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Grain size
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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1996
DOI: 10.31399/asm.tb.phtpclas.t64560439
EISBN: 978-1-62708-353-9
... Abstract This appendix lists the relationship between the ASTM grain size and the average "diameter" of the grain. This appendix is a table adapted from the 1966 Annual Book of ASTM Standards , Part 31, American Society for Testing and Materials, Philadelphia (1966). Copyright ASTM...
Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140071
EISBN: 978-1-62708-264-8
... Abstract Grain size has a determining effect on the mechanical properties of steel and responds favorably to forging and heat treating. This chapter explains how to measure and quantify grain size and how to control it through thermal cycling and forging operations. It describes how surface...
Abstract
Grain size has a determining effect on the mechanical properties of steel and responds favorably to forging and heat treating. This chapter explains how to measure and quantify grain size and how to control it through thermal cycling and forging operations. It describes how surface tension acting on grain-boundary segments contributes to grain growth and how the formation of new grains, driven by phase transformations and recrystallization, lead to a reduction in average grain size. It also discusses the effect of alloying elements on grain growth rates, particularly the curbing effect of particle and solute drag.
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Published: 01 August 2015
Fig. 5.27 Grain size No. 8. Upper, idealized hexagonal network for mean grain size No. 8, ASTM scale, 128 grains/in. 2 . Lower, ASTM standard grain size No. 8, 96 to 192 grains/in. 2 . 50×. Source: Ref 11
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Published: 01 August 2015
Fig. 5.28 Grain size No. 3. Left, idealized hexagonal network for mean grain size No. 3, ASTM scale, 4 grains/in. 2 . Right, ASTM standard grain size No. 3, 3 to 6 grains/in. 2 . 50×. Source: Ref 11
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Published: 01 December 1999
Fig. 5.7 Comparison of nominal ASTM 6 to 9 grain size (with calculated grain size numbers of 6.08, 7.13, 8.03, and 8.97, respectively). Nital etch, 100×
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Published: 01 January 1998
Fig. 13-9 Austenite grain size (as measured by ASTM grain size number) in H13 tool steel as a function of austenitizing temperature for specimens soaked for various times. Source: Ref 6
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Published: 01 July 2009
Fig. 17.59 Effect of temperature on the BeO particle size and grain size of high-purity hot isostatically pressed beryllium. Source: Borch 1979
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in Forming of Titanium Plate, Sheet, Strip, and Tubing[1]
> Titanium: Physical Metallurgy, Processing, and Applications
Published: 01 January 2015
Fig. 11.8 Superplastic forming is strongly dependent on grain size. Effect of grain size on (a) strain rate of superplastic deformation for Ti-6Al-4V and Ti-5Al-2.5Sn alloys and (b) superplastic deformation temperature for Ti-6.5Al-3.3Mo-1.8Zr-0.26Si alloy
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in Deformation and Recrystallization of Titanium and Its Alloys[1]
> Titanium: Physical Metallurgy, Processing, and Applications
Published: 01 January 2015
Fig. 5.25 Effect of annealing temperature on grain size of Ti-5Al-2.5Sn. Grain growth is very rapid at the beta transus temperature (1015 °C, or 1860 °F) and higher.
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Published: 01 December 1999
Fig. 5.3 Relationship between austenitizing parameters and grain size for grain-refined and non-grain-refined AISI 1060 steel. (a) Effect of austenitizing temperature (2 h soak). (b) Effect of austenitizing time. Source: Ref 5
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Published: 01 January 2015
Fig. 8.20 Prior-austenite grain structure showing large difference in grain size in an SAE 8620 steel subjected to a simulated carburizing treatment after specimen has been cold worked 75%. Light micrograph; special picral etch. Source: Ref 8.34
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Published: 01 July 2009
Fig. 1.10 Creep deformation maps for MAR-M200. (a) Grain size = 100 μm. (b) Grain size = 1 cm. Source: Ref 1.7
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Published: 30 April 2020
Fig. 8.13 Copper data for grain size versus sintering time, plotted on a log-log format to show the one-third power law relation that is characteristic of grain-boundary diffusion. The data were taken for various times at 850 °C (1560 °F).
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Published: 30 April 2020
Fig. 8.15 Cumulative grain size data for magnesia after sintering to full density. The square symbols are the experimental results, and the solid line represents the Weibull distribution.
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Published: 30 April 2020
Fig. 8.16 Nickel sintering data for grain size versus the inverse square root of the fractional porosity. Sintering is at 900 °C (1650 °F) using 4.3 μm powder. Coarsening during sintering results in a grain size of 33 μm at 6.3% porosity.
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in Case Studies of Powder-Binder Processing Practices
> Binder and Polymer Assisted Powder Processing
Published: 30 April 2020
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in Case Studies of Powder-Binder Processing Practices
> Binder and Polymer Assisted Powder Processing
Published: 30 April 2020
Fig. 10.16 Grain size versus the inverse square root of the fractional porosity (1/(1 – f ) ½ ) for a variety of sintering conditions. The starting grain size is 7.6 μm.
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in Case Studies of Powder-Binder Processing Practices
> Binder and Polymer Assisted Powder Processing
Published: 30 April 2020
Fig. 10.22 Plot of carbide grain size and cobalt content, showing traces of Vickers hardness and nominal application areas
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in Case Studies of Powder-Binder Processing Practices
> Binder and Polymer Assisted Powder Processing
Published: 30 April 2020
Fig. 10.29 Plot of carbide grain size and composition showing the effects on hardness for straight WC-Co cemented carbides
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in Case Studies of Powder-Binder Processing Practices
> Binder and Polymer Assisted Powder Processing
Published: 30 April 2020
Fig. 10.32 Grain size versus density for 0.45 μm alumina sintered at 1620 °C (2950 °F). The lower-melting-temperature iron oxide segregates to grain boundaries and increases grain growth, while the high-melting-temperature magnesium oxide segregates to grain boundaries to retard grain growth
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