What alloy materials are aviation equipment made of?

Aluminum-lithium alloy, a new type of aviation material.

New materials are an important foundation of aerospace technology, and the development of aerospace technology constantly puts forward new problems and requirements for materials science. Aluminum-lithium alloy is one of the most rapidly developing fields of aviation metal materials in the past ten years.

Lithium is the lightest metallic element in the world. Lithium metal is added to the metal aluminum as an alloying element to form an aluminum-lithium alloy. The addition of lithium metal can reduce the density of the alloy and increase the stiffness, while still maintaining high strength, good corrosion and fatigue resistance, and suitable ductility.

Because of these properties, this new alloy has attracted a lot of attention from the aviation, aerospace and marine industries. It is precisely because of the many advantages of this alloy that many scientists have been attracted to study it, and the development of aluminum-lithium alloys has sprung up like mushrooms after a rain.

In 1983, at the Paris International Aviation Exposition, the world's two largest aluminum alloy manufacturers, Alcon Aluminium in the United Kingdom and Alcow Aluminium in the United States, announced the successful development of a new revolutionary material - aluminum-lithium alloy. Experts believe that aluminum-lithium alloy is another milestone in the research and development of aluminum alloy since the invention of aluminum-zinc high-strength alloy in 1943.

In fact, aluminum-lithium alloy is not a new concept. The recognition of this material has gone through quite a long time. Due to its low density and high solubility in aluminum, lithium has long been regarded as a close partner of aluminum.

As early as the 20s of the last century, scientific and technological workers made many comments on aluminum-lithium alloys. In 1924, Germany successfully developed an industrial aluminum-lithium alloy - Sikron. This is an aluminum-zinc alloy that contains only lithium.

Its mechanical properties were slightly better than the aluminum-magnesium alloy that prevailed at that time - dura aluminum. Since Dula aluminum was already recognized at that time, it affected the wide attention that Sikron alloys should receive. In 1943, the high-strength aluminum-zinc-magnesium-copper alloy came out, once again underestimating the industrial value of aluminum-lithium alloy.

In 1957, the UK successfully developed X 2020 aluminum alloy containing lithium. This alloy is used on the skin of the wings and horizontal tail of American carrier-based supersonic attack aircraft, and after replacing the aluminum alloy in the original design, the weight of the RA-5C aircraft is reduced by 6%. Scientists and technologists in the former Soviet Union also developed an aluminum alloy containing 2% lithium.

After another 10 years of wandering, after the worldwide energy crisis occurred in 1967, countries began to study aluminum-lithium alloys on a large scale again. Due to the development of metallurgical technology and related technologies, the emergence of aluminum-lithium alloys with greater lithium content, lower density and higher strength has been made possible. It is believed that this alloy is used in many of today's advanced fighter jets and civil aircraft.

The cost of aluminum-lithium alloys is only about 1 10 of carbon fiber reinforced plastics. If Boeing aircraft are made of aluminum-lithium alloys, the weight can be reduced, fuel savings, aircraft costs will fall, and the annual flight cost per aircraft will be reduced. It can be expected that with the development of materials science, more and more new alloys will enter the aerospace industry, various industrial sectors and thousands of households.

The best thing to use is titanium!

The materials on the aircraft are mostly alloy materials. The main ones are as follows. 1. Aluminum alloy.

Aluminum is a light metal with a specific gravity of around the world. Due to the attraction of the earth, the lighter the mass of the aircraft, the better. The lighter the plane, the higher, faster, and farther it flies, and the greater the load.

But the strength of aluminum is low, fortunately, the plane is not a tractor, it flies in the air and will not touch other objects, so most of the skin of the aircraft is pressed with aluminum alloy, as well as the front receiver, aircraft frame, ribs, etc. Aluminum alloy materials account for about 50%-70% of aircraft materials. 2. Magnesium alloy.

Magnesium is lighter than aluminum, with a specific gravity of about 300 degrees and a melting point of about 300 degrees. Less intense. It is used to manufacture non-load-bearing parts and housings.

For example, various valve housings, oil pump housings, etc. Magnesium alloy materials account for about 5%-10% of aircraft materials. 3. Titanium alloy.

Titanium is also a light metal, the specific gravity is about about, heavier than aluminum, but the strength is very high, very high temperature resistance, melting point more than 1660 degrees, titanium is an ideal material for building aircraft, aircraft engines, bulletproof parts, strengthening parts, reinforcement parts, combustion chambers, turbine shafts, turbine disks, nozzles, etc., most of them are made of titanium alloy materials. In modern aircraft, the proportion of titanium alloy is increasing. 4. Tweezers, molybdenum-tungsten alloy.

It is an ideal material for making engines. The temperature of aircraft engines can reach more than 2000 degrees. Ordinary materials are not good.

Only titanium-tungsten-molybdenum alloys are competent. When an aircraft engine is mounted on an aircraft, it is insulated with asbestos cloth, which is a good thermal insulation material. Make asbestos into a board or make a cloth to wrap the engine.

Developed countries use reinforced gypsum and ceramics as thermal insulation materials. China has used composite materials for thermal insulation (a layer of seed decoration powder, a layer of titanium tungsten alloy plate pressed forming materials).

What materials are aviation planes made of? They are made of anti-fatigue composite materials, because political materials can reduce the weight of the aircraft when used in aircraft.

The main structure of the aircraft is generally made of materials with the lightest weight under the condition of sufficient strength, and the earliest aircraft is wooden, and the aircraft was slow during World War I and had low requirements for strength

Most of the metal materials commonly used in aerospace are alloys, which are smelted and processed based on a certain metal element, adding more than one metal element or non-metal element (depending on the performance requirements).

For example, carbon steel, low-alloy steel and alloy steel, high-temperature alloy, titanium alloy, aluminum alloy, magnesium alloy, etc. Pure metals are rarely used directly, so the vast majority of metal materials are in the form of alloys.

Aviation materials are the material guarantee for the development and production of aviation products, and also the technical basis for aviation products to achieve people's expected performance, service life and reliability. Due to the basic position of aviation materials and the continuous improvement of their contribution to aviation products, aviation materials, aero engines and information technology have become one of the three key aviation technologies in parallel, and they are also one of the six technologies that have an important impact on the development of aviation products.

1. Carbon fiber: It is a new type of fiber material with high strength and high modulus fiber with a carbon content of more than 95%, which is made of organic fibers such as large resistant flake graphite crystallite stacked along the axial direction of the fiber, and obtained by carbonization and graphitization treatment;

2. Boron fiber: refers to the inorganic fiber formed by the deposition of boron on the metal wire, which is usually obtained by reacting hydrogen and boron trichloride on the hot tungsten wire to replace the amorphous boron deposited on the surface of the tungsten wire;

3. Aramid fiber: It is a new type of high-tech synthetic fiber, which has ultra-high strength, high modulus and high temperature resistance, acid and alkali resistance, light weight, insulation, anti-aging, long life cycle and other excellent properties, and is widely used in composite materials, bulletproof products, building materials, special protective clothing, electronic equipment and other fields;

4. Silicon carbide fiber: It is an inorganic fiber with silicon carbide structure prepared by spinning, carbonization or vapor deposition of organosilicon compounds as raw materials, which belongs to ceramic fibers.

Aviation industryThe commonly used aluminum alloys are mainly concentrated in Al-Cu and Al-ZN alloys.

Al-Cu casting alloy is one of the earliest casting alloys, and its biggest feature is high heat resistance, which is the highest heat resistance among all cast flow aluminum alloys. Its high-temperature strength increases with increasing copper content. However, the copper content increases, the density of the alloy increases, the brittleness increases, and the corrosion resistance decreases.

The alloy has a high heat treatment effect and thermal stability, and is suitable for casting high-temperature castings.

However, this alloy has a large tendency to shrink and hot crack, and its casting performance is poor, and it is easy to produce hot cracks. In order to improve the fluidity of the alloy liquid, improve its casting performance, and reduce the tendency of hot cracking after casting, an appropriate amount of silicon is often added to form a ternary eutectic structure (+Si+cual2) with a certain amount of reed round dust. However, the addition of silicon will also damage the room temperature and high temperature properties of the alloy.

Related information

Aluminum alloy is the main material used in the manufacture of aircraft. Aluminum alloys and mild steel used in the manufacture of automobiles.

Comparatively, the Zen ** is expensive, the density is small, and the density is relatively high.

For, compared with the relative density of mild steel, about one-third lighter, although the strength is about the same, but for the aircraft, the light material is the most important, and the corrosion resistance is strong, and the processing is also convenient, so aluminum alloy is the most ideal material for the manufacture of aircraft.

Duralumin can be used to make rivets and aircraft propellers according to its different alloying element content.

and high-strength parts on aircraft; Superduralumin is a duralumin containing zinc, its hardness and strength are higher than duralumin, different varieties of duralumin are used to manufacture various structural parts, high-load parts, is one of the important materials in the aviation industry.

I don't know what you mean by "commonly used in aerospace"? Is it about aircraft, or is it about infrastructure? There are many metal materials commonly used in aerospace according to different uses, can not be listed one by one, the largest amount of iron alloy is a variety of steel, of course, what is needed here is the specific strength of the steel that is ultra-high-strength steel, as well as special performance steel such as stainless steel, heat-resistant steel have applications, such as aircraft engines, landing gear, launch vehicle fasteners, structural parts are this material, in addition, titanium alloy also has applications, because titanium alloy is more expensive, limiting its application, The rest is aluminum alloy, the purpose is to reduce weight, therefore, the metal materials commonly used in aerospace are basically divided into three categories, namely steel, titanium alloy and aluminum alloy.

Summary. Aviation metal and ferroalloy which is good, aviation aluminum is good aviation aluminum light weight, high strength, good toughness, continuous tensile resistance, smooth feel, and lamps stainless steel heavy quality, poor toughness, easy to break strength, easy to deform, so aviation aluminum alloy is good aviation aluminum alloy is made of aluminum, of which 7 series of aviation aluminum alloy, due to its high hardness, compared with ordinary aluminum alloy, its service life is longer, but the use range of aviation aluminum alloy is not large, ordinary buildings will use ordinary aluminum alloy. <>

<> which is better, aviation metal or ferroalloy.

Aviation metal and ferroalloy which is good, aviation aluminum is good yo aviation aluminum light weight, high strength, good toughness, tensile constant, smooth feel, and lamps stainless steel heavy quality, poor toughness, easy to break strength, easy to deform, so aviation aluminum alloy is good aviation aluminum alloy spring high back is made of aluminum, of which 7 series of aviation aluminum alloy, due to its high hardness, compared with ordinary aluminum alloy, its service life is longer, but the use range of aviation aluminum alloy is not large, Ordinary buildings will use ordinary aluminum alloys. <>

<> advantages of aviation aluminum alloy: 1. Aviation aluminum alloy is not easy to deform due to its high hardness, and it is a very durable material. 2. The sound insulation effect of aviation aluminum file Wushan alloy is very good, and the gap in the line of the orange sun connection is relatively small 3. If the aviation aluminum alloy is used for doors and windows, it can achieve a good decorative effect on the doors and windows, so there are more people who use this kind of material now.

<> the above is all of "which is better, aviation metal or ferroalloy", I hope it will be helpful to you<><