Internal structural characteristics of actual metal materials

The internal structure of the metal.

In the scientific and technological newspapers of the 90s of the 20th century, the terms "nanomaterials" and "nanotechnology" often appeared. What are "nanomaterials"? In layman's terms, it is a material composed of extremely tiny particles with a size of only a few nanometers.

1 nanometer is 1 billionth of a meter, which is not visible to the naked eye. However, materials composed of nanoparticles have many specific properties. Therefore, scientists call them "ultra-particle" materials and "new materials of the 21st century".

And nanomaterials are not entirely recent. The most primitive nanomaterials appeared in China in the 12th century BC, that is, one of the four treasures of China's study - ink, and an important ingredient in ink is smoke. In fact, smoke is formed from many ultra-fine carbon blacks, and the process of making smoke and ink involves so-called nanotechnology.

The internal structure of the actual metal material is generally polycrystalline, and the atoms in each grain are arranged in an orderly manner (body-centered cube, face-centered cube, close-packed hexagonal, etc.).

In my own words, a metal material is arranged by metal atoms according to a certain law, which determines the physical properties of the metal material, including elastoplasticity, fatigue properties, solid-liquid existence state, metal hardness, and so on.

The internal structure of metals is similar to that of cells.

1. Most intermetallic compounds do not comply with the atomic valence rule. For example, there are three intermetallic compounds in the Cu-Zn alloy system: Cuzn, Cu5Zn8, and Cuzn3. Obviously, none of these three compounds meet the rules of valency.

2. The composition of most intermetallic compounds is not determined, that is, the ratio of the atoms of each component in the compound is not a definite value, but can be changed more or less within a certain range. For example, the ratio of Cu to Zn atoms (Cu Zn) in a Cuzn compound can vary from 36% to 55%.

3. The binding bonds between atoms are often not a single type of bonds, but mixed bonds, that is, ionic bonds, covalent bonds, metallic bonds, and even molecular bonds (van der Waals force) coexist. But the bonds that are dominant are also different for different compounds.

4. Due to the existence of Lichang Shenzi bond or covalent bond, the intermetallic bent branches are often hard and brittle resistant (high strength and poor plasticity). However, due to the presence of metal bond components, it also has more or less metallic properties (such as certain plasticity, conductivity and metallic luster, etc.).

5. The structure of intermetallic compounds is determined by many factors such as atomic valence, electron concentration, atomic (or ionic) radius, etc.

Summary. Hello, dear. The answer you are asking (what is the internal structure of metal and aluminum alloys) for you is as follows:

Aluminum-manganese, aluminum-magnesium, aluminum-magnesium-copper, aluminum-magnesium-silicon-copper, aluminum-zinc-magnesium-copper and other alloys. Deformed aluminum alloy, also known as cooked aluminum alloy, is divided into five types: anti-rust aluminum, duralumin, super duralumin, forged aluminum and special aluminum according to its composition and performance characteristics.

Aluminum alloy is made of pure aluminum with some alloying elements, such as aluminum-manganese alloy, aluminum-copper alloy, aluminum-copper-magnesium duralumin alloy, aluminum-zinc-magnesium-copper super-duralumin alloy. Aluminum alloy has better physical and mechanical properties than pure aluminum: easy processing, high durability, wide range of application, good decorative effect, and rich colors.

Aluminum alloy is divided into anti-rust aluminum, duralumin, super duralumin and other types, each of which has its own scope of use and has its own code for users to choose.

What is the internal structure of metal and aluminum alloys?

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Hello, dear. The answer you are asking (what is the internal structure of metal and aluminum alloys) for you is as follows: alloys such as aluminum-manganese, aluminum-magnesium, aluminum-magnesium-copper, aluminum-magnesium-silicon-copper, aluminum-zinc-magnesium-copper, etc.

Deformed aluminum alloy, also known as cooked aluminum alloy, is divided into five types: anti-rust aluminum, duralumin, super duralumin, forged aluminum and special aluminum according to its composition and performance characteristics. Aluminum alloy is made of pure aluminum with some alloying elements, such as aluminum-manganese alloy, aluminum-copper alloy, aluminum-copper-magnesium duralumin alloy, aluminum-zinc spike lead-magnesium-copper super-hard aluminum alloy. Aluminum alloy has better physical and mechanical properties than pure aluminum

Easy to process, high durability, wide range of application, good decorative effect, rich colors. Aluminum alloy is divided into anti-rust aluminum, duralumin, super duralumin and other types, each of which has its own scope of use, and the inspector has its own code for users to choose.

Hopefully, the answers provided will help you<>

The structural hierarchy of civil engineering materials is divided into 3 layers:

1. Microstructure.

The morphological features that need to be resolved by high-powered electron microscopy but cannot be distinguished by the naked eye belong to the microstructure, which mainly refers to the material size from microns to the minus 10 power. For example: the geometry and accumulation of gypsum crystal particles.

