The major difficulty during welding of aluminium is due to itsa)high tendency of oxidationb)high thermal conductivityc)low melting pointd)low densityCorrect answer is option 'A'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about The major difficulty during welding of aluminium is due to itsa)high tendency of oxidationb)high thermal conductivityc)low melting pointd)low densityCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The major difficulty during welding of aluminium is due to itsa)high tendency of oxidationb)high thermal conductivityc)low melting pointd)low densityCorrect answer is option 'A'. Can you explain this answer?.
The major difficulty during welding of aluminium is due to itsa)high tendency of oxidationb)high thermal conductivityc)low melting pointd)low densityCorrect answer is option 'A'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about The major difficulty during welding of aluminium is due to itsa)high tendency of oxidationb)high thermal conductivityc)low melting pointd)low densityCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The major difficulty during welding of aluminium is due to itsa)high tendency of oxidationb)high thermal conductivityc)low melting pointd)low densityCorrect answer is option 'A'. Can you explain this answer?.
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