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peritectoid transformation

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Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006228
EISBN: 978-1-62708-163-4
... Abstract Eutectoid and peritectoid transformations are classified as solid-state invariant transformations. This article focuses primarily on the structures from eutectoid transformations with emphasis on the classic iron-carbon system of steel. It reviews peritectoid phase equilibria...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003734
EISBN: 978-1-62708-177-1
... Abstract Solid-state transformations from invariant reactions are of three types: eutectoid, peritectoid, and monotectoid transformations. This article focuses on structures from eutectoid transformations with an emphasis on the classic iron-carbon system of steel. It illustrates the morphology...
Image
Published: 01 December 2004
surrounded peritectically by CoSn 2 layers (gray), followed by a peritectoid envelope of the CoSn 3 phase that was not included in the phase diagram in Ref 18 , but only found during a study of the peritectic transformation of CoSn ( Ref 35 ). The temperatures of peritectic formation of CoSn and CoSn 2 More
Image
Published: 01 December 2008
Fig. 17 Microstructure of a Sn-17Co alloy that was cooled to 1000 °C (1830 °F) and held 2 h, then cooled to 225 °C (435 °F) and held 22 h. The primary γ-phase has completely transformed and dissolved into relatively small CoSn crystals that form the dark centers surrounded peritectically More
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
... system exhibits a peritectic cascade. In this case, it is possible to get layers of each phase around the initial pro-peritectic phase, as shown in Fig. 15 The cascade in the phase diagram for this alloy includes a peritectic and a peritectoid transformation. As shown in a detailed study...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005214
EISBN: 978-1-62708-187-0
... Abstract This article describes the three solidification mechanisms of peritectic structures, namely, peritectic reaction, peritectic transformation, and direct precipitation. It discusses the theoretical analysis, which shows that the rate of the peritectic transformation is influenced...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003149
EISBN: 978-1-62708-199-3
... the various elements and zirconium exhibit a peritectic or a peritectoid reaction at the zirconium-rich end. Beta-Stabilizing Elements Beta-stabilizing elements lower the α-to-β transformation temperature. Typical β stabilizers include iron, chromium, nickel, molybdenum, copper, niobium, tantalum...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006250
EISBN: 978-1-62708-169-6
... growth. The article also describes the various types of solid-state transformations such as isothermal transformation and athermal transformation, resulting from the heat treatment of nonferrous alloys. It provides information on the homogenization of chemical composition within a cast structure...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001084
EISBN: 978-1-62708-162-7
..., refining, and melting. It also discusses the primary and secondary fabrication of zirconium and hafnium and its alloys. The article talks about the metallurgy of zirconium and its alloys with emphasis on allotropic transformation, cold work and recrystallization, anisotropy and preferred orientation...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.9781627081771
EISBN: 978-1-62708-177-1
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001415
EISBN: 978-1-62708-173-3
...)</xref> Titanium undergoes an allotropic phase transformation at about 885 °C (1625 °F), changing from a close-packed hexagonal crystal structure (alpha phase) to a body-centered cubic crystal structure (beta phase). The transformation temperature (beta transus, or the completion of transformation to beta...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003800
EISBN: 978-1-62708-177-1
... abrasion aging. site). A supersaturated, nonequilibrium ortho- debris from the abrasion track. aging. A change in properties that occurs at am- rhombic phase formed by a diffusionless bient or moderately elevated temperatures af- transformation of the b phase in certain alloys. abrasion process...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003765
EISBN: 978-1-62708-177-1
... by remelting pig iron, scrap, and other additions. For differentiation from steel and cast steel, cast iron is defined as a cast alloy with a carbon content (min 2.03%) that ensures the solidification of the final phase with a eutectic transformation. Depending on chemical specifications, cast irons can...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003085
EISBN: 978-1-62708-199-3
... liquid and solid) Peritectoid (involves solid only) Fig. 7 Hypothetical binary phase diagram showing intermediate phases formed by various invariant reactions and a polymorphic transformation Fig. 8 Hypothetical binary phase diagram showing three intermetallic line compounds...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003059
EISBN: 978-1-62708-200-6
... transformation; peritectoid melting to a liquid and solid phase of separate compositions (TiO solid solution) is also a common occurrence. Again, the temperatures at which these reactions occur vary more as the stoichiometry range of the particular compound widens. Some compounds may sublime to an equilibrium...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001102
EISBN: 978-1-62708-162-7
... reported to promote ⟨111⟩ slip vectors in NiAl; however, no improvement in ductility was observed ( Ref 115 , 116 ). On the other hand, limited tensile ductility was obtained in NiAl alloyed with cobalt ( Ref 117 ), which promotes additional deformation modes through possibly martensitic transformation...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005772
EISBN: 978-1-62708-165-8
... process, and critical dimensional tolerances can distort due to high-temperature creep, relieving of stresses, and phase transformations of the substrate material that can occur at these processing temperatures. Postmachining or grinding after boriding is very difficult to perform due to the extreme high...