Titanium metal is widely used in the aerospace industry […]
Titanium metal is widely used in the aerospace industry due to its advantages of high strength and low density. However, compared with metals such as steel and aluminum, its thermal processing costs are relatively high and economically disadvantaged. Researchers at Florida International University in the United States have discovered a fast and effective low-temperature titanium alloy processing method that reduces the heat required by 50%, which provides greater potential for the research of new titanium-based composite materials.
Researchers use powder metallurgy manufacturing methods, simultaneously apply low temperature (up to 650℃) and high pressure (up to 555 MPa) in spark plasma sintering (SPS), and finally obtain high-density parts, which are in terms of mechanical properties and structural functions. The above is similar to high-temperature processed titanium alloy parts. This discovery is attributed to the "high-pressure assisted mass transfer and induced plastic deformation mechanism" during alloy processing. The researchers found through electron microscope observation that at low temperatures, the pressure on the alloy powder particles exceeded its plastic limit and promoted its densification.
Titanium-based composite materials are considered to be more advantageous for processing at low temperatures. This research result not only provides an alternative method for high-temperature titanium processing, but also provides favorable conditions for the development of titanium-based composite materials.