A solution of carbon or iron carbide in gamma iron. Its carbon content at maximum solubility (2065° F) can vary from 0 to 1.7 percent. This solubility decreases with temperature to 0.85 percent at 1333° F.
This is the name for any solid solution in which gamma iron is the solvent. It is a phase in steel where it consists of face-centered cubic iron with carbon in solid solution. It is non-magnetic and unstable at room temperature. Austenite is a structure name and means nothing as to composition. It is the structure from which all quenching heat treatments must start.
Type of crystal structure of iron or steel, usually stable only at high temperatures. The addition of suitable elements, such as nickel, can render it stable also at room temperatures. Not magnetic (see AUSTENITE STAINLESS STEEL).
A solid solution of steel in which small carbon atoms are trapped within larger iron atoms. This structure is generally unstable at room temperature. It is a phase through which steel passes on the way to becoming hard martensite or soft pearlite or ferrite.
A solid solution in which gamma iron (face centered crystal structure) is the solvent. In low carbon steel austenite exists above 1670 F (910 C). In austinetic stainless steels austenite exists between room temperature and the melting point.
austenitic Austenite is a solid solution of carbon and iron that exists in steel above the critical temperature. It is named after Sir W.C. Roberts-Austen. It is face-centred cubic (FCC) in structure. See also martensite
Phase in certain steels, characterized as a solid solution, usually off carbon or iron carbide, in the gamma form of iron. Such steels are known as “austenitic”. Austenite is stable only above 1333°F. in a plain carbon steel, but the presence of certain alloying elements, such as nickel and manganese, stabilizes the austenitic form, even at normal temperatures.
A nonmagnetic solid solution of ferric carbide or carbon in iron. An elevated-temperture parent phase in ferrous metals from which all other low-temperature structures are derived. The normal structures are derived. The normal condition of certain types of stainless steels.
Crystallographic description of the high temperature phase of a shape memory alloy, which starts to form during heating of the low temperature phase Martensite when the As-temperature is passed. The formation of Austenite is completed above the Af-temperature.
Austenite (or gamma phase iron) is a metallic non-magnetic solid solution of iron and an alloying element. In plain-carbon steel, austenite exists above the critical eutectoid temperature of 1333 Â°F (about 723 Â°C); other alloys of steel have different eutectoid temperatures. It is named after Sir William Chandler Roberts-Austen (1843-1902).