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austenitic ductile iron

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Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006325
EISBN: 978-1-62708-179-5
... chemical compositions and some mechanical properties of austenitic ductile cast irons. The article concludes with a discussion on heat treatment of austempered ductile iron. austempered ductile iron austenitic ductile cast iron ductile cast iron graphite nodules heat treatment low-alloy ductile...
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
..., including austenitic gray irons and austenitic ductile irons. It also provides a discussion on the heat treatment of high-silicon irons for heat resisting and corrosion resisting applications. austenitic ductile iron austenitic gray iron corrosion resistance heat treatment high-alloy graphitic...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005328
EISBN: 978-1-62708-187-0
... Abstract This article discusses the melting and poring practices, heat treatment, and applications of different types of high-alloy graphitic iron, namely, high-silicon gray irons, high-silicon ductile irons, nickel-alloyed austenitic irons, austenitic gray irons, austenitic ductile irons, and...
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005937
EISBN: 978-1-62708-168-9
... treatments of ductile irons, namely, stress relieving, austenitizing, annealing, normalizing, quenching, martempering, austempering, and surface hardening. The article elucidates the effects of these heat treatments on the mechanical properties of the ductile irons. alloying annealing austempering...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001003
EISBN: 978-1-62708-161-0
... cast ferrous metal. The allowances in patternmaker rules (shrink rules) are usually: Type of cast metal Shrinkage allowance, % Ductile iron 0–0.7 Gray iron 1.0 Malleable iron 1.0 Austenitic alloy iron 1.3–1.5 White iron 2.0 Carbon steel 2.0 Alloy steel 2.5...
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
...., ferritic ductile iron and austenitic ductile iron), have opened new horizons for cast iron to replace steel castings and forgings in many engineering applications with considerable cost benefits. Thanks to the extensive research efforts made over the past few years, new processing techniques have opened...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006322
EISBN: 978-1-62708-179-5
... finish Fig. 2 Isothermal transformation diagram of a processing sequence for austempering, with the M s and M f decreasing as the γ is enriched with carbon during stage I Fig. 3 Optical micrographs of ductile iron. (a) Ferritic matrix produced by intercritically austenitizing at 732...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006339
EISBN: 978-1-62708-179-5
... resistance to hardness. As the bulk hardness of ADI is reduced by the austempering temperature, the amount of stabilized austenite increases. This increase in austenite content increases the hardness increment produced by surface deformation. As a result, a ductile iron component austempered to produce a...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006326
EISBN: 978-1-62708-179-5
... used ductile cast iron grades have chemical compositions that are very close to the eutectic point. These alloys are endogenous, meaning that they solidify as a fine-grained mush of graphite nodules encapsulated in austenite ( Ref 18 ). Shrinkage during solidification is negligible because the...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003108
EISBN: 978-1-62708-199-3
... bainitic ferritic plates (dark) and interplate austenite (white) Fig. 1 Spheroidal graphite in an unetched ductile iron matrix shown at 75× (a) and in the etched (picral) condition shown at 300× (b). Etching reveals that the matrix consists of ferritic envelopes around the graphite nodules...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006310
EISBN: 978-1-62708-179-5
... Abstract Unlike gray iron, which contains graphite flakes, ductile iron has an as-cast structure containing graphite particles in the form of small, rounded, spheroidal nodules in a ductile metallic matrix. This article discusses the raw materials that are used for ductile iron production and...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005324
EISBN: 978-1-62708-187-0
... properties of annealed ductile iron containing 2.95% Si. Source: Ref 33 Austempered ductile iron exhibits a good combination of low transition temperature and high impact energy that can be obtained in irons containing retained austenite ( Ref 34 ). Many figures have been reported for the stress...
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
... ductile iron containing 2.95% Si. Source: Ref 35 Austempered ductile iron exhibits a good combination of low transition temperature and high impact energy that can be obtained in irons containing retained austenite ( Ref 36 ). Many figures have been reported for the stress-intensity factor, K...
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
... specimens, a compacted iron, and a ductile iron with nodular graphite Fig. 23 Microstructure of austempered ductile iron (Fe-3.6%C-2.5%Si-0.7%Cu) austenitized at 900 °C (1650 °F) for 2 h and transformed (a) at 280 °C (535 °F) for 2 h (525 HV/54.8 HRC) and (b) at 380 °C (715 °F) for 2 h (310 HV...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000603
EISBN: 978-1-62708-181-8
... austenite (light). Microcracks, initiate and propagate in the low-strength ferrite, avoiding regions of strong and tough austenite. SEM, 2500× (R.C. Voigt and L.M. Eldoky, University of Kansas) Microcrack initiation and growth in an annealed ferritic ductile iron (3.6% C, 2.2% Si, 0.3% Mn, 0.7% Ni, 0.2...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... Cottrell's model using MgO ( Ref 17 ) and in iron ( Ref 18 ). As Ref 4 indicates, the work reported in Ref 13 supports such a model of dislocation interaction to create a cleavage nucleus. Specimens tested at 77 K could be made to flow plastically or to fail in a brittle manner, depending on specimen...