austenite
IPA: ˈɔstɪnaɪt
noun
- A solid solution of carbon or ferric carbide in iron that exists in steel at high temperatures.
- a fan or admirer of Jane Austen; someone who studies the works of Jane Austen.
- (metallurgy) Alternative letter-case form of austenite [A solid solution of carbon or ferric carbide in iron that exists in steel at high temperatures.]
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Examples of "austenite" in Sentences
- This process converts remaining austenite in the steel to martensite.
- Austenite is formed by withdrawal of carbon atoms from cementite into ferrite.
- The steel is heated to a temperature above its austenite conversion temperature.
- The structure is then austenite and the air-cooled structure of this steel is martensite.
- If a piece of steel could be cooled instantly, doubtless austenite could be preserved and examined.
- Higher percentages of nickel change the martensitic structure to austenite, the steel then being non-magnetic.
- Chromium steels are therefore capable of great hardness, due to the rapid cooling being able to retard the decomposition of the austenite.
- However, if the heating has gone above the critical very far, the austenite crystals start to grow; a very short time at an extreme temperature will cause
- The growth is continually destroyed by the hammering, which should consequently be continued down to the upper critical temperature when the austenite crystals break up into ferrite and cementite.
- In order to produce quick and intense carburization the iron should preferably be above its upper critical temperature or 1,600°F., -- therefore the carbon absorbed immediately goes into austenite, or solid solution.
- He suggested to me a theoretical problem left over from his work during the war on the cooling of steel through the austenite-pearlite transition, and I learned a fair amount of metallurgy in order to understand the physical basis of the phenomenon.
- In the ordinary practice of hardening steels, the quenching is not so drastic, and the transformation of austenite back to ferrite and cementite is more or less completely effected, giving rise to certain transitory forms which are known as "martensite," "troostite," "sorbite," and finally, pearlite.
- There are several theories to explain this reaction, but generally it is only necessary to remember that in hardening we quench steel from the austenite phase, and, due to this rapid cooling, the normal change from austenite to the eutectoid composition does not have time to take place, and as a consequence the steel exists in a partially transformed, unstable and very hard condition at atmospheric temperatures.