Metal titanium 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 cost is relatively high, and it is economically disadvantaged. Researchers have discovered a fast and effective method of machining titanium, which reduces the heat required by 50%, which provides greater potential for the research of new titanium-based composite materials.
Researchers used powder metallurgy manufacturing methods, simultaneously applying low temperature (up to 650℃) and high pressure (up to 555 MPa) in spark plasma sintering (SPS), and finally obtained high-density parts, which are in mechanical properties and structural functions. The above is similar to high temperature treated titanium alloy parts. This discovery is attributed to the “high pressure assisted mass transfer and induced plastic deformation mechanism” during alloy processing. Researchers observed through electron microscopy 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.