Answer:
Modulus of elasticity is dependent on the elemental constitution of 1080 steel and various heat treatment don't affect this elemental composition but only affects the mechanical properties(like strength , hardness, ductility, malleability) of the 1080 steel that are affected by plastic deformation of the 1080 steel
Step-by-step explanation:
Generally the underlying physical reason why when we conduct various heat treatments on 1018 steel we expect the modulus of elasticity to stay about the same for every heat treatment is
Modulus of elasticity is dependent on the elemental constitution of 1080 steel and various heat treatment don't affect this elemental composition but only affects the mechanical properties(like strength , hardness, ductility, malleability) of the 1080 steel that are affected by plastic deformation of the 1080 steel