1-20 of 122 Search Results for

austenite-spheroidal graphite eutectic system

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006304
EISBN: 978-1-62708-179-5
... with a discussion on the nucleation and growth of austenite dendrites. It describes the nucleation of lamellar graphite, spheroidal graphite, and austenite-iron carbide eutectic. The article reviews three main graphite morphologies crystallizing from the iron melts during solidification: lamellar (LG), compacted...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005213
EISBN: 978-1-62708-187-0
.... cast iron directional solidification multidirectional solidification nucleation solidification liquid iron-carbon alloys austenite-flake graphite eutectic system austenite-spheroidal graphite eutectic system austenite-iron carbide eutectic system hypereutectic cast iron isothermal...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003106
EISBN: 978-1-62708-199-3
... Austempered ductile iron Spheroidal graphite At Silver-gray Heat treatment (a) F, ferrite; P, pearlite; A, austenite; M, martensite; At, austempered (bainite). (b) White irons are not usually heat treated, except for stress relief and to continue austenite transformation. White cast...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006334
EISBN: 978-1-62708-179-5
... solubility level in austenite (∼0.08%), phosphorus forms a very hard ternary eutectic. While manganese is a carbide promoter, it can combine with sulfur. The resultant manganese sulfides act as nuclei for lamellar graphite. In industrial processes, nucleation phenomena may sometimes override solubility...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006314
EISBN: 978-1-62708-179-5
..., each grain contained only one graphite nodule, although experimental evidence suggests that more than one graphite spheroid can be found in the eutectic austenite grains ( Ref 61 , 62 ). An improved model was reported by Ruxanda et al. ( Ref 63 ); it included solidification of primary austenite...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006294
EISBN: 978-1-62708-179-5
... Fe-Fe 3 C or Fe-Gr system, cast iron can be defined as an iron-carbon alloy with more than 2% C. However, because silicon and other alloying elements considerably change the maximum solubility of carbon in austenite (γ) and in the eutectic, a more general definition of cast iron is that it is an iron...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0009206
EISBN: 978-1-62708-161-0
... main purpose is to change the morphology of the eutectic either by changing the graphite shape (e.g., from LG to SG), or to promote Gr-austenite eutectic solidification over the Fe 3 C-austenite eutectic (increase graphitization potential) Typical alloys used for inoculation of cast iron...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006299
EISBN: 978-1-62708-179-5
... Effect of superheat on the eutectic temperature of gray cast iron. Source: Esser and Lautenbusch as quoted in Ref 19 The Gray-to-White Transition The iron-carbon system contains two eutectic reactions, one stable and one metastable. The first one produces graphite and austenite; the other one...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006316
EISBN: 978-1-62708-179-5
... is enriched with carbon. The growing dendrites interact with graphite precipitates. Flake graphite and austenite form units that grow cooperatively, with both phases in contact with the melt ( Ref 6 ). Next, the eutectic cells surround the austenitic dendrites and grow until the liquid phase is consumed...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006300
EISBN: 978-1-62708-179-5
... untransformed volume. The article describes the austenite decomposition to ferrite and pearlite in spheroidal graphite irons and lamellar graphite irons. It provides a discussion on modeling austenite decomposition to ferrite and pearlite. austenite decomposition austenite-to-pearlite transformation...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006327
EISBN: 978-1-62708-179-5
... show that changing the initial temperature of the metal in the mold cavity, for example, from 1250 to 1350 °C (2280 to 2460 °F), reduces the cooling rate by half. Solidification The solidification of ductile iron starts with the nucleation and growth of graphite and austenite for eutectic...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003174
EISBN: 978-1-62708-199-3
... is that when the stable eutectic, graphite, forms on solidification, it expands rather than shrinks. This means that many iron castings can often be made with minimum use of risers. Fig. 1 Iron-carbon diagram, where solid curves represent the metastable system Fe-Fe 3 C and dashed curves represent...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005322
EISBN: 978-1-62708-187-0
... both the solidification and the matrix structures of these alloys. Over a range of appropriate composition and cooling rates, the solidification of molten iron will occur in the form of a eutectic cell consisting of interconnected graphite flakes and austenite. The graphite crystal is hexagonal in form...
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
... of a higher undercooling degree, that is, in the temperatures below T mst , primary solidification and eutectic solidification can both take place completely or partially in the metastable system, with precipitation of primary cementite or ledeburite. Graphitization can also take place in the range...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006295
EISBN: 978-1-62708-179-5
... that the two invariant points of the binary Fe-C system, the peritectic and eutectic points, appear now as monovariant lines running inside the composition domain and meeting at a point labeled E 1 , which is an invariant eutectic involving graphite, austenite, and ferrite. Fig. 12 Projection...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006343
EISBN: 978-1-62708-179-5
... specimens to reveal some of the major microstructural constituents of ferrous materials. Even with primitive microscopes lacking illumination, Sorby observed various microstructural constituents such as graphite, cementite, pearlite, austenite, and phosphide eutectic. Subsequently, the introduction of more...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006311
EISBN: 978-1-62708-179-5
... graphite is f Gr = 0.07. The iron-graphite eutectic can be either cooperative, irregular, as is the case of lamellar graphite cast iron, or divorced, as for spheroidal graphite cast iron. In this last case, at the beginning of solidification the two phases, graphite and austenite dendrites, grow...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006315
EISBN: 978-1-62708-179-5
... on the primary structure (austenite, carbides, eutectic cells, graphite characteristics). Indirectly it influences the eutectoid structure, especially pearlite-ferrite ratio, which is dependent on the graphite amount but especially its morphology. Generally, inoculation is applied to forestall solidification...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003729
EISBN: 978-1-62708-177-1
... a graphite nucleus. The nucleus transforms into a graphite nodule developing an austenite shell that is considered an integral part of the original dendritic grain. The model is able to draw a realistic representation of the grain structure during the solidification of spheroidal graphite iron, as shown...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006330
EISBN: 978-1-62708-179-5
... of the solid sample; 3, the crucible is now entirely filled; 4, melt expansion and shrinkage; 5, formation of primary austenite dendrites; 6, start of the graphite and austenite eutectic precipitation; 7, solid-state transformation. Source: Ref 16 Problems Associated with Volume-Change Measurements...