How does grain size affect metal properties? How to refine grain?

Crystal definition. Why is chemistry and physics different?

Chemistry is defined from a microscopic point of view (ordered), and physics from a macroscopic point of view (constant melting point).
They are different definitions of the same class of matter and are essentially the same.
It is because the internal particles are periodically arranged repeatedly in three-dimensional space that the crystal has a constant melting point

RELATED INFORMATIONS

1. Is NaCl crystal melting a physical or chemical change from a bond point of view? The angle of a bond: the breaking of an old bond and the formation of a new bond are called chemical reactions The angle of a bond: the breaking of an old bond and the formation of a new bond are called chemical reactions NaCl = Na ++ Cl - The ionic bond has broken, but is there any bond?
2. Is weathering chemical or physical I'm confused! It seems to me that under what circumstances is a physical change, in another case is a chemical change! What the hell is going on! Tell me more about the quilt! Is weathering chemical or physical I'm confused! It seems to me that under what circumstances is a physical change, in another case is a chemical change! What the hell is going on! Tell me more about being!
3. Is the weathering of alkali chemical or physical change?
4. Why is sodium carbonate crystal weathering not a physical change?
5. What is the change of white crystal on the surface of dried pickles
6. If the pickle is left in the air, after a period of time it is found that a layer of white crystal precipitates on the surface of the pickle. The main component of this white crystal is () A. NaCl B. Na2CO3 C. NaHCO3 D. NaNO3
7. What's the difference between powder and flour? Mainly explained from raw materials and processing What's the difference between flour and flour? Mainly explained from raw materials and processing
8. A Decision Theorem to Prove the Parallelism of Lines and Surfaces in Space
9. What is the driving force for recovery and recrystallization of deformed metals during heating?
10. Heat a metal can containing wat on an alcohol lamp, boiling that wat, tightening the can lid, cooling the metal can,
11. How does grain size affect the mechanical properties of metals Why How does grain size affect the mechanical properties of metals
12. Is the solution after precipitation of crystals a saturated solution of a substance? Doesn't the saturated solution have crystal precipitation after cooling?
13. Is it certain that crystals will precipitate from saturated solution? What is the relationship between the quality of precipitated crystals and solubility?
14. Similarities and differences between stopping heating when a large amount of crystals are precipitated during evaporation and... Such as title Similarities and differences between stopping heating when a large number of crystals are precipitated during evaporation and... Such as title
15. Why does crystal precipitate in the evaporating dish and a small amount of liquid remain?
16. The crystals precipitated from saturated solution must be unsaturated solution? What happens when saturated solution cools down? What happens when the unsaturated solution heats up? When will crystals precipitate? Does the saturated solution precipitate crystals when heated? Crystals precipitated from saturated solution must be unsaturated solution? What happens when saturated solution cools down? What happens when the unsaturated solution heats up? When will crystals precipitate? Does the saturated solution precipitate crystals when heated?
17. How do you know if the solution is cooled or heated?
18. Is it certain that crystals will precipitate when the saturated solution cools down? Must the solution of the precipitated crystals be a saturated solution of the solute at this temperature? Tell me the reason. Is it certain that crystals will precipitate when the saturated solution cools down? Must crystals precipitate when saturated solution cools down? Must the solution of the precipitated crystals be a saturated solution of the solute at this temperature? Tell me the reason. Must crystals precipitate when saturated solution cools down?
19. Saturated solution. Crystallization occurs when the solution is heated or cooled.
20. About Crystals and Crystals What is the point in the chemical formula? I haven't learned anything about crystals. Can you tell me more about them? Such as basic cop carbonate and copper carbonate, copper hydroxide,