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Austenite, also known as gamma-phase iron (γ-Fe), is a metallic, non-magnetic allotrope of iron or a solid solution of iron with an alloying element. [1] In plain-carbon steel , austenite exists above the critical eutectoid temperature of 1000 K (727 °C); other alloys of steel have different eutectoid temperatures.
Austinite is a member of the adelite-descloizite group, adelite subgroup, the zinc (Zn) end member of the copper-Zn series with conichalcite.It is the zinc analogue of cobaltaustinite and nickelaustinite. [4]
1301 – King Andrew III died without any male heirs, ending the Árpád dynasty, which had ruled Hungary since the late 9th century.; 1900 – Giacomo Puccini's opera Tosca (poster pictured), based on the play La Tosca by French dramatist Victorien Sardou, premiered at the Teatro Costanzi in Rome.
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Telluric iron is an extremely rare metal, found only in a few places in the world. Like meteorites, the very coarse Widmanstätten structures most likely develop through very slow cooling, except that the cooling occurred in the Earth's mantle and crust rather than in the vacuum and microgravity of space. [17]
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Calculated metastable miscibility gap in the Fe-Cr binary system (remake of [16] [17]) [1]. Duplex stainless steel can have limited toughness due to its large ferritic grain size, and its tendencies to hardening and embrittlement, i.e., loss of plasticity, at temperatures ranging from 250 to 550 °C (482 to 1,022 °F), especially at 475 °C (887 °F). [18]
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