Question

Re-crystallization restores softness and ductility and decreases tensile strength. Question 7 Not yet answered Points out of 1.00 Select one: O True o False P Flag question Question 8 Hardness and strength in steel originate from the presence of Perlite (which contain iron and iron carbide) grains while ductility originates from ferrite grains. Not yet answered Points out of 1.00 Select one: O True O False Flag question Question 9 Not yet answered A fine grain structure (that can be achieved through a controlled heat treatment process such as normalizing) will result in higher toughness (resistance to shock loading or impact) compared to a coarse grain structure. Points out of 1.00 Select one: True O False Flag question Question 10 A heat treatment process followed by fast cooling (quenching) will result in the formation of a coarse needle-shape grain structure which is responsible for increased hardness and brittleness in a quenched metal. Not yet answered Points out of 1.00 Select one: o True O False Flag question

Please answer all questions, thank you.

Answer 1

SO Re-crystallization restores softness, nd ductility and decrease tensile, strength. an Aus! - True Иg i Hardness and strength in Steel originate from the presence of peolite ( which contain ison and iron carbide) Joan while ductility originates from ferrite grains, Aus- True - A bine grain structure (that can be achieved through a controlled heat treatment process such as normalizing will result in higher toughness (resistance to shock loading or impact) compared to coarse grain structure Ally! - parte poste false I A heat treatment process followed by tast cooling (quenching) will result in the formation of a coarse-needle shape grain structure which

18 responsible for increase hardness and brittleness in a quenched metal. Aus: - True Rambana