Development progress of titanium alloys
The excellent properties of titanium, titanium alloys have prompted mankind to urgently need them. However, the high production cost limits its application.
Despite the fact that Titanium alloy parts have such predominant properties, there is still quite far to go before the all inclusive use of titanium and alloy. The reasons incorporate excessive cost, unfortunate formability and unfortunate welding execution. Whether it is the underlying refining of the metal or resulting handling, the cost of titanium amalgams is a lot higher than that of different metals.
With the improvement of Titanium alloy close to net shape innovation and current welding advances, for example, electron shaft welding, plasma bend welding, and laser welding lately, the framing and welding issues of titanium amalgams are presently not the key variables confining the use of Titanium alloy. Lately, Nations are growing extraordinary failure cost and superior execution titanium amalgams, and are endeavoring to bring Titanium alloys into the regular citizen modern field with immense market potential. New advancement in the exploration ofTitanium alloy materials at home and abroad is primarily reflected in the accompanying viewpoints.
High temperature titanium alloy
In recent years, foreign countries have adopted rapid solidification/powder metallurgy technology, fiber or particle reinforced composite materials to develop titanium alloys as the development direction of high-temperature titanium alloys, so that the use temperature of titanium alloys can be increased to above 650°C. The American McDonnell Douglas Company has successfully developed a high-purity, high-density titanium alloy using rapid solidification/powder metallurgy technology. Its strength at 760°C is equivalent to the strength of titanium alloys currently used at room temperature.
Titanium alloy based on titanium aluminum compound
Compared with general titanium alloys, the biggest advantages of titanium-aluminum compounds based on sodium Ti3Al (α2) and TiAl (γ) intermetallic compounds are good high-temperature properties (the maximum operating temperatures are 816 and 982°C respectively), strong oxidation resistance, and Good creep properties and light weight (density is only 1/2 of nickel-based superalloys), these advantages make it the most competitive material for future aeroengines and aircraft structural parts.
High strength and high toughness beta titanium alloy
The β-type titanium alloy was first developed by the American Crucible Company in the mid-1950s as the B120VCA alloy (Ti-13v-11Cr-3Al). β-type titanium alloy has good hot and cold working properties, is easy to forge, can be rolled and welded, and can obtain high mechanical properties, good environmental resistance and a good combination of strength and fracture toughness through solution-aging treatment. The most representative new high-strength and high-toughness β-type titanium alloys are as follows:
Ti1023 (Ti-10v-2Fe-#al), this alloy has equivalent properties to the 30CrMnSiA high-strength structural steel commonly used in aircraft structural parts, and has excellent forging properties;
Ti153 (Ti-15V-3Cr-3Al-3Sn), the cold working performance of this alloy is better than that of industrial pure titanium, and the room temperature tensile strength after aging can reach more than 1000MPa;
β21S (Ti-15Mo-3Al-2.7Nb-0.2Si), this alloy is a new type of oxidation-resistant, ultra-high-strength titanium alloy developed by the Timet Division of the American Titanium Metal Company. It has good oxidation resistance and hot and cold processing properties. Excellent, can be made into foil with a thickness of 0.064mm;
Flame retardant titanium alloy
Conventional titanium alloys have a tendency to burn under certain conditions, which largely limits their applications. In response to this situation, various countries have carried out research on flame-retardant titanium alloys and achieved certain breakthroughs. Alloy c developed in the United States is a flame-retardant titanium alloy that is insensitive to sustained combustion and has been used in the F119 engine. BTT-1 and BTT-3 are flame-retardant titanium alloys developed in Russia. They are both Ti-Cu-Al alloys. They have very good thermal deformation process performance and can be made into complex parts.
Medical titanium alloy
Titanium is non-harmful, lightweight, high-strength and has incredible biocompatibility. It is an optimal clinical metal material and can be utilized as inserts embedded in the human body. As of now, Ti-6Al-4v ELI amalgam is still broadly utilized in the clinical field. Notwithstanding, the last option will hasten tiny measures of vanadium and aluminum particles, which lessens its cell versatility and may hurt the human body. This issue has previously drawn in far and wide consideration in the clinical local area. As soon as the mid-1980s, the US started to foster aluminum-, without vanadium, biocompatibleTitanium alloys for muscular health. Japan, the United Kingdom, etc. have also done a lot of research work in this area and made some new progress. have likewise done a ton of exploration work around here and gained some new headway. It is estimated that in the near future, Lutitanium alloy, which has high strength, low elastic modulus, excellent formability and corrosion resistance, is likely to replace the Ti-6Al-4V ELI alloy currently widely used in the medical field.
