A high-hardness, high-entropy alloy and its production method.

Abstract

The invention relates to a high-entropy Al49Zn13Cu11Ni5Si9Mg8Mn5 alloy and its production method. The alloy offers advantages such as superior hardness, low density, high temperature resistance, and tribological properties. The production method is an economical and industrially viable process involving melting in an induction furnace and casting into a steel mold. The invention presents an innovative and superior alloy that simultaneously meets the four basic criteria described in the literature (mixture entropy, Hume-Rothery rules, mixture enthalpy, and the ε approach). With these properties, it has the potential for use in sectors such as automotive, aerospace, tea manufacturing (tea mills), and defense.

Description

A high-hardness, high-entropy alloy and this alloy... PRODUCTION METHOD Technical Field to Which the Invention Relates The invention relates to a high-strength, lightweight, high-entropy alloy (HEA) and the resulting material of this alloy. It relates to the production method. The invention describes the production of Al49Zn13Cu11Ni5Si9Mg8Mn5 alloy. induction furnace melting and steel mold casting process steps This alloy contains high hardness, achieved through the process steps described in the production method. synergistic effects such as strength, low density and superior tribological properties is winning. State of the Art High entropy alloys (HEAs) have become an important area of ​​focus in materials science in recent years. It has become a subject of research. These alloys contain equal or equal amounts of at least five basic elements. They are formed by the combination of components in close atomic ratios. HEAs differ from traditional alloys. In contrast, superior mechanical, thermal and tribological properties are achieved thanks to the high mixture entropy. It has the potential to exhibit features such as high temperature resistance and wear resistance. and properties such as corrosion resistance, especially in aviation, tea manufacturing (tea factories), This allows them to find wide application in sectors such as defense and automotive. He knows. When the current state of the art is examined, in order to improve the mechanical properties of HEAs Combining different alloying elements, developing new production methods, and Various approaches have been adopted, such as the application of thermomechanical processes. In particular Lightweight HEAs composed of elements such as Al, Mg, Zn, Cu, and Si offer high strength-to-weight ratios. They have attracted attention due to their ratios. However, the materials used in the production of these alloys... These methods generally require a vacuum environment, argon atmosphere, or shielding gas. This leads to high costs. Furthermore, thermal stability is a concern in most lightweight HEAs. Problems are being observed, which is a limiting factor for high-temperature applications. It constitutes. 1 Another limitation of current studies is that the elements used are generally expensive and One of the reasons is their rarity. For example, beryllium (Be), scandium (Sc), and zirconium (Zr). These elements increase the costs of alloys and hinder their large-scale applications. This is a restriction. Furthermore, these elements may have toxic effects or negative environmental consequences. Therefore, their use may be limited. The limitations and inadequacies of current technological solutions, and the high cost of alloys... Reasons such as containing elements, low thermal stability, and environmental impacts. Therefore, it has become necessary to make a development in the field of high-entropy alloys. Brief Description and Objectives of the Invention The invention relates to a high-strength, lightweight, high-entropy Al49Zn13Cu11Ni5Si9Mg8Mn5 alloy. It is related to the alloy and its production. The alloy has superior hardness, low density, and high... while offering temperature resistance and tribological properties, it also facilitates melting and steel production in induction furnaces. It is produced by an economical and industrial method such as casting. The invention, mixture four fundamental principles such as entropy, Hume-Rothery rules, mixture enthalpy, and the Ω approximation. It offers an innovative solution by meeting the criteria. One aim of the invention is to create a high-entropy material with high strength and stiffness values. The goal is to obtain alloys, especially aluminum-based alloys, at high temperatures. The aim is to prevent loss of strength and increase the durability of these materials. This ensures the performance and durability of alloys used in various industries. By improving it, it provides long-lasting solutions. Another aim of the invention is to obtain a high-entropy alloy with low production costs. The production method used during the development of the alloy is argon gas or It does not include cost-increasing elements such as vacuum suction. It is applicable on an industrial scale. The method of melting in an induction furnace and casting into steel molds is an economical production method. This approach ensures a smooth process. This approach both reduces production costs and... It aims to create a wide range of potential uses in industry. The invention also enables the creation of a high-entropy alloy with a wide range of applications. The aim is to provide a lightweight and durable alloy for automotive, defense, and other applications. tea manufacturing (tea factories), aviation and aerospace industries, and many other sectors. It offers superior mechanical properties that can be used. 2 Additionally, another aim of the invention is to create a more environmentally friendly and sustainable high-entropy alloy. The aim is to achieve this. Lightweight alloys provide energy savings and have less environmental impact in industry. It enables harmful production processes. Furthermore, it involves expensive and toxic elements. Achieving high performance without using other methods, economic and environmental sustainability. This is important from that perspective. Detailed Description of the Invention The invention is a high-entropy Al49Zn13Cu11Ni5Si9Mg8Mn5 alloy with high hardness. (HEA) and its production method are related. The alloy subject to the invention contains 49% atomic (34.02%). aluminum (by mass), 5% atomic (7.55% by mass) nickel, 11% atomic It contains 17.99% copper (by mass), 9% atomic (6.5% by mass) metallic silicon, and 13%... atomic (21.87% by mass) zinc, 8 atomic (5% by mass) magnesium and It contains 5% atomic (7.07% by mass) manganese. Studies on lightweight HEAs in the literature generally involve microhardness measurements. These measurements are performed, and the mechanical properties of the alloys are evaluated based on these measurements. However, microhardness measures the hardness of only a specific phase of the material. fully accurate macrohardness values ​​used in industrial applications This does not reflect the materials used in the design and manufacturing processes. It imposes limitations on accurately evaluating performance. Furthermore, studies on HEA with macrohardness values ​​are quite limited in the literature, and this This creates a significant gap in the materials development process. Four criteria specified for high-strength, high-entropy alloys (at least 5 Composed of elements, and each element having an atomic proportion greater than 5%, The entropy of the mixture must be greater than 1.5 times the gas constant (R), according to the Hume-Rothery equation. (satisfying the rules and having an Ω value greater than 1.1) simultaneously 3 and high density with a value less than 5 g / cm³ (falling into the light alloy category) a high-strength, high-entropy alloy in the literature and / or in practice No such thing has been encountered. Non-lightweight alloys used in industrial applications. Their high density leads to increased energy consumption and costs. Light alloys with low density generally have low hardness. They exhibit this, which leads to their performance remaining low. With the invention... The literature lists four different criteria for high-strength, high-entropy alloys. 3 3 providing, with a density lower than 5 g / cm³, meaning it falls into the light alloy category. aluminum-based alloys with much higher surface area and hardness than similar alloys in the literature. A new lightweight alloy is obtained. The invention is based on the newly developed... Induction is an industrial production method of Al49Zn13Cu11Ni5Si9Mg8Mn5 alloy. The production process consists of melting in a furnace and casting steel into molds under room conditions. It also includes the method. The subject of the invention is the Al Zn Cu Ni Si Mg Mn alloy. 49 13 11 5 9 8 5 Its characteristics are given in Table 1. Table 1. Properties of the Al49Zn13Cu11Ni5Si9Mg8Mn5 alloy, which is the subject of the invention. Casting method used Mixture Density Hardness Ω Entropy 3 entropy (R) (g / cm³) value category Induction melting 1.58 3.97 292±26 VSD 1.19 High entropy of melting chamber in furnace casting alloy under these conditions The production method of the high-entropy Al-Zn-Cu-Ni-Si-Mg-Mn alloy in question is as follows: 49 13 11 5 9 8 5 a. 49% atomic percentage (34.02% by mass) aluminum and 5% atomic percentage (7.55% by mass) Placing the nickel together in the crucible of the induction furnace, b. After the induction cooktop is operated at 2 kW, it is switched to 5 kW every 5 minutes. gradually increasing the power of the stove to 17 kW c. Nickel, after completely melting in aluminum, remains at a concentration of 5 atomic%. Adding all of the manganese (7.07% by mass) to the molten metal, d. After the manganese has completely melted, it contains 11% atomic percentage (17.99% by mass) of copper. Added to molten metal in packages of up to 80 grams at five-minute intervals. being done, e. After copper is completely melted, it contains 9% atomic metallic content (6.5% by mass). Adding silicon to molten metal, f. Stirring every 10 minutes with a high-temperature resistant rod for 40 minutes. waiting for the melting to be completed throughout, g. When the silicon is completely melted, the power of the induction furnace is reduced to 13 kW and he The temperature of the liquid metal is lowered in a controlled manner to 900-910°C. 4 h. then 13% atomic percentage (21.87% by mass) of zinc was divided into two equal parts he divided into pieces, wrapped in aluminum foil, and placed in molten metal at 900°C for 5 minutes. added in two stages with a gap i. After the melting process is complete, wait 10 minutes and then induction... reducing the power of the stove to 12 kW, he j. After the temperature of the molten metal drops to 880-890°C, it is applied to aluminum foil. 8% atomic percentage (5% by mass) of magnesium in wrapped form in molten metal 5 added in two stages, one minute apart k. The molten liquid metal is stirred every 5 minutes for 30 minutes and the mixture is then mixed... he After ensuring the metal's temperature reaches 860-870°C, it is poured into a steel mold. The process involves the following steps. Reactions that occur when active metals (Mg and Zn) come into contact with the atmosphere. A vacuum environment is used in its prevention. However, the use of a vacuum environment... This restricts the industrial-scale production of the alloy and increases its cost. The subject of the invention... In the production of the alloy, aluminum is first melted, and other alloys are added to the molten aluminum. It is included in the mixture. This is because of aluminum's superior oxidation resistance. Its presence, or rather its reaction with the atmosphere, is quite limited. All other... Alloy elements are added to molten aluminum and heated at high temperatures. Contact with air is prevented. In the production process of the alloy that is the subject of the invention, the element Cu is supplied in 80 gram packages. The reason for its addition is that the added copper completely dissolves into the molten aluminum bath. By burying it, it is prevented from coming into contact with the atmosphere. Zn and Mg elements During the addition, the molten metal temperature is precisely controlled and the casting is done. he The temperatures are reduced to near the specified range (910-890°C). Afterwards, zinc... It is wrapped in aluminum foil and added to the molten metal, thus allowing it to come into direct contact with the air. Contact is prevented. Similarly, the element Mg is also removed from the casting as much as possible. wrapped in aluminum foil at a temperature close to that of the molten metal bath It is added inside and contact with the atmosphere is prevented, thus preventing the chemical reaction from occurring. (The burning) is prevented.

