Results 171 to 180 of about 22,622 (212)
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Grain growth in austenitic stainless steels
Metallography, 1969Abstract Despite the extensive use of Type 347 stainless-steel tubing for regeneratively cooled thrust chambers, very little is known about its grain growth characteristics. Lacking, also, is information on the other 18 Cr8 Ni austenitic steels. Therefore, grain growth curves for AISI Type 304, 316, and 321 were obtained and compared.
J.K. Stanley, A.J. Perrotta
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Grain boundary chromium depletion in austenitic alloys
Journal of Materials Science, 2010It is widely accepted that thermally induced grain boundary chromium depletion in austenitic alloys such as austenitic stainless steels and Ni base alloys can lead to inter-granular stress corrosion cracking (IGSCC) of high temperature components during service.
Youfa Yin +4 more
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Stem imaging of prior austenite grain boundaries
Scripta Materialia, 2000The problem of temper embrittlement of low-alloy steels used in steam-turbine generators was thought to have been solved by the introduction of clean steels with low levels of certain impurities. However, even these steels exhibit temper embrittlement at turbine operation temperatures >400 C. Initial studies of temper embrittlement of clean steels used
Adam J Papworth, David B Williams
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Dislocation configurations through austenite grain misorientations
International Journal of Fatigue, 2015In the present investigation, many strain controlled low cycle fatigue experiments of metastable austenitic stainless steel were performed at various total strain amplitudes under ambient temperature where the strain rate was kept constant. Dislocation cell developed due to strain cycling was measured through extensive analytical transmission electron ...
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Austenite Grain Growth in High Manganese Steels
Metallurgical and Materials Transactions A, 2019Grain growth in high-manganese steel (HMS) was studied at high temperatures (1273 K to 1473 K). Grain growth was found to be two orders of magnitude slower than that in a commercial low-Mn steel, as indexed by average experimentally determined mobilities.
Bhattacharyya, Madhumanti +3 more
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Grain growth in austenitic stainless steels
Metallography, 1978Recent studies on the sintering of 304L stainless steel powder compacts showed an intimate coupling of the grain growth and densification processes. The effect was particularly dominant in the intermediate stage of sintering in which the pore structure became rounded, temperatures in excess of 1330K, and times in excess of one hour.
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Growth of austenite grains during induction heating
Metal Science and Heat Treatment, 19631. The minimum grain size resulting from induction heating is determined by the initial size of the austenite grains, which, in turn, depends on the size of the elements of the original structure 2. Changes in the rate of induction heating between 8 and 1000 deg/sec do not affect the size of the initial grains.
V. D. Zelenova +2 more
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Modeling the Effect of Austenite Grain Size Distribution on Austenite Decomposition Kinetics
Materials Science Forum, 2007The model of the γ→α transformation calculated with the CATRAN program is described. The expected effect of former austenite grain size on the transformation kinetics as well as the final microstructure is analyzed and compared with experimental data.
Andrej Samoilov +4 more
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Grain growth in heat-resistant austenitic steels
Metal Science and Heat Treatment, 1985In this work a study was made of grain growth kinetics in steels of the 37KhI2N8G8 type alloyed with V, Nb, Ti, Mo, and W (see Table i). Steels were melted in an electric arc furnace. Ingots obtained by vacuum casting after a homogenizing anneal at I050°C for 8 h were forged into bars 15 × 15 mm in section at I180-900°C.
I. K. Denisova +3 more
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Modeling of Austenite Grain Growth During Austenitization in a Low Alloy Steel
Journal of Materials Engineering and Performance, 2015The main purpose of this work is to develop a pragmatic model to predict austenite grain growth in a nuclear reactor pressure vessel steel. Austenite grain growth kinetics has been investigated under different heating conditions, involving heating temperature, holding time, as well as heating rate.
Dingqian Dong, Fei Chen, Zhenshan Cui
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