TRUNNANO Blog provides global discussion and lastest news on New Nano-Materials such as graphite powder, boron powder, nitride powder, Zinc sulfide (ZnS), Amorphous Boron Powder, Molybdenum Disilicide, Spherical /Aluminum Nitride, Nano Diamond Powder, Max phase Ti3AlC2 Powder, 3D Printing Metal Powder, Fe3O4 Powder, AES powder, AOS powder and so on.
By LZH | 11 August 2023 | 0 Comments

Structural and properties evolution of copper–nickel (Cu–Ni) alloys

What is copper-nickel?
Due to Ni and Cu exhibiting complete solid solubility, their alloys are single-phase. Thus, in Ni-Cu alloy, four strengthening mechanisms operate grain refinement, solid solution, precipitation, and dislocation strengthening (work hardening). The composition of an alloy determines whether the solid solution or precipitation strengthening dominates. Mo, Ti, Cr, and Mn are the most frequently used solid solution-strengthening elements due to their significant difference in atomic sizes from Ni. Fe, Co, and Cu are second-order solid solution strengtheners due to their high solubility in Ni. Al and Ti are Ni-Cu alloys' most effective precipitation-strengthening elements, as they tend to form NiAlTi-rich intermetallic particles. Sometimes Mn-rich M23C6 or Ti-rich MC carbides can also precipitate. The dislocation strengthening capacity of Ni-Cu alloys is substantial, which is determined by their fcc crystal structure. However, cold deformation above 20% would decrease ductility below the practically reasonable limits of 30% elongation. In the presence of particle-forming elements in alloy composition, age-hardening heat treatment is frequently used as the final strengthening operation. Cu-Ni alloys exist as a single-phase structure throughout the entire composition range, which includes many standard alloys with minimal additions of other elements for special applications. Cu-Ni alloys were initially used for marine condenser tubes. Cu-Ni alloys containing 10 to 30% nickel with iron and manganese additions (C70600 and C71500) are commonly used for marine applications in addition to coinage and wire mesh. Manganese, combined with commercial alloys, acts as a de-sulfurizer and de-oxidant. It boosts resistance to corrosion in seawater. Iron (about 2%) is added to the alloys used for marine applications. It enhances the strength of the alloy and offers resistance to impingement corrosion occurring from flowing seawater. These alloys are used for marine supplies, which include condensers, tubes, and other applications that come in contact with seawater. The term "copper-nickel (Cu-Ni)" refers to alloys having copper-nickel-iron.

Structural and properties evolution of copper–nickel (Cu–Ni) alloys
Copper–nickel alloy has the potential to sustain the recent demands in advanced marine engineering applications. Cu-Ni alloys have been applied in seawater cooling and fire control systems in the offshore oil and gas industries. Their chloride corrosion and stress cracking resistance properties are widely exploited to improve the durability of these key systems. These alloys have also been commercially applied as platform leg splash zone sheathing. The energy industry has also increasingly employed these alloys in nuclear and fossil fuel power plants for components that deal with heat transfer processes. Steam generators, condensers, tanks, coolers, valves, fittings, and pipes have all benefitted from using these materials. The shipbuilding industry has also exploited the properties of Cu-Ni alloys, providing materials for critical applications such as compressed air systems, onboard desalination plants, fire systems, and hydraulic lines. Furthermore, copper-nickel alloys have found recent novel applications in plates and sheathing for hulls. Chromium can also be added to increase the strength of the alloy. Chromium is used in a 30% nickel-casting alloy. Niobium provides a hardening effect when added to cast versions of 10% and 30% nickel alloys. It increases the weldability of cast alloys. Silicon enhances the casting characteristics of the Cu-Ni alloys and is combined either with chromium or niobium. Tin provides enhanced resistance to atmospheric tarnishing. The C72500 alloy has 2% tin and 9% nickel.

Properties of Cu-Ni alloys
Cu-Ni alloys possess several beneficial properties. They possess superior mechanical properties over a wide range of temperatures. Alloys have special properties such as low-temperature coefficients and high electrical resistivity. Additionally, their enhanced wear and corrosion resistance is key to their commercial applications, and they can resist corrosion fatigue and stress cracking. When more than 15% nickel is added during manufacturing and processing, an attractive light color is produced, enhancing the aesthetic appeal of Cu-Ni alloys. Manufacturing methods such as hot and cold working and casting produce good processing characteristics for semi-fabrications and finished parts. Cu-Ni alloys are manufactured and processed using multiple methods. These include melting, casting, hot and cold working, heat treatments, various machining techniques, joining, and welding methods, including arc welding and TIG. Products can be mechanically fastened with screws and rivets, soldering, and brazing, to mention a few techniques. Surface treatments can be employed to further improve the properties and durability of alloying materials. Both electrochemical and mechanical polishing can be used effectively. Cu-Ni alloys were initially used for marine condenser tubes. Cu-Ni alloys containing 10% to 30% nickel with iron and manganese additions (C70600 and C71500) are commonly used for marine applications in addition to coinage and wire mesh. Since their development, many different applications have been researched for Cu-Ni alloys, leading to their widespread use in several industries today. Specific applications of alloys depend on their proportion of Cu, Ni, and other additions. Copper-nickel alloys are widely used in the desalination industry in MSF plant components such as tubing for heat recovery, heat rejection, and brine heaters. Additionally, they are used in tube plates, linings for flash chambers and water boxes, and piping for various purposes.

Price of copper alloys
Copper alloys particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Copper alloys. A large amount of large amount will be lower. The Price of copper alloys is on our company's official website.

Copper alloys supplier
Luoyang Tongrun Nano Technology Co. Ltd.  (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Copper alloys, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Copper alloys, you are welcome to contact us or inquire at any time.

Leave a Reply

Your email address will not be published.Required fields are marked. *
Verification code