2. Mesoscopic structure.

The morphological features that need to be resolved by optical microscopy belong to the mesoscopic structure, which is generally a compound or object with an equal size of millimeters to microns. For example: the cells of wood, the morphology of steel, etc.

3. Macro structure.

The morphological features and structural morphology that can be distinguished by the naked eye belong to the macroscopic structure, which generally refers to the geometric shape, distribution mode and morphological characteristics of larger particles with a size of more than millimeters. For example: the geometry and distribution of aggregates in concrete; Rings of wood, etc.

The properties of metal materials are divided into four aspects:

1. Physical properties: melting point, density, coefficient of expansion, thermal conductivity, magnetic conductivity, electrical conductivity, etc.

2. Chemical properties: corrosion resistance, oxidation resistance, chemical stability, etc.

3. Mechanical properties: hardness, strength, plasticity, toughness, fatigue, etc. 4. Process properties: casting, forging, welding, machinability, heat treatment performance, etc.

According to the Shenzhen silver paste market, in all application materials, all the metal elements or metal elements are mainly formed, and have general metal characteristics of the material is commonly known as gold chip material, it is a large category of materials, is one of the extremely important material bases for the development of human society.

Metal materials, especially steel, can play such an important role in human civilization, on the one hand, because it has far superior comprehensive properties than other materials, such as physical properties, chemical properties, mechanical properties, and process properties, so that it can adapt to the different requirements of science and technology and people's lives; On the other hand, it is constantly being able to update and develop in line with the ever-increasing demands on a variety of requirements, thanks to the enormous potential in terms of performance and quantity and quality, which can be exploited at any time.

Shenzhen silver paste market said that metal materials from smelting to the use of manufacturing devices, need to go through a series of processes such as casting, pressure processing, machining, heat treatment and riveting, whether it can adapt to the requirements of these processes, and the degree of adaptation, is an important factor that determines whether it can be produced or how to produce. The ability of gold chip materials to adapt to the requirements of the actual production process is collectively referred to as process performance, such as shackleness, tin, deep drawing, bending, cutting weather, bonding, hardenability, etc. Although this kind of property is inherent in the metal material itself, how to test and express it, and what is its physical essence' This is a complex problem, because this kind of performance is often determined by the comprehensive action of several parametric variables (including physical, chemical, and mechanical).

For example, the so-called casting performance is not only related to the melting point and strength of gold chips and the expansion coefficient of liquid and solid states, but also related to the chemical interaction between the liquid state and its surrounding medium and the physical properties of the resulting chemical products. Therefore, in engineering, the casting performance is expressed by combining specific so-called fluidity, filling, solidification shrinkage, and hot crackability. Other process properties are similarly treated.

Shenzhen silver paste market said that in order to carry out the first or compare and for the sake of convenience, the project mostly uses the method of simulation experiment, that is, simulating the actual production conditions and designing a set of experimental equipment, measuring the specified set of numerical indicators, which is used as a standard for judging the performance of the process. What is commonly referred to as process performance refers to these numerical indicators. Strictly speaking, it can only reflect the actual process performance of the material itself in the specific production process to a certain extent or approximately, but it is widely used because of its practical value and the convenience of testing.

Among the composite materials, fiber reinforced materials are the most widely used and the largest amount. It is characterized by small specific gravity, high specific strength and specific modulus. For example, the material of carbon fiber and epoxy resin composite has several times greater specific strength and specific modulus than steel and aluminum alloy, and also has excellent chemical stability, friction and wear resistance, self-lubrication, heat resistance, fatigue resistance, creep resistance, sound reduction, electrical insulation and other properties.

Graphite fibers are compounded with resin to obtain a material with a coefficient of thermal expansion equal to almost zero. Another characteristic of fiber reinforced materials is anisotropy, so the arrangement of fibers can be designed according to the strength requirements of different parts of the workpiece. Aluminium matrix composites reinforced with carbon and silicon carbide fibers retain sufficient strength and modulus at 500.

Silicon carbide fiber is compounded with titanium, which not only improves the heat resistance of titanium, but also resists wear, and can be used as engine fan blades. Silicon carbide fiber is composite with ceramic, and the service temperature can reach 1500 °C, which is much higher than the service temperature of superalloy turbine blades (1100 °C). Carbon fiber-reinforced carbon, graphite fiber-reinforced carbon, or graphite fiber-reinforced graphite, which constitute ablation-resistant materials, have been used in spacecraft, rocket missiles, and atomic energy reactors.

Due to their low density, non-metallic matrix composites can reduce weight, increase speed and save energy when used in automobiles and aircraft. Composite leaf springs made of a mixture of carbon fiber and glass fiber have the same stiffness and load-bearing capacity as steel leaf springs, which weigh more than 5 times more.