Question

Loss of toughness in weld and heat affected zone called as 

 1. Reheat cracking 

 3. Weld distortion

 4. Weld decay

 5. Embrittlement

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Answer 1

reheat cracking  is called as loss of toughness in weld and heat affected.

Answer 2

‘Loss of toughness’ in weld and ‘heat affected zone’ called as reheat cracking.

Option: (1)

Explanation:  

• Welding is a property of some metals by which when they are heated two or more pieces of the same metal get attached to each other without using an addition metal or other such metals.  

• When the metal is excessively heated it loses the toughness of the tensile strength and the welding capacity of the metal is lost.

• This portion of the metal when there is loss in the welding property due to excessive heating is known as the reheat cracking of the metal.