Post by account_disabled on Feb 20, 2024 2:13:48 GMT -5
In collaboration with the Hong Kong Polytechnic University and Hexagon Manufacturing Intelligence Company in Melbourne, researchers from RMIT University and the University of Sydney have developed a strong and ductile D-printed titanium alloy containing abundant, low-cost oxygen and iron as main element of the alloy.
The researcher's titanium alloys consist of a mixture of two types of titanium crystals, called alpha-titanium phase and beta-titanium phase, each associated with a specific arrangement of atoms. These alloys have been mainly produced by adding aluminum and vanadium to titanium.
The research team explored the use of oxygen and iron. These two of the most powerful stabilizers and strengtheners of the alpha and beta titanium phases are abundant and inexpensive.
The researchers found that two challenges hindered the development of strong and ductile alpha-beta iron-oxygen-titanium alloys through conventional manufacturing processes, the first challenge is that oxygen is described as the "kryptonite to titanium" and can make cause titanium to become brittle. Second, the addition of iron can cause serious defects in the form of large patches of beta-titanium.
Combining the team's alloy d C Level Executive List esign concepts with the D printing process in the design was the key factor for the researchers, who identified a range of alloys that are strong, ductile and easy to print.
The researchers used laser-directed energy deposition (L-DED), a D printing process suitable for manufacturing large, complex parts, to print their alloys from metal powder.
The attractive properties of these new alloys can rival commercial alloys and are attributed to their microstructure.
"This research offers a new titanium alloy system capable of a wide tunable range of mechanical properties, high manufacturability, enormous potential for emission reductions and insights for materials design in related systems," said Professor Simon Ringer. , co-principal investigator and Pro-Vice-Chancellor of the University of Sydney.
“We have engineered a nanoscale oxygen gradient in the alpha-titanium phase, which features high-oxygen segments that are strong and low-oxygen segments that are ductile, allowing us to exert control over local atomic bonding. and thus mitigate the potential for fragility,” said Professor Simon Ringer.
The results of this research can potentially be used in various applications, such as the reuse of waste titanium-oxygen-iron alloy sponges, recycled 'off-spec' high-oxygen titanium powders, or titanium powders made from high oxygen titanium scrap using this approach. This research may also provide a template for mitigating these oxygen embrittlement issues through D printing and microstructure design.
Reusing waste and low-quality materials has the potential to add economic value and reduce the high carbon footprint of the titanium industry.
The researcher's titanium alloys consist of a mixture of two types of titanium crystals, called alpha-titanium phase and beta-titanium phase, each associated with a specific arrangement of atoms. These alloys have been mainly produced by adding aluminum and vanadium to titanium.
The research team explored the use of oxygen and iron. These two of the most powerful stabilizers and strengtheners of the alpha and beta titanium phases are abundant and inexpensive.
The researchers found that two challenges hindered the development of strong and ductile alpha-beta iron-oxygen-titanium alloys through conventional manufacturing processes, the first challenge is that oxygen is described as the "kryptonite to titanium" and can make cause titanium to become brittle. Second, the addition of iron can cause serious defects in the form of large patches of beta-titanium.
Combining the team's alloy d C Level Executive List esign concepts with the D printing process in the design was the key factor for the researchers, who identified a range of alloys that are strong, ductile and easy to print.
The researchers used laser-directed energy deposition (L-DED), a D printing process suitable for manufacturing large, complex parts, to print their alloys from metal powder.
The attractive properties of these new alloys can rival commercial alloys and are attributed to their microstructure.
"This research offers a new titanium alloy system capable of a wide tunable range of mechanical properties, high manufacturability, enormous potential for emission reductions and insights for materials design in related systems," said Professor Simon Ringer. , co-principal investigator and Pro-Vice-Chancellor of the University of Sydney.
“We have engineered a nanoscale oxygen gradient in the alpha-titanium phase, which features high-oxygen segments that are strong and low-oxygen segments that are ductile, allowing us to exert control over local atomic bonding. and thus mitigate the potential for fragility,” said Professor Simon Ringer.
The results of this research can potentially be used in various applications, such as the reuse of waste titanium-oxygen-iron alloy sponges, recycled 'off-spec' high-oxygen titanium powders, or titanium powders made from high oxygen titanium scrap using this approach. This research may also provide a template for mitigating these oxygen embrittlement issues through D printing and microstructure design.
Reusing waste and low-quality materials has the potential to add economic value and reduce the high carbon footprint of the titanium industry.