Results 231 to 240 of about 14,485 (279)

The thermal stabilization of austenite

Acta Metallurgica, 1966
Abstract It is proposed that the thermal stabilization of austenite occurs because of the pinning of martensite nucleus-austenite matrix interfaces by segregated carbon. The kinetics of thermal stabilization implicit in this model are quantitatively developed and compared with reported austenite stabilization behavior.
K.R Kinsman, J.C Shyne
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Thermal and Mechanical Stability of Austenite in Metastable Austenitic Stainless Steel

Metallurgical and Materials Transactions A, 2019
The roles of grain size, texture, strain, and strain rate on the thermal and mechanical stability of austenite in AISI 321 metastable austenitic stainless steel were studied. Ultrafine grain (UFG), fine grain (FG), and coarse grain (CG) specimens with average grain sizes of 0.24, 3, and 37 µm sizes, respectively, were investigated.
A. A. Tiamiyu, Shiteng Zhao, Zezhou Li, A. G. Odeshi, J. A. Szpunar   +4 more
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Sensitization of manganese-stabilized austenitic steels

Proceedings, annual meeting, Electron Microscopy Society of America, 1990
In an earlier study of the phase stability of manganese-stabilized austenitic steels based on Fe-12 Cr-20 Mn-0.25 C (wt %), significant precipitation of tau carbides (M23C6) was found to occur both in the matrix and at grain boundaries during aging near 600°C.
E. A. Kenik, G. E. C. Bell, P. F. Tortorelli   +2 more
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Instabilities in stabilized austenitic stainless steels

Metallurgical Transactions A, 1992
The effect of aging on the precipitation of grain boundary phases in three austenitic stainless steels (AISI 347, 347AP, and an experimental steel stabilized with hafnium) was investigated. Aging was performed both on bulk steels as well as on samples which were subjected to a thermal treatment to simulate the coarse grain region of the heat affected ...
Raghavan Ayer, C. F. Klein, C. N. Marzinsky   +2 more
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Thermal stabilization of austenite

Metal Science and Heat Treatment, 1972
1. To determine the thermal stabilization characteristic of austenite the complex magnetometric method that requires special apparatus can be replaced with measurements of the hardness. 2. There is a good correlation between the results obtained by measuring the hardness and the data obtained by magnetic analysis.
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Phase stability of a manganese-stabilized austenitic stainless steel

Proceedings, annual meeting, Electron Microscopy Society of America, 1989
Development of manganese-stabilized stainless steels has been prompted by two objectives: (1) replacement of nickel, normally used to stabilize austenitic stainless steels, since it is an expensive, strategic material, and (2) reduction of long-term induced radioactivity of neutron-irradiated stainless steels by replacing nickel, molybdenum, and ...
E.A. Kenik, P.J. Maziasz, R.L. Klueh
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Effect of Austenite Stability on Pack Aluminizing of Austenitic Stainless Steels

JOM, 2014
Aluminide coatings were applied to the surfaces of several austenitic stainless steels—UNS S30300, S30400, S30900, S31000, and S31600 (Type 303, 304, 309, 310, and 316)—by the halide activated pack cementation process. The coating compositions, microstructures, and hardness were determined for the different steels coated at 850°C for 25 h.
Christopher Lopez, Armen Kvryan, Shahan Kasnakjian, Armando Coronado, Sutine Sujittosakul, Obed Villalpando, Vilupanur A. Ravi   +6 more
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Phase stability of reduced-activation Mn-stabilized austenitic steels

Journal of Nuclear Materials, 1992
Abstract The thermal aging response of three Mn-stabilized austenitic alloys: Fe15Cr15Mn, Fe10Cr30Mn and Fe30Mn, is characterized as a function of aging time and temperature using optical metallography, analytical electron microscopy, microhardness, and magnetic susceptibility measurements.
J.I. Cole, D.S. Gelles, J.J. Hoyt
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Microstructural stability during creep of a niobium-stabilized austenitic steel

Acta Metallurgica, 1981
Abstract Creep tests combined with transmission electron microscopy have been carried out on a niobium stabilized austenitic stainless steel which has been subject to a multi-mechanical thermal treatment (MMTT). It is found that the substructure introduced by the MMTT creates two distinct creep regimes, separated by a narrow transition temperature or
S. Nategh, P.J. Goodhew, Z.C. Szkopiak
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Lattice expansion of carbon-stabilized expanded austenite

Scripta Materialia, 2010
The lattice parameter of expanded austenite was determined as a function of the content of interstitially dissolved carbon in homogeneous, carburized thin stainless steel foils. For the first time this expansion of the face-centered cubic lattice is determined on unstrained austenite.
Thomas S. Hummelshøj, Thomas L. Christiansen, Marcel A.J. Somers   +2 more
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