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Introduction to the physical properties of titanium powder

wallpapers News 2021-02-04
Among the metal elements, titanium has high specific strength. It is a high-strength but low-quality metal with fairly good ductility (especially in an oxygen-free environment). The surface of titanium has a silver-white metallic luster. Its melting point is quite high (over 1,649 degrees Celsius), so it is a good refractory metal material. It is paramagnetic, and its electrical and thermal conductivity is very low.
Commercial grade titanium (purity of 99.2%) has an ultimate tensile strength of about 434 megapascals, which is similar to lower grade steel alloys but is 45% lighter than steel alloys. The density of titanium is 60% higher than that of aluminum, but its strength is twice that of the common 6061-T6 aluminum alloy. Titanium can be used for various purposes. Some titanium alloys (such as βC) have a tensile strength of 1,400 megapascals. However, when titanium is heated above 430 degrees Celsius, its strength will be weakened.
Although not comparable to high-grade heat-treated steel, titanium still has a considerable hardness. Titanium is not magnetic, and it is also a poor thermal and electrical conductor. Pay attention to mechanical processing, because if sharp tools and proper cooling methods are not used, titanium will soften and leave indentations. Like the steel structure, the titanium structure has a fatigue limit, so it can guarantee durability in some applications. The specific stiffness of titanium alloy is generally not as good as other materials such as aluminum alloy and carbon fiber, so it is less used in structures that require high stiffness.
Titanium has two allotropes. At 882 degrees Celsius, it will transform from the hexagonal most densely packed α type to a body-centered cubic β type. Before reaching the critical temperature, the specific heat of the α type will increase sharply as the temperature rises but will decrease after reaching the critical temperature, and then remain basically constant regardless of the temperature under the β type. Similar to zirconium and hafnium, titanium also has an omega state, which is thermodynamically stable under high pressure, but may also exist in a metastable state under normal pressure. This state is generally hexagonal (ideal) or triangular (distorted), and can be observed when the plane of the β-type (111) atom is collapsed by soft longitudinal-wave acoustic photons.