Materials and Heat Treatments Quiz

What is the purpose of metal hardening?

• To reduce the durability of the material

• To decrease the level of hardness

• To improve mechanical properties and increase hardness

• To make the material softer

What is the primary goal of solution annealing in precipitation hardening?

• To increase the brittleness of the material

• To lower the corrosion resistance

• To transform inhomogeneities into homogeneities

• To decrease the yield strength of the material

What is the purpose of quenching in precipitation hardening?

• To relieve the brittleness of fully hardened steels

• To increase the stresses induced by quenching

• To heat the material to the suitable temperature for hardening

• To cool the material rapidly to transform it to a fully hardened structure

What is the purpose of ageing in precipitation hardening?

• To decrease the yield strength of the material

• To transform the oversaturated solid solution into two-phase alloys

• To increase the brittleness of the material

• To transform inhomogeneities into homogeneities

What is the primary purpose of tempering?

• To lower the hardness to within a specified range

• To decrease the strength and toughness of the material

• To increase the brittleness of the material

• To transform inhomogeneities into homogeneities

What is the primary purpose of annealing?

• To make the material softer and more workable

• To increase the wear and damage to tools and machinery

• To increase the brittleness of the material

• To decrease the risk of material fracture, cracking, and distortion

What is the purpose of case hardening?

• To produce a product that is much harder

• To decrease the strength of the material

• To increase the brittleness of the material

• To make the material softer

What is the purpose of precipitation hardening?

• To decrease the yield strength and corrosion resistance

• To improve the mechanical properties and corrosion resistance

• To increase the brittleness of the material

• To lower the hardness and strength of the material

What is the purpose of case hardening after the formation of the component into its final form?

• To avoid weakening of the iron

• To decrease the strength of the material

• To increase the brittleness of the material

• To make the material softer

What is the purpose of quenching agents in precipitation hardening?

• To increase the brittleness of the material

• To prevent alloys from discharging

• To decrease the strength and toughness of the material

• To transform inhomogeneities into homogeneities