Question: Qest1. By Drawing a typical continuous cooling diagram of steels (i.e. time-temperature- transformation diagram), briefly explain: 1-a) What are the conditions required to create

Qest1. By Drawing a typical continuous cooling diagram of steels (i.e. time-temperature-

Qest1. By Drawing a typical continuous cooling diagram of steels (i.e. time-temperature- transformation diagram), briefly explain: 1-a) What are the conditions required to create each one of the following microstructures by continuous cooling from austenite temperature. (4 marks) 1-b) What are the influences of alloying elements (i.e. austenite stabilizers and ferrite stabilizers) on the formation of each one of the following microstructures. (4 marks) 1-c) For heat treatment of large components what type of microstructure is preferred and what are the influence of the alloying elements on the formation of such microstructure. (4 marks) Pearlite Formation y grain Fe,C Ferrite Upper Bainite Formation C rich y Lower Bainite Formation Nucleation Growth Appearance

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