Claims

1. It is a high-entropy alloy with high hardness, characterized by its 49% atomic density. 34.02% by mass of aluminum, 5% atomic percentage (7.55% by mass) of nickel, 11% atomic (17.99% by mass) copper, 9% atomic (6.5% by mass) metallic silicon, 13 atomic (21.87% by mass) zinc, 8 atomic (5%) magnesium (by mass) and 5% atomic (7.07% by mass) manganese It includes.

2. A method for producing a high-entropy alloy according to claim 1, and its properties are: a. 49% atomic percentage (34.02% by mass) aluminum and 5% atomic percentage (7.55%) Placing nickel (by mass) together in the crucible of the induction furnace, b. After the induction cooktop is operated at 2 kW power, turn it off every 5 minutes. The power of the stove should be gradually increased to 17 kW. c. Nickel, after completely melting in aluminum, contains 5% atomic fiber. Adding all of the manganese (7.07% by mass) to the molten metal, d. After manganese is completely melted, it contains 11% atomic percentage (17.99% by mass) copper in packages of no more than 80 grams at five-minute intervals. adding to molten metal, e. copper, after being completely melted, at a concentration of 9 atomic percent (6.5 percent by mass) Adding metallic silicon to molten metal, f. Stir every 10 minutes with a high-temperature resistant rod until 40 Waiting for the melting to complete for a few minutes, g. When the silicon is completely melted, the power of the induction cooker is 13 kW. he by drawing it out and controlling the temperature of the liquid metal to 900-910°C. lowering, h. then 13% atomic percentage (21.87% by mass) of zinc was divided into two equal parts he divided into sections, wrapped in aluminum foil, and then immersed in molten metal at 900°C. added in two stages, one minute apart i. After the melting process is complete, wait 10 minutes and then induction... reducing the power of the stove to 12 kW, he j. After the temperature of the molten metal drops to 880-890°C, aluminum 8% atomic magnesium (5% by mass) wrapped in foil Adding to the molten metal in two stages, 5 minutes apart. 6 k. The molten liquid metal is stirred every 5 minutes and this process is continued for 30 minutes. he After the liquid metal's temperature is brought to 860-870°C, the steel performing the casting process It includes the steps of the process. 7