Revision 233317 of "Austenite" on enwiki

'''Austenite''' is a solid solution of [[carbon]] and [[iron]] that exists in [[steel]] above the critical temperature of 1333°F (about 723°C).  It is named after Sir [[W.C. Roberts-Austen]].  Its [[crystal structure|face-centred cubic]] (FCC) structure allows it to hold a high proportion of carbon.  As it cools, it breaks down into other materials such as [[pearlite]] (a mixture of [[ferrite]] and [[cementite]]), [[martensite]] and [[bainite]].  The rate of cooling determines the relative proportions of these materials and therefore the mechanical properties (e.g. [[hardness]], [[tensile strength]]) of the steel.

The addition of certain other metals, such as [[manganese]], [[nickel]] and [[chromium]], can cause the austenitic structure to survive at room temperature, resulting in [[austenitic steel]].


[[ja:オーステナイト]]{{chem-stub}}