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nonequilibrium back diffusion solidification

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420117
EISBN: 978-1-62708-310-2
... , Met. Sci. , Vol 10 , 1976 , p 77 – 86 10.1179/msc.1976.10.3.77 Equilibrium Freezing of Peritectic Alloys Nonequilibrium Freezing of Peritectic Alloys Peritectic reactions or transformations are very common in the solidification of metals. Many interesting alloys undergo these types...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140165
EISBN: 978-1-62708-264-8
...Abstract Abstract Engineering metals undergo many transformations in the course of production, none more critical than those that occur during solidification. This chapter discusses the process of solidification and its effects on the structure and properties of cast metals. It describes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240095
EISBN: 978-1-62708-251-8
... Coring due to nonequilibrium solidification. Source: Ref 6 Inverse segregation occurs when the solute content at or near the surface is higher than it is at the center—exactly opposite of what is expected. Under certain conditions, channels form between the dendrites that are growing toward...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420015
EISBN: 978-1-62708-310-2
... on diffusion. For example, the important martensitic transformation in steels occurs quite suddenly by a combination of shear mechanisms. Solid-state transformations differ from liquid-to-solid transformations (solidification) in several important ways. In solids, the atoms are bound much tighter than...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120065
EISBN: 978-1-62708-269-3
... welding may use an interlayer for diffusion bonding. The interlayer invariably will be a different alloy than the pieces being bonded. Brazing relies on the melting and subsequent solidification of an interlayer (braze metal) without any melting of the base metal. Most fabrication welding on titanium...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410551
EISBN: 978-1-62708-265-5
.... , Carbide Coating Process by Use of Molten Borax Bath in Japan , J. Heat Treat. , Vol 1 ( No. 2 ), 1979 , p 15 – 22 10.1007/BF02833234 22.47 Arai T. , Fujita H. , Sugimoto Y. , and Ohta Y. , Diffusion Carbide Coatings Formed in Molten Borax Systems , J. Mater. Eng. , Vol...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310001
EISBN: 978-1-62708-286-0
... fcc back to the low-density bcc at still lower temperatures. This is a result of the unpaired 3d orbital electrons (those that give rise to ferromagnetism) that are not given up as valence electrons, causing repulsive forces between atoms and requiring a more widely spaced structure. All...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2016
DOI: 10.31399/asm.tb.ascaam.t59190001
EISBN: 978-1-62708-296-9
... Dendritic Microstructures , Metall. Mater. Trans. A , Vol 45A , 2014 , p 426 – 437 10.1007/s11661-013-1985-3 14. Wang C.Y. and Beckerman C. , Prediction of Columnar to Equiaxed Transition during Diffusion—Controlled Dendritic Alloy Solidification , Metall. Mater. Trans. A , Vol...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980141
EISBN: 978-1-62708-342-3
.... 4.11 Tertiary system representation. (a) Isothermal section (temperature T 1 = constant). (b) Quasi-binary section (alloy component B, e.g., 40%) [ Ber 83 ] 4.2.3 Diffusion, Precipitation, Nonequilibrium The phase diagrams show that in many alloys both the composition of the individual...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230047
EISBN: 978-1-62708-351-5
... that might arise through solidification shrinkage or formation of intermetallic phases. Likewise, the design should not result in undue distortion of the assembly through excessive thermal expansion mismatch strains or the filler metal being too unyielding. The joint is normally required to be resilient...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060197
EISBN: 978-1-62708-261-7
...–1315 300–2400 Continuous processing of heavy loads (walking beam) Continuous processing of long cylindrical parts (screw conveyor) Part size Rotary hearth furnace 315–1315 600–2400 Work normally moves through furnace back to initial loading zone. High-speed heating Modest space requirements...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2004
DOI: 10.31399/asm.tb.ps.t62440049
EISBN: 978-1-62708-352-2
... products where dynamic characteristics, such as resistance to thermal fatigue and creep, are usually of greater importance than quasi-static mechanical strength. The design of the joint should not introduce stress concentrations in the assembly that might arise through solidification shrinkage...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230001
EISBN: 978-1-62708-351-5
... of the other methods. For example, brazed and soldered joints often can be endowed with the advantageous mechanical properties of welded and diffusion-bonded joints; at the same time, in most cases they can be disassembled readily, without detriment to the components, like mechanically fastened joints...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740047
EISBN: 978-1-62708-308-9
...: Ref 3 Fig. 10 Effect of hot isostatic pressing (HIP) on fatigue life of A201.0-T7 aluminum casting. Source: Ref 4 Fig. 3 Solidification in conventional castings. During the growth of the columnar zone, three regions can be distinguished. These are the liquid (L), the liquid-plus...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550033
EISBN: 978-1-62708-307-2
... of heat treatment. Source: Adapted from Ref 2.14 Superplastic forming parameters for aluminum Table 2.16 Superplastic forming parameters for aluminum Alloy Forming temperature Strain rate, s –1 Forming temperature Back pressure Strain, % °C °F MPa psi MPa psi 2004 449...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240527
EISBN: 978-1-62708-251-8
... graphite molds, and by investment casting. Investment casting is used to produce the largest and most complex castings. Since titanium castings can develop porosity during solidification, hot isostatic pressing (HIP) is used to close the internal porosity. Welding before HIP is used to repair any porosity...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2004
DOI: 10.31399/asm.tb.ps.t62440001
EISBN: 978-1-62708-352-2
... characteristics of these joining methods. It presents a comparison between solders and brazes. Further details on pressure welding and diffusion bonding are also provided. Key parameters of soldering are discussed, including surface energy and surface tension, wetting and contact angle, fluid flow, filler...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.9781627082914
EISBN: 978-1-62708-291-4
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.9781627082693
EISBN: 978-1-62708-269-3
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000005
EISBN: 978-1-62708-312-6
... as the gamma phase (γ). Upon further heating through 1400 °C (2552 °F), it undergoes transformation back to the ferritic structure. The lower- temperature version of the ferritic phase is called alpha ferrite (α), and the higher-temperature version of the ferritic phase is known as delta ferrite (δ). (Both...