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Nickel titanium, also known as nitinol, is a metal alloy of nickel and titanium, where the two elements are present in roughly equal atomic percentages.Different alloys are named according to the weight percentage of nickel; e.g., nitinol 55 and nitinol 60.
The main GCP phase is γ'. Almost all superalloys are Ni-based because of this phase. γ' is an ordered L1 2 (pronounced L-one-two), which means it has a certain atom on the face of the unit cell, and a certain atom on the corners of the unit cell. Ni-based superalloys usually present Ni on the faces and Ti or Al on the corners.
Examples include: [5] Ti-6Al-4V, Ti-6Al-4V-ELI, Ti-6Al-6V-2Sn, Ti-6Al-7Nb, and Ti62A [6] Beta and near beta alloys, which are metastable and which contain sufficient beta stabilisers (such as molybdenum, silicon and vanadium) to allow them to maintain the beta phase when quenched , and which can also be solution treated and aged to improve ...
The two most prevalent shape-memory alloys are copper-aluminium-nickel and nickel-titanium (), but SMAs can also be created by alloying zinc, copper, gold and iron.Although iron-based and copper-based SMAs, such as Fe-Mn-Si, Cu-Zn-Al and Cu-Al-Ni, are commercially available and cheaper than NiTi, NiTi-based SMAs are preferable for most applications due to their stability and practicability [1 ...
Its compositions are (Ni, Cr, Fe) x (Nb, Mo, Ti) y and Ni y Nb, it is brittle, and its presence can be detrimental to the mechanical behavior of Inconel alloys. [ 27 ] [ 33 ] [ 36 ] Sites with large amounts of Laves phase are prone to crack propagation because of their higher potential for stress concentration. [ 31 ]
Nickel aluminide refers to either of two widely used intermetallic compounds, Ni 3 Al or NiAl, but the term is sometimes used to refer to any nickel–aluminium alloy. These alloys are widely used because of their high strength even at high temperature, low density, corrosion resistance, and ease of production. [1]
Ni 2 Fe to Ni 3 Fe Earth's core: Earth's core is composed of an iron–nickel alloy [8] about 5.5% Ni: Elinvar: A manufactured alloy whose elasticity does not change with temperature; 5% Cr: 36% Ni: Invar: A steel manufactured to have a very low thermal expansion: 36% Ni: Kamacite: A native metal found in meteoric iron: Fe [0.9] Ni [0.1 ...
The composition of alnico alloys is typically 8–12% Al, 15–26% Ni, 5–24% Co, up to 6% Cu, up to 1% Ti, and the rest is Fe. The development of alnico began in 1931, when T. Mishima in Japan discovered that an alloy of iron, nickel, and aluminum had a coercivity of 400 oersteds (32 kA/m), double that of the best magnet steels of the time.