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Book Chapter
Book: Alloy Phase Diagrams
Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006226
EISBN: 978-1-62708-163-4
... Abstract Similar to the eutectic group of invariant transformations is a group of peritectic reactions, in which a liquid and solid phase decomposes into a solid phase on cooling through the peritectic isotherm. This article describes the equilibrium freezing and nonequilibrium freezing...
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Published: 01 December 2008
Fig. 1 Typical peritectic phase diagrams. (a) Peritectic reaction α + liquid → β and peritectoid reaction α + β → γ. (b) Peritectic formation of intermetallic phases from a high-melting intermetallic. (c) Peritectic cascade between high- and low-melting components. Source: Ref 1
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Published: 27 April 2016
Fig. 2 Typical peritectic phase diagrams. (a) Peritectic reaction α + liquid → β and peritectoid reaction α + β → γ. (b) Peritectic formation of intermetallic phases from a high-melting intermetallic. (c) Peritectic cascade between high- and low-melting components. Adapted from Ref 1
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Published: 01 December 2004
Fig. 19 Typical peritectic phase diagrams. (a) Peritectic reaction α + liquid → β and peritectoid reaction α + β → γ. (b) Peritectic formation of intermetallic phases from a high-melting intermetallic. (c) Peritectic cascade between high- and low-melting components. Source: Ref 2
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Published: 01 December 2008
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Published: 01 December 2008
Fig. 3 Mechanisms of peritectic reaction and transformation. (a) Lateral growth of a β-layer along the α/liquid interface during peritectic reaction by liquid diffusion. (b) Thickening of a β-layer by solid-state diffusion during peritectic transformation. The solid arrows indicate growth
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Published: 01 December 2008
Fig. 5 Start of the peritectic reaction in a directionally solidified Cu-20Sn alloy. Primary α-dendrites (white) are covered by peritectically formed β-layer (gray) shortly after the temperature reaches T p . Matrix (dark) is a mixture of tin-rich phases. Mechanically polished, etched in HNO
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Published: 01 December 2008
Fig. 6 Start of the peritectic reaction in a directionally solidified Cu-70Sn alloy. The primary ε-phase (dark) is covered by the peritectically formed η-layer (white), which thickens with increasing undercooling below T p . The matrix is the Sn-η eutectic. Mechanically polished, etched
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Published: 01 December 2008
Fig. 9 Microstructure in a Cd-10Cu sample that has passed a peritectic reaction. The primary Cu 5 Cd 8 crystals are white, the dark matrix is cadmium, and the peritectically formed CuCd 3 is gray.
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Published: 01 December 2008
Fig. 12 Temperature range of peritectic reaction in iron-carbon alloys as a function of carbon content and the solidification rate. The temperature gradient, G , is 6000 K/m.
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Published: 01 December 2008
Fig. 15 Nickel distribution after peritectic reaction in a steel containing 4 wt% Ni. The temperature gradient was 60 K/cm. Calculations were made at different solidification rates. The dotted line shows the nickel distribution at the start of the peritectic reaction. δ is primary ferrite, γ
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Published: 01 December 2008
Fig. 19 Three stages of a peritectic reaction in a unidirectionally solidified high-speed steel. (a) First-stage structure. Dark gray is austenite, white is ferrite. The mottled structure is quenched liquid. (b) Subsequent peritectic transformation of (a). (c) Further peritectic transformation
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Published: 01 December 2004
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Published: 01 December 2004
Fig. 53 Peritectic reaction and transformation of Fe-0.14C alloy during solidification and at 1768 K ( GT = 4.3 K/mm, cooling rate = 20 K/min). (a) 0 s. (b) 1 30 s. (c) 2 s. Source: Ref 28
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Published: 01 December 2004
Fig. 54 Peritectic reaction and transformation of Fe-0.42C alloy during isothermal holding at 1765 K (same scale). (a) 0 s. (b) 0.2 s. (c) 3 s. (d) 7 s. Source: Ref 28
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Published: 01 December 2004
Fig. 9 Three stages of peritectic reaction in a directionally solidified high-speed steel. (a) First-stage structure. Dark gray is austenite; white is ferrite. The mottled structure is quenched liquid. (b) Subsequent peritectic transformation of (a). (c) Further peritectic transformation of (b
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Published: 01 December 2004
Fig. 11 Light micrograph illustrating the peritectic reaction for α p in a Ti-48Al alloy. Source: Ref 26
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Published: 01 December 2004
Fig. 12 Transmission electron micrograph illustrating the peritectic reaction for γ p in a Ti-52Al alloy. Source: Ref 26
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Published: 27 April 2016
Fig. 6 Mechanisms of peritectic reaction and transformation. (a) Lateral growth of a β layer along the α-liquid interface during peritectic reaction by liquid diffusion. (b) Thickening of a β layer by solid-state diffusion during peritectic transformation. The solid arrows indicate growth
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Image
Published: 27 April 2016
Fig. 9 Start of the peritectic reaction in a directionally-solidified Cu-20Sn alloy. Primary α dendrites (white) are covered by peritectically formed β layer (gray) shortly after the temperature reaches T p . Matrix (dark) is a mixture of tin-rich phases. Original magnification: 40×. Source
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