1-20 of 237 Search Results for

nodularity structure

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
Image
Published: 01 January 2002
Fig. 18 Failure of a ductile iron cone-crusher frame ( example 7 ). (a) Near-surface microstructure of the frame showing degenerate graphite morphology rather than the intended nodular structure evident in the core. Unetched. 30×. (b) The typical frame microstructure also exhibits high levels More
Image
Published: 15 January 2021
Fig. 14 Failure of a ductile iron cone-crusher frame (Example 7). (a) Near-surface microstructure of the frame showing degenerate graphite morphology rather than the intended nodular structure evident in the core. Unetched. Original magnification: 30×. (b) The typical frame microstructure also More
Image
Published: 01 December 2008
Fig. 2 Micrograph of a 4Si-Mo ductile iron showing nodular graphite structure. Original magnifi-cation: 400× More
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006346
EISBN: 978-1-62708-179-5
... Abstract The main factors affecting the mechanical properties of compacted graphite irons both at room temperatures and at elevated temperatures are composition, structure (nodularity and matrix), and section size. This article presents a comparison between some properties of flake graphite (FG...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006312
EISBN: 978-1-62708-179-5
... properties of CGI with ferritic and pearlitic matrix structures are summarized in Table 1 . The data are representative of CGI with 10% nodularity, as obtained from separately cast Y-blocks, keel blocks, or insulated test bars, as specified by ISO 16112 ( Ref 13 ), the international standard for CGI...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006345
EISBN: 978-1-62708-179-5
... Abstract Ductile iron, also known as nodular iron or spheroidal graphite iron, is second to gray iron in the amount of casting produced. This article discusses the common grades of ductile iron that differ primarily by the matrix structure that contains the spherical graphite. The grades...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001004
EISBN: 978-1-62708-161-0
... properties of CG irons both at room temperatures and at elevated temperatures are composition, structure (nodularity and matrix), and section size. The article also discusses the applications of CG irons that stem from their relative intermediate position between FG and SG irons. The tables in the article...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006317
EISBN: 978-1-62708-179-5
... rating scale. For this purpose, some studies have introduced a negative nodularity range, spanning from 0 to −5% nodularity. A value of −1% nodularity corresponds to a compacted graphite microstructure with approximately 20% of the structure being occupied by flake graphite, while −5% represents a fully...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006328
EISBN: 978-1-62708-179-5
... of gray or ductile iron) to a one-tonne ladle can change the nodularity from <5% to >30% in a 25 mm diameter test bar. In a complex casting such as a cylinder block or head, the higher nodularity structure will almost certainly lead to porosity defects. Fig. 9 An addition of 0.08% inoculant...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005325
EISBN: 978-1-62708-187-0
... between that of FG (lowest) and SG (highest) irons, this is not true. Figure 7 shows the influence of nodularity on the structure of chill pins cast in air set molds ( Ref 15 ). It can be seen that the highest chilling tendency is achieved for irons with nodularities between 6 and 64%. In other words...
Image
Published: 31 August 2017
Fig. 26 Ductile iron and compacted graphite iron produced from the same base iron, 9t coreless induction furnace melting. (a) Graphite nodularity and (b) residual magnesium content at different taps; (c) nodularity-final magnesium content relationship; (d) typical compacted graphite iron More
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005970
EISBN: 978-1-62708-168-9
... 205 30 7 148–211 D-3 380 55 205 30 6 139–202 D-4 415 60 … … … 202–273 D-5 380 55 205 30 20 131–185 (a) In 50 mm (2 in.) Fig. 1 Photomicrograph of a D5S Ni-Resist ductile iron casting showing nodular graphite structure. 400× Applications...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006350
EISBN: 978-1-62708-179-5
... for preparing ductile cast iron specimens with a wide range of phases and constituents as well as variations in graphite morphologies. A wide variety of matrix microstructures can be obtained in ductile irons. Examples are presented using a variety of etchants. Control of the nodularity of graphite in ductile...
Image
Published: 01 December 1998
Fig. 4 Microstructure of malleable irons. All contain nodular graphite or temper carbon. Nital etch; 500×. (a) Ferritic malleable ASTM 32510, ferritic structure. (b) Pearlitic malleable ASTM 48004, spheroidized structure. (c) Pearlitic malleable ASTM 8002, spheroidized structure More
Image
Published: 01 October 2014
Fig. 1 Photomicrograph of a D5S Ni-Resist ductile iron casting showing nodular graphite structure. 400× More
Image
Published: 01 October 2014
Fig. 2 Photomicrograph of subcritically annealed 4% Si-Mo ductile iron casting showing nodular graphite structure. 400× More
Image
Published: 31 August 2017
Fig. 7 Micrograph of a subcritically annealed 4Si-Mo ductile iron showing nodular graphite structure. Original magnification: 400× More
Image
Published: 01 December 2008
Fig. 3 Micrograph of a D-5S Ni-Resist ductile iron showing nodular graphite structure. Original magnification: 400× More
Image
Published: 09 June 2014
Fig. 4 Polished structures of cast iron with (a) lamellar graphite, (b) vermicular graphite, and (c) nodular graphite. Source: Ref 3 More
Book Chapter

Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006338
EISBN: 978-1-62708-179-5
..., and the result is shrinkage between the eutectic cells. In many foundries, the microstructure shows even-sized nodules (accounting for the fact that the section cuts through nodules in two dimensions). Many still consider this to be a good structure, even though the iron is prone to shrinkage. Nodularizers...