When metal is being studied, it is to be noted that such is composed of varying types and microstructures with each having their own unique properties and tendencies. Talking about molten metal this time, metallurgical experts, who work on the thermal implications and activities of metal microstructures, found out on their microscopic studies that heat, when applied to metallic atoms, flows from hot to cold pattern always. In addition to that, a battery of molecular studies using high-powered microscopes revealed that warm atoms tend to move faster than the cold ones. Consequently, those restless atoms act in such a way that they continuously bumped and hit each other, thereby causing them to move and diffuse rapidly. Furthermore, metallurgical scientists found out that a conclusive fact should come into a generalization that the warmer the metal is, the faster the composite atoms of that said metal should be.

When an in-depth study was focused, meanwhile, on the internal affinity among the metal’s microstructures, it is said that certain bonds and linkages are present that facilitate the atoms in being in a constant puddle. Such mechanism, according to metallurgical specialists was necessary to prevent the metal atoms from vaporizing. However, further study proved that if those aforementioned metals just move rapid enough, meaning to say they should be thermally-charged high enough, they will still undergo evaporation process just like hydrogen and oxygen do when water boiling is being done. Going deeper to the specific of the water boiling mechanism, it is worth noting for that as the energy generated from the heat is conveyed to another part, then it is very much precise to say that the atoms give up energy, thereby decelerating and thermally fanned down. According to metallurgical microscopists, therefore, what is being evaporated is still very much water in the form of steam. Meanwhile, as the molten metal loses its heat, certain atomic forces and charges initiate to pull or transform the atoms into solid particles termed as nuclei. This will then take and attack on specific and recognizable crystal and metallic microstructures. Considering that the said nuclei possessed the metal microstructure, further atoms join and incorporate themselves within the nuclei. In consequence therefore, the nuclei gains size and hence, lead to the production of grains which in its orderly and organized form is coined as lattice. As the metal takes a solid form, however, the grains increase in size and magnitude. Such growth then paved the way for these microstructures to flourish on their own, which is tantamount to say that these regions of developing grains have to meet. When this phenomenon is reached, the meeting point will then serve as the eyewitness for the configuration of these metal microstructures to be disrupted. Having had postulated and proven this theory into a legitimate scientific fact, metallurgical microscopists and related experts tagged these areas as the grain boundary. These metallic fragments microscopic borderline forms a continuous matrix all throughout the entire length of the metal. Given a premise then that the metal is disrupted at the grain boundary, it is expected that the metal and its corresponding microstructures will act significantly different at the boundary locations.