Also known as ?auto crack,? resulting from stress concentration in relatively thin weld metal that is last to freeze. Both root cracks and crater cracks are forms of hot cracking.
Corrosionpedia – What is a Hot Cracking? – Definition from Corrosionpedia
What is hot cracking (solidification cracking)? – TWI
Hot Crack – an overview | ScienceDirect Topics
Hot Crack: How it occurs and how it can be prevented – Welding Engineers NZ