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proeutectoid cementite

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Published: 01 December 2004
Fig. 4 Three-dimensional reconstruction of proeutectoid cementite precipitates in an isothermally transformed Fe-13Mn-1.3C alloy. Arrow indicates precipitate selected from grain for imaging in Fig. 5 Source: Ref 3 More
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Published: 01 November 2010
Fig. 5 Three-dimensional reconstruction of proeutectoid cementite precipitates in an isothermally transformed Fe-13Mn-1.3%C alloy. Source: Ref 13 More
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Published: 01 December 2004
Fig. 27 Isothermal transformation (IT) diagram for a hypereutectoid carbon steel with a composition of 1.2 wt% C (1.18C-0.19Si-0.25Mn, wt%). Proeutectoid cementite (c) forms first, starting below A 1 . This transformation region (γ + c) for proeutectoid cementite ceases near the nose More
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Published: 01 August 2013
Fig. 19 Formation of (a) proeutectoid ferrite in hypoeutectoid steel and (b) proeutectoid cementite in hypereutectoid steel More
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Published: 01 December 2004
Fig. 10 Microstructure of 1.2% C-Fe alloy showing cementite outlining the prior-austenite grain boundaries and cementite needles in the grains of pearlite. The grain-boundary cementite is called proeutectoid cementite. This microstructure represents a hypereutectoid steel. 4% picral etch More
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Published: 01 August 2013
Fig. 21 Microstructure of 1.2%C-Fe alloy showing cementite outlining the prior-austenite grain boundaries and cementite needles in the grains of pearlite. The grain-boundary cementite is called proeutectoid cementite. This microstructure represents a hypereutectoid steel. 4% picral etch More
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Published: 01 December 2004
Fig. 26 Microstructure of as-rolled Fe-1.31%C-0.35%Mn-0.25%Si high-carbon water-hardenable tool steel. (a) Etching with picral revealed the Widmanstätten intragranular cementite that precipitated as proeutectoid cementite before the eutectoid reaction, but the intergranular cementite More
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Published: 01 December 2004
Fig. 47 Cementite in an as-hot-rolled Fe-1%C binary alloy revealed by tint etching with Beraha's sodium molybdate tint etch. The arrow points to proeutectoid cementite that precipitated in a prior-austenite grain boundary. The etch also colored the cementite in the pearlite. The specimen More
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Published: 01 December 2004
Fig. 3 Typical optical micrograph of an isothermally transformed Fe-13Mn-1.3C alloy showing proeutectoid cementite precipitates. Source: Ref 3 More
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Published: 01 November 2010
Fig. 4 Typical optical micrograph of an isothermally transformed Fe-13Mn-1.3%C alloy showing proeutectoid cementite precipitates. Source: Ref 13 More
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Published: 27 April 2016
Fig. 10 (a) Pearlite nucleation. (b) Colony growth. (c) Deep-etched steel sample showing pearlite colony growth from a proeutectoid cementite plate. Source: Ref 8 as published in Ref 1 More
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Published: 01 December 2004
Fig. 6 (a) Pearlite nucleation. (b) Colony growth. (c) Deep-etched steel sample showing pearlite colony growth off of proeutectoid cementite plate. Source: (a) and (b) from Ref 4 , p 331, (c) from Ref 6 More
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001008
EISBN: 978-1-62708-161-0
... and the phase transformations that change the structure and properties at varying levels of carbon content. Microstructures described include pearlite, bainite, proeutectoid ferrite and cementite, ferrite-pearlite, and martensite. The article depicts some of the primary processing steps that result in ferrite...
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
... Fig. 10 (a) Pearlite nucleation. (b) Colony growth. (c) Deep-etched steel sample showing pearlite colony growth from a proeutectoid cementite plate. Source: Ref 8 as published in Ref 1 Fig. 11 Growth of intergranular pearlite nodules (numbered light regions) into the austenite matrix...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005819
EISBN: 978-1-62708-165-8
... steels, the ferrite that forms before the eutectoid reaction is termed proeutectoid ferrite ( Fig. 19a ), while the cementite that forms before the eutectoid reaction in hypereutectoid steels is termed proeutectoid cementite ( Fig. 19b ). Fig. 19 Formation of (a) proeutectoid ferrite...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003763
EISBN: 978-1-62708-177-1
... austenite transforms to pearlite once the A 1 temperature at 727 °C (1341 °F) is crossed. The ferrite that forms is called proeutectoid ferrite because it forms before the eutectoid reaction (“pro” meaning before). On the other side of the diagram, cementite will form as proeutectoid cementite. All steels...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003760
EISBN: 978-1-62708-177-1
... of studies inspired by 3D observations. For example, subsequent to a 3D analysis of proeutectoid cementite ( Ref 3 ), Mangan et al. ( Ref 4 ) determined that the two different morphologies of Widmanstätten cementite precipitates, which were revealed by 3D analysis, correspond to the two known orientation...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003723
EISBN: 978-1-62708-177-1
...) exceeds its solubility limit in a base metal (or so-called solvent). For example, cementite (Fe 3 C) is a second-phase constituent in carbon steel. Second-phase constituents form because, at some point, the lattice of the host metal cannot accommodate any more atoms of the alloying element. When an alloy...
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Published: 01 December 2004
Fig. 22 Temperature-composition regions indicating the morphological tendencies of proeutectoid ferrite and cementite from isothermal decomposition of large-grain (ASTM 0 to 1) and small-grain (ASTM 7 to 8) austenite. See also Fig. 23 for descriptions of GBA, grain-boundary allotriomorphs; W More
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003246
EISBN: 978-1-62708-199-3
.... This excess cementite is referred to as “proeutectoid cementite.” A grain-boundary cementite network renders such steels quite brittle. The strength and hardness of ferrite-pearlite steels increase with increasing pearlite content and are further increased by reductions in the interlamellar spacing. Pure...