[ Source：　|　Author：This station　|　Publication Time：2018-03-01 |　Browse：285Number ]

1. Tensile strength of pure titanium is 265-353MPa, - like titanium alloy is 686-1176MPa, up to now up to 1764MPa. Titanium and many steel strength, but the strength of steel is far less than titanium.

2. Titanium and titanium alloy compressive strength of not less than its tensile strength. The compressive yield strength and tensile yield strength of commercial pure titanium are approximately the same, while the compressive strength of Ti-6A1-4V and Ti-5Al-2.5Sn is slightly higher than the tensile strength.

3. Shear strength is generally 60% -70% of the tensile strength. The yield strength of titanium and titanium alloy sheets is about 1.2-2.0 times the tensile strength.

4. Under normal atmospheric conditions, the endurance limit for processed and annealed titanium and titanium alloys is 0.5-0.65 Tensile Strength. Tensile limit of annealed Ti-6Al-4V is 0.2 times tensile strength when subjected to 10 million fatigue tests with notched OCt = 3.9.

5. The highest purity of industrial grade titanium processing hardness is usually less than 120HB (Brinell hardness), other industrial pure processing of titanium hardness of 200-295HB. Pure titanium casting hardness of 200-220HB. Titanium alloy in the annealed state hardness value of 32-38HRC (Rockwell), equivalent to 298-349HB. As-cast Ti-5Al-2.5Sn and Ti-6A1-4V have a hardness of 320HB and low-gap impurities Ti-6A1-4V have a hardness of 310HB.

6. Industrial pure titanium tensile modulus 105-109GPa Most titanium alloys in the annealed state of tensile modulus 110-120GPa. The age-hardened titanium alloy has a slightly higher tensile modulus of elasticity than that in the annealed state, and the compressive elastic modulus is equal to or greater than the tensile modulus of elasticity. Titanium than the elastic modulus of children and aluminum alloy equal, second only to beryllium, molybdenum and some superalloys.

7. Industrial pure titanium torsion or shear modulus of 46GPa, titanium alloy shear modulus of 43-51GPa. In order to increase the strength of the titanium alloy, increasing the spacers containing the child will have a detrimental effect on the impact resistance and the fracture toughness of the alloy. According to the different types and states of titanium alloy, the value of Charpy notched impact strength of denatured industrial pure titanium is 15-54 j / m 3, and the state of casting is about 4-10 j / m 3. The impact strength of the titanium alloy in the annealed condition is 13-25.8 J / m3, and the aging condition is slightly lower.

8. Many titanium alloys have high fracture toughness, or titanium alloys have good crack growth resistance. Annealed Ti-6A1-4V is an excellent toughness material, when the notch concentration factor K = 25.4mm, notched tensile strength and non-notched tensile strength ratio greater than 1.

9. Titanium alloy can maintain a certain temperature at the same temperature. General industrial titanium at 540C temperature to maintain its performance, but only for a short time, long enough temperature range 450-481TC. Has been developed for the use of 600 titanium alloy temperature. Titanium alloy as a missile material can be long-term use of 540t temperature, but also short-term use at 760X temperature.

Titanium and titanium alloys retain their original mechanical properties at low and ultra-low temperatures. As the temperature decreases, the strength of titanium and titanium alloys increases while the ductility deteriorates. Many annealed titanium alloys also have sufficient ductility and fracture toughness at a temperature of 195.5 ° C. Containing interstitial elements of ultra-low 1 ' 5 1-2.5511 can be used at a temperature of 252.71. Its notched tensile strength versus notched tensile strength is 0.95-1.15 at _25.7 ° C.