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Book Chapter

By Sujoy Krishna Chaudhury
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005229
EISBN: 978-1-62708-187-0
... Abstract Homogenization, in a broad sense, refers to the processes designed to achieve uniform distribution of solutes or phases in a given matrix. This article addresses the root cause for inhomogeneities in cast components. It is nearly a standard industrial practice to homogenize alloys...
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Published: 01 February 2024
Fig. 16 Influence of alternating gas flow direction on cooling curve homogeneity for helium quenching of gears with 10 bar. (a) Batch structure. (b) Thermocouple positions. Cooling curves (c) without and (d) with alternating gas flow direction every 10 s More
Book Chapter

By Paul D. Jablonski
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006257
EISBN: 978-1-62708-169-6
... Abstract Homogenization heat treatment can be useful for improving the performance and life of an alloy while in service or for improving the processability during fabrication and hot working. This article describes the identification of incipient melt point, slowest-diffusing elements...
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Published: 01 December 2004
Fig. 4 Miscibility gap. Region 1: homogenous α is stable. Region 2: homogenous α is metastable, only incoherent phases can nucleate. Region 3: homogeneous α metastable, coherent phases can nucleate. Region 4: homogeneous α unstable, spinodal decomposition occurs. Source: Ref 4 More
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Published: 27 April 2016
Fig. 16 Miscibility gap. Region 1: Homogenous α is stable. Region 2: Homogenous α is metastable; only incoherent phases can nucleate. Region 3: Homogeneous α is metastable; coherent phases can nucleate. Region 4: Homogeneous α is unstable; spinodal decomposition occurs. Source: Ref 10 More
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Published: 01 January 1986
Fig. 21 FMR in amorphous FeB showing the difference between (a) a homogeneous sample and (b) an inhomogeneous sample. Secondary ion mass spectroscopy suggested that both samples were identical. More
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Published: 01 January 1986
Fig. 4 Types of scattering curves. (a) Widely separated homogeneous spheres. (b) Phase separated blend, block copolymer, a metallic alloy, or a glass. (c) A random structure. (d) A liquid or glass with no structure. More
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Published: 01 January 1986
Fig. 65 Homogeneous dislocation tangle in δ-ferrite deformed to fracture in tension at 4 K. Thin foil TEM specimen More
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Published: 01 January 1990
Fig. 15 CMSX-2 element homogenization effect. Source: Ref 21 More
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Published: 01 January 1990
Fig. 18 Homogeneous deformation in CMSX-2 ( T 2 heat treatment) after 0.16% creep strain at 760 °C (1400 °F). Source: Ref 29 More
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Published: 01 January 2005
Fig. 6 As-VARed structure following homogenization. Courtesy of Special Metals Corporation More
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Published: 01 January 2005
Fig. 7 (a) Flow stress and (b) strain to failure as a function of homogenization time at 523 °C (975 °F). Deformation temperature is 493 °C (920 °F). More
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Published: 01 January 2005
Fig. 6 Modified metal flow patterns for extrusion. S, homogeneous deformation with very low friction on billet/container interface; A, homogeneous deformation with low friction on billet/container interface; B, homogeneous deformation with moderate friction on billet/container interface; C More
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Published: 01 December 2004
Fig. 4 Micrograph of cast and homogenized 6061 aluminum alloy, showing the precipitate-free zone (PFZ) (lack of Mg 2 Si precipitates) at grain boundary. The PFZ was created by the lack of silicon, which is wrapped up in the AlFeSi precipitates at the grain boundary. Source: Ref 4 More
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Published: 01 December 2004
Fig. 5 Examples of isomorphous elements with homogenous solid solution over the range of compositions. (a) Solidification region of copper-nickel phase diagram. (b) Hafnium-zirconium phase diagram with an isomorphism during solidification (L → β) and a solid-state isomorphism (β → α). Source More
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Published: 27 April 2016
Fig. 14 Free-energy curves for homogeneous nucleation. Source: Ref 2 More
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Published: 30 September 2015
Fig. 5 Process steps of Homogenous Metals, Inc. to produce powdered metal billets. Used with permission from MIT More
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Published: 30 September 2015
Fig. 3 Ball milling (left) and attritor milling (right) are used to homogenize the powder mixture and reduce particle size. More
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Published: 31 October 2011
Fig. 6 Schematic illustrations of homogeneous (a and b) and heterogeneous (c and d) nucleation. Figures on the left are for a temperature above the melting point. Figures on the right are for a temperature below the melting point. The wetting angle, θ, is shown in (d). More
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Published: 31 October 2011
Fig. 8 Comparison of free-energy changes associated with homogeneous nucleation, heterogeneous nucleation, and fusion welding More