Definition
The low temperature titanium alloy refers to α and α-β titanium alloys suitable for use in low temperatures.
Introduction
The titanium alloy used in a wide low temperature range is mainly: industrial blunt titanium, Ti-5Al-2.5SNα alloy, Ti-6Al-4V and Ti-8Al- 1MO-1V α-β alloy. In order to improve low temperature plasticity and toughness, the ELI low-temperature titanium alloy (ultra-low gap element titanium , etc.) is divided into a class of gap elements. Typical alloys have Ti-5Al-2.5sneli and Ti-6Al-4V ELI. Ti-5Al-2.5SN ELI alloys is particularly suitable for liquid fuel storage containers operating at low temperatures at -253 ° C, Ti-6Al-4V ELI also has better low temperature plasticity and higher fracture toughness, suitable for manufacturing Low temperature vessels and aircraft structural forgings and thick plate structures that require high breakage toughness.
Features
This type of alloy strength increases with temperature, the toughness is rare, and there is a good solderability, and there is high strength, corrosion resistance, thermal conductivity. Low, a low temperature structure, especially the low temperature vessel in the aerospace aircraft.
Classification
can be divided into three types, α (HCP structure), β (HCC structure) and α-beta titanium alloy according to tissue state.
Ti-6Al-1 ELI
also has a good low temperature plasticity and higher fracture toughness, suitable for manufacturing aircraft structural forgings that require high-level crack toughness and Thick plate structure.