Topic
Austenite
About: Austenite is a research topic. Over the lifetime, 36691 publications have been published within this topic receiving 514814 citations. The topic is also known as: gamma-phase iron.
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TL;DR: In this article, the authors computed and measured austenite and ferrite phase equilibria data in the temperature range 850 °C to 1300 °C for four commercial duplex stainless steels and compared the level of agreement between calculation and experiment.
Abstract: Computed and measured austenite and ferrite phase equilibria data in the temperature range 850 °C to 1300 °C for four commercial duplex stainless steels are presented and compared The level of agreement between calculation and experiment shows that computation of phase equilibria based on assessed thermodynamic data is a powerful tool, capable of providing useful information on higher-order systems that can be used as a basis for alloy design in iron-based and other alloy systems
15 citations
TL;DR: In this paper, a low carbon, low-alloy steel was intercritically heat treated and thermomechanically processed to study the martensitic hardenability of austenite present.
Abstract: A low-carbon, low-alloy steel was intercritically heat treated and thermomechanically processed to study the martensitic hardenability of austenite present. Rolling of the two-phase (α+γ) microstructure elongated austenite particles and reduced their martensitic hardenability because the α/γ interface where new ferrite forms during cooling was increased by the particle elongation. The martensite particles obtained in rolled material were also elongated or fibered in the rolling direction. Therefore, the thermomechanical processing of a two-phase (α+γ) mixture has the detrimental effect of increasing the quenching power needed to yield a specific amount of martensite.
15 citations
Patent•
29 May 1995
TL;DR: In this paper, a steel having a specified compsn.C constituted of C, Si, Mn, P, S and Fe is subjected to tube making, and the steel tube is hardened at 850 to 1000 deg.C and is tempered at 450 deg.
Abstract: PURPOSE: To produce a high strength and high toughness steel tube excellent in workability by subjecting a steel having a specified compsn. constituted of C, Si, Mn, P, S and Fe to tube making, thereafter executing specified hardening and tempering, subjecting it to cold drawing and thereafter executing annealing at a specified temp. CONSTITUTION: A steel having a compsn. contg. 0.05 to 0.15% C, <=0.50% Si, 0.50 to 2.00% Mn, <=0.020% P and <=0.020% S, contg., if necessary, one or more kinds among 0.05 to 0.50% Mo, 0.02 to 0.10% V, 0.05 to 0.50% Ni, 0.05 to 1.00% Cr, 0.05 to 0.50% Cu, 0.02 to 0.10% Ti, 0.02 to 0.10% Nb and 0.0005 to 0.005% B, and the balance Fe with inevitable impurities is subjected to tube making. This steel tube is hardened at 850 to 1000 deg.C and is tempered at 450 deg.C to less than the Ac1 transformation point to obtain fine and uniform austenitic grains. After that, the steel subjected to cold drawing of prescribed dimension. Next, the steel tube is subjected to softening at 450 deg.C to less than the Ac1 transformation point, preferably at about 500 to 650 deg.C.
15 citations
TL;DR: In this paper, permanent moulded high chromium irons were prepared in the laboratory and erosion resistance of these castings were assessed using jet erosion test, the composition and heat treatment in permanent molded casting is varied so as to obtain different carbide volume fraction and austenite levels in the microstructure.
15 citations
TL;DR: In this paper, the authors evaluated two types of austempered ductile iron: one with a higher strength and the other with higher ductility, and showed that the thinner material is optimal due to its lower weight and higher mass effectiveness.
15 citations