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The determination of austenite grain size in ferrous metals
Metallography, 1981Abstract A simple uncomplicated method is introduced to render the austenite grain boundaries visible at room temperature. The suggested method is inexpensive and time saving and may be used universally. This is demonstrated on eleven ferrous materials and a good reproducibility is shown.
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Austenitic grain size of hydroextruded high-speed steels
Metal Science and Heat Treatment, 19811. To obtain a fine and uniform austenitic grain size in hardening of hydroextruded steels, a post-deformation temper at 500°C is recommended. After hydroextrusion with large degrees of deformation (">30%), heating to temperatures close to the Ac1 point (750°C) with short holds (5–10 min) may be used. 2.
A. A. Lyadskaya +2 more
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Different austenite grain size in nonuniformly deformed billets
Metal Science and Heat Treatment, 1991Grain growth in steels during carburizing or carbonitriding is often accompanied by the occurrence of a varied grain size. Authors explain this phenomenon by the presence of impurities and excess phases along grain boundaries which restrain their growth.
S. S. D'yachenko, E. A. Kuz'menko
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Austenite and ferrite grain sizes in interstitial free steel
Materials Science and Technology, 1995AbstractAn oxidation method has been employed to reveal prior austenite grain boundaries in C–Mn and interstitial free (IF) steels. The ability of this technique to reveal prior austenite grain boundaries is assessed by comparing its results with those of an etching method applied on the C–Mn steel.
G. H. Akbari +2 more
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Effect of ultrasonic vibrations on grain size in austenite and pearlite
Metal Science and Heat Treatment of Metals, 19621. Ultrasonic vibrations applied during heating coarsen the austenite grain, and this leads to the formation of coarse acicular martensite. 2. The application of ultrasonic vibrations during cooling when the austenite is changing into pearlite helps to make the pearlite grain finer.
A. G. Vasil'yeva, T. Ye. Kobtseva
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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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Isothermal martensite: Austenite grain size and kinetics of ‘spread’
Materials Science and Technology, 2008Martensite reaction is a heterogeneous transformation. Frequently, it starts in a few austenite grains and proceeds by nucleation of additional martensite units in the partially transformed grains as well as in untransformed ones, thus spreading the transformation throughout.
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Effect of austenite grain size on the ductility of steel 9KHF
Metal Science and Heat Treatment of Metals, 19611. The ductility of steel 9KhF in cast and forged states over the interval of 750–1230°C depends on the austenite grain size. The coarser the grain, the lower is the steel plasticity and the more susceptible it is to cracking in the process of deformation at temperatures close to the lower range of forging temperatures (750–900°C).
G. M. Belkov, N. T. Litenko
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Grain-to-grain variations in NbC particle size distributions in an austenitic stainless steel
Journal of Materials Science, 1979Quantitative information has been obtained concerning the size distributions of NbC precipitate particles in different grains in a deformed and aged austenitic stainless steel specimen. The precipitate size distributions obtained differ from one grain to another.
C. Y. Barlow +3 more
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Size distribution of austenite grains and disperse particles in steel
Russian Metallurgy (Metally), 2007The physicomechanical properties of steels depend substantially on the austenite grain size and the uniformity of the size distribution of grains. Variation in the grain size of steel degrades many of its properties. In particular, this variation can cause nonuniform phase transformations in steel, when bainite forms in more stable coarse austenite ...
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