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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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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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Austenite grain growth in structural steel with titanium
Metal Science and Heat Treatment, 19721. The presence of titanium nitrides in steel 15KhGNTA prevents formation of large grains by coalescence in the first temperature range of austenite grain growth (950–1050°C). 2. The reduction in the concentration of nitrides is small after VAR and ESR, although the reduction is sufficient to prevent coalescence of grains in the first ...
S. V. Zagulyaeva, M. I. Vinograd
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Mechanism of austenite grain growth in structural steels
Metal Science and Heat Treatment, 19751. The use of high-temperature metallography and a vacuum stage makes it possible to reveal different mechanisms of austenite grain growth in carbon and alloy structural steels. 2. It was found that austenite grain growth occurs at 850–1250° by three different mechanisms: I) resorption of grains; II) formation of new boundaries and ...
M. I. Vinograd +2 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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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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Investigation of the Austenite Grain Growth in HY-TUF Steel
Solid State Phenomena, 2020The high strength silicon steel HY-TUF, applied for manufacturing of the heavy loaded aerospace and engineering parts, was investigated. The effect of the heating temperature in the range 900...1000 °C on the austenite grain size was studied. The steel under consideration had a significant scatter of the austenite grain size.
Mikhail V. Maisuradze, Maxim A. Ryzhkov
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Austenite grain growth in a nuclear pressure vessel steel
Materials Science and Engineering: A, 2013Abstract There is uncertainty on the physical significance of models applied to the coarsening of austenite grains in nuclear pressure vessel steels. As a result, new data are generated and analysed by adapting standard theory to account for the initial austenite grain size generated when the steel becomes fully austenitic, and any growth during ...
H. Pous-Romero +3 more
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Austenite grain growth kinetics and the grain size distribution
2009The aims of this work are to assess the kinetics of austenite grain growth, and to estimate the three dimensional grain size distribution. Measurements are to be used for the validation of a statistical model for the estimation of the kinetics of austenite grain growth during hot strip rolling.
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