Enhancing Fracture Resistance 

I have made a mistake in this video at 9:20. I say , and also write, that the ductile-to-brttle transition temperature increases with smaller grain size. This is incorrect. The correct statement is that the DBTT is lowered with decreasing grain size. Sorry for the confusion. I thank Ajith for pointing this out. Rajesh Prasad

Sir,, Your way to explain is extraordinary, even a beginner may understand easily ,,I request you to please start a MCQ series on the topics you had explained.

8:51 Carburisation can make surface harder. How does it resist crack? and are compressive streese introduced due to strain created by these carbon atoms?

Sir viewing your valuable videos very interested & informative. Please tell about soaking time for Aluminium Circles after annealing in furnace. Await your reply

Hi sir one que. Is why FCC structure offers more resistance to creep..?

Just wanted to ask one query... The way you teach fracture resistance feels that Increasing ductility(decreasing brittleness) is equivalent to increasing fracture resistance... Is this always a case... If this was case then Why a brittle material can't have good fracture resistance

1). In what way increase in DBTT favoured? 2).Fine grains leads to high DBTT or low DBTT??