Custom Size High Purity Zirconium Titanium Alloy Rod TZM Titanium Zirconium Molybdenum Rod

Strengthening mechanism of TZM alloy
Solid solution strengthening: refers to the solute atoms in the solid solution causing matrix lattice defects, increasing the resistance to dislocation movement, making it difficult to slip, thereby improving the strength and hardness of the solid solution in the alloy. Appropriate concentrations of solute atoms can increase a metal's strength and hardness, but reduce its toughness and ductility.

The solute atoms of TZM alloy are elements such as titanium (Ti) and zirconium (Zr). They dissolve in the molybdenum (Mo) matrix, distorting the crystal lattice and increasing strength and hardness. On the other hand, the greater the difference between solute atoms and solvent atoms, the better the strengthening effect. The atomic size difference factor between Zr and Mo is +14.3, and the atomic size difference factor between Ti and Mo is +4.4. Therefore, Zr plays an important role in solid solution strengthening in TZM alloys. Although the atomic size difference factor between carbon (C) and Mo is -34.5, it is not considered due to the small solubility of C in Mo.

Second phase strengthening mechanism: In composite alloys, in addition to the matrix phase, there is also a second phase. When the second phase is evenly distributed in the matrix phase, a significant strengthening effect is produced. The main function of the second phase is to hinder dislocation movement and improve the deformation resistance of the alloy. The second phase of TZM alloy refers to TiC and ZrC carbide particles. Their Mo evenly distributed in the matrix effectively hinders dislocation movement and strengthens the alloy. However, TZM alloys contain more oxides than carbides. Oxides within a certain range can prevent dislocation slip and increase the strength of the alloy, but it makes hot working more difficult and increases the brittleness of the alloy. It has been reported that the addition of aluminum oxide and zirconia to the alloy can improve the hot workability of the alloy.

Deformation strengthening mechanism: TZM alloy can be deformed and strengthened at the recrystallization temperature. In addition, the deformation strengthening effect increases with the amount of deformation. Deformation strengthening methods include: forging, extrusion and hot rolling. During the deformation process, the alloy grains are stretched along the processing direction, resulting in lattice distortion, increased dislocation density, and secondary grains (grain refinement), thereby increasing the strength of the alloy.

After deformation strengthening, the strength, plasticity and plastic brittleness of the alloy are greatly improved. However, the strength of the alloy decreased after annealing. In order to increase the strength of the alloy, nitriding treatment can be used to produce titanium nitride particles in the matrix, thereby improving the hardness and tensile strength of the alloy.

TZM alloy (molybdenum zirconium-titanium alloy) and physical properties of pure molybdenum compared as follows:

Mechanical Properties of TZM alloy (molybdenum zirconium-titanium alloy) (ri0.5 / Zr0.1) as follows:

TZM alloy (molybdenum zirconium-titanium alloy) high-temperature tensile strength and elongation:

TZM alloy (molybdenum zirconium-titanium alloy) thermal performance and electrical properties: