From the perspective of various factors that affect strength, what are the four most common strength

The solute atoms dissolved into the solid solution cause lattice distortion, which increases the resistance of dislocation motion and makes it difficult to carry out the slip, so that the strength and hardness of the alloy solid solution increase. This phenomenon of strengthening metals by dissolving into a certain solute element to form a solid solution is called solution strengthening. When the concentration of solute atoms is appropriate, the strength and hardness of the material can be increased, while its toughness and plasticity are reduced.

3.Influencing factors.

The higher the atomic fraction of the solute atom, the greater the strengthening effect, especially when the atomic fraction is very low.

The greater the difference in the atomic size between the solute atom and the base metal, the greater the strengthening effect.

The interstitial solute atoms have a greater solution strengthening effect than the displacement atoms, and the lattice distortion of the interstitial atoms in the body-centered cubic crystal is asymmetric, so its strengthening effect is greater than that of the face-centered cubic crystal. However, the solid solubility of interstitial atoms is very limited, so the actual strengthening effect is also limited.

The greater the difference between the number of valence electrons between the solute atom and the matrix metal, the more obvious the solution strengthening effect is, that is, the yield strength of the solid solution increases with the increase of valence electron concentration.

4.The degree of solution strengthening depends mainly on the following factors.

The difference in size between the matrix atom and the solute atom. The greater the size difference, the greater the disturbance to the original crystal structure and the more difficult it is for the dislocation to slip.

The amount of alloying elements. The more alloying elements you add, the greater the strengthening effect. If too many atoms that are too big or too small are added, the solubility will be exceeded. This involves another strengthening mechanism, dispersion phase strengthening.

The interstitial solute atom has a greater solution strengthening effect than the displacement atom.

The greater the difference between the valence electron number of solute atoms and the base metal, the more significant the solution strengthening effect.

5.Effect.

The yield strength, tensile strength and hardness are all stronger than those of pure metals;

In most cases, ductility is lower than that of pure metals;

The electrical conductivity is much lower than that of pure metals;

Creep resistance, or loss of strength at high temperatures, can be improved by solution strengthening. Work hardening 1Definition.

With the increase of cold deformation, the strength and hardness of metal materials increase, but the plasticity and toughness decrease.

Yield strength: It is the yield limit of the metal material when the yield phenomenon occurs, that is, the stress that resists the slight plastic deformation. For metal materials without obvious yield, the stress value that produces the residual deformation is specified as its yield limit, which is called the conditional yield limit or yield strength.

External forces greater than this limit will cause the parts to fail permanently and cannot be recovered. For example, the yield limit of mild steel is 207MPa, when the external force greater than this limit acts, the parts will produce permanent deformation, less than this, the parts will return to their original appearance.

But it reminds me all the time and deletes it in the calendar.

From the perspective of various factors that affect the intensity, the most common strengthening method, the strengthening method, is to improve some of your own strengthening abilities from your own point of view.

From the various factors that affect the strength, what are the most common strengthening methods of Kang? It must be an accumulation of one's own knowledge.

From the perspective of various factors that affect the intensity, the most common reinforcement method is repetition, or continuous review can strengthen memory.

Types of reinforcement theories: according to the nature and purpose of reinforcement, they are divided into: positive reinforcement, negative reinforcement, punishment, and natural extinction.

Reinforcement theory states that reinforcement refers to the positive or negative consequences (reward or punishment) of an action and the degree to which it affects whether the behavior is repeated or not. If an act is regularly rewarded, it is more likely to recur.

The role of reinforcement theory:Ideological poverty often stems from theoretical poverty, and theoretical poverty is often the result of not learning. In the face of the new situation, the majority of party members and cadres must fully understand that strengthening theoretical study is the need to improve the political quality of party members and cadres; It is a realistic topic that keeps pace with the times and innovates and develops; It is an objective requirement for self-improvement and quality improvement.

Theoretical maturity is a sign of the maturity of a political party and a sign of the maturity of a party member and cadre.

Ways to strengthen include:

1. Solid solution strengthening: integrated into solid solution.

The solute atoms in cause lattice distortion, and the lattice distortion increases the dislocation.

The resistance of the movement makes it difficult to carry out the slip, so that the strength and hardness of the alloy solid solution increase.

2. Fine-grained strengthening: refers to the method of improving the mechanical properties of metal materials by refining the grains of the scattered beam skin, and the strength of the material will be improved by refining the grains in the industry.

3. Dislocation strengthening: It is one of the most effective strengthening methods in metal materials. In metals that are prone to cross-slip, the dislocations will be arranged into three-dimensional substructures after the strain exceeds a certain level, and the impulse is called when the dislocation walls of these substructures are loosely tangled"Cellular structure"。

4. Work hardening: the phenomenon that the strength and hardness of metal materials increase when they are plastically deformed below the recrystallization temperature, while the plasticity and toughness decrease.

5. Second phase intensification: It means that when the second phase is evenly distributed with fine and diffuse particles.

In the matrix phase, it will have a significant strengthening effect.

6. Side-dispersion strengthening of slag: refers to a means of strengthening a material by adding hard particles to a uniform material.

One of the reinforcing factors is environmental support. The reinforcing factor in the diagnosis of health education refers to the social conditions necessary for the formation of a certain type of behavior.

The core of health education is to educate people to establish health awareness, urge people to change unhealthy behaviors and lifestyles, and develop good behaviors and lifestyles to reduce or eliminate risk factors that affect health. Through health education, people can understand which behaviors affect their health and can consciously choose healthy behaviors and lifestyles.