Interpretation:
The reason for low-carbon carbon steels having high strength of heat affected zones needs to be explained and the role of retained austenite in this case needs to be determined.
Concept introduction:
The heat-affected zone (HAZ) is defined as the area of region of base material, either a thermoplastic or a metal, which isn't melted however has had its microstructure and properties modified by intensive heat cutting tasks or welding. Mild steel is only iron containing a little level of carbon. They are tough and solid yet not promptly tempered. They are otherwise called plain-carbon steel and low-carbon steel. It is presently the most widely recognized type of steel since its cost is generally low while it gives material properties that are worthy for many applications. Mild steel contains roughly
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