Explain briefly in words The room temperature yield strength

Explain briefly in words. The room temperature yield strength of a pure metal that is heat-treated such that the grain size of the material increases from 10 microns to 40 microns will decrease by a factor of 2-why?

Solution

The Metallic material consists of a microstructure of small Crystals called grains, normally, in atoms is grouped into very specific arrangement called lattice, it rearrangement depending on the factors of pressure and temperature.

All metals is basically depends on the below factors:-

The specific composition of alloy will great effect by heat treatment, during melting of metals the microstructure phase changes i.e. eutectoid, eutectic & other.

During Melting, the grain size expand to fill the cavity of the metal, the physical and chemical properties being changed.

Secondly cooling is important case of expanded of material