1.Three-dimensional printing alloys: types
The type of material determines whether 3D printing metal materials falls into iron-based alloys, titanium and titanium based alloys, nickel based alloys, cobalt chromium alloys, aluminum alloys, copper alloys, etc.
alloy based on iron
Previously investigated and more thoroughly in 3D printing metal materials, iron based alloys are a class of alloy. Tool steel, 316L stainless steel, M2 high-speed steel, H13 mold steel, and 15-5PH martensitic aged steel define this kind of alloy mostly. Particularly fit for mold production, iron based alloys possess low cost, great hardness, outstanding toughness, and excellent machinability. One important use of iron-based alloys, for instance, is 3D printing of conformal waterway molds, which can improve the uniformity of the temperature field, so minimize product faults, and extend mold life by exactly arranging the cooling channels.
Alloys from titanium and titanium
Because of their great high specific strength, outstanding heat resistance, corrosion resistance, and good biocompatibility, titanium and titanium alloys have evolved into perfect materials in sectors including medical devices, chemical equipment, aerospace, and sports equipment. But titanium alloy is a common tough to machine material with great stress and temperature during processing, and severe tool wear that limits its broad use. Because it can be done in a protective atmospheric setting, therefore preventing interactions between titanium and elements like oxygen and nitrogen, 3D printing technology is well suited for the fabrication of titanium alloys. Simultaneous quick heating and cooling of tiny regions also reduces the volatilization of alloy components. Furthermore, 3D printing can produce intricate forms without cutting, therefore optimizing material use and lowering manufacturing expenses. Currently, pure Ti, Ti6A14V (TC4), and Ti6A17Nb-highly used in aerospace parts and artificial implants-such as bones, teeth, etc.-are among the 3D printed titanium and titanium alloys available.
alloy based on nickel
Among the fastest developing and most often used superalloys are nickel base alloys. Widely applied in aircraft, petrochemical, shipbuilding, energy and other sectors, they have great strength and definite corrosion resistance at 650–1000 ℃. For aircraft engines' turbine blades and discs, for instance, nickel based superalloys find use. Three-dimensional printed nickel based alloys often have grades of Inconel 625, Inconel 718, and Inconel 939.
Alloys of cobalt chromium
Although they are also employed as high-temperature alloys, cobalt based alloys have restricted development due to resource constraint. Currently extensively applied as medical materials for the fabrication of dental and orthopedic implants, cobalt based alloys have greater biocompatibility than titanium alloys. Commonly used 3D printed cobalt based alloy grades consist in Co 212, Co 452, Co 502, and CoCr28Mo6.
alloy of aluminum
Low density, good corrosion resistance, strong fatigue resistance, high specific strength and stiffness-all of which define aluminum alloy as a lightweight material. Commonly used grades in cast aluminum alloy, the material utilized in 3D printing include AlSi10Mg, AlSi7Mg, AlSi9Cu3, etc. Mostly depending on common technologies such selective laser melting (SLM), electron beam melting (EBM), and direct energy deposition (DED), aluminum alloy 3D printing technique These technologies accurately heat aluminum alloy powder using high-energy lasers or electron beams, so melting and stacking layer by layer to finally produce the intended shape of the part. Applications for aluminum alloy 3D printing technology are rather wide in aerospace, automotive, medical, and other industries.
copper combination
Made for use in mold inserts or rocket engine combustion chambers, copper alloy has good thermal conductivity. For a combustion chamber made of GRCop-84 copper alloy inner walls and nickel alloy outside walls, NASA, for instance, employed 3D printing technology. SLM technology was used in production of the inner walls; electron beam fuse deposition finished the outer walls. The combustion chamber still shows good form after full power ignition testing, demonstrating that 3D printing technology has the same impact as conventional technology and saves a lot of time and process expenses.
2.3D Printing Alloys: Applications
Aeronautical
In the aerospace industry, 3D printing alloy technology offers fresh opportunities for aircraft lightweight design. Engine blades and fuselage frames can be produced by precisely regulating the microstructure and printing path of the alloy, therefore enabling lightweight and robust airplane components. Along with improving fuel economy, this shortens the research and development cycle and lowers manufacturing costs, therefore lightening the total weight of the aircraft.
Production of automobiles
Additionally showing significant promise in the car manufacturing sector is 3D printing alloy technology. Important parts of cars such suspension systems, transmissions, etc. can be produced from it. Integrated printing of complicated structures can be accomplished with 3D printing technology, therefore lowering the component count and enhancing the vehicle's whole performance and integration. Simultaneously, 3D printing alloy technology may be tailored to fit consumer requirements, therefore satisfying the demand for varied and high-performance vehicles from the market.
tools and equipment for medicine
In the world of medical equipment, 3D printing alloy technology has transformed medical innovation drastically. Precision medical equipment and implants like artificial joints, orthodontic appliances, etc. can be produced from it. By means of 3D printing technology, exact production and customizing of these equipment may be accomplished, therefore enhancing patient comfort and surgical success rate.
Several disciplines
Apart from the above listed domains, 3D printing alloy technology has shown great possibilities in several sectors like building, art, and electronics. 3D printing alloy technology, for instance, may create intricate and beautiful sculptures in artistic production; in the building sector, it can be utilized to create very precise building components.
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