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iron-nitrogen phase diagram

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140189
EISBN: 978-1-62708-264-8
...) and 17.2 (p 376). Fig. 17.12 Jominy data comparing a carbonitrided and a carburized 1020 steel. Source: Ref 17.1 , p 58 Nitrocarburizing (Ferritic Nitrocarburizing) The iron-nitrogen phase diagram is shown in Fig. 17.13 . By comparing this to the iron-carbon diagram of Fig. 4.4...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410551
EISBN: 978-1-62708-265-5
..., surface layers of face-centered cubic γ′ Fe 4 N or close-packed hexagonal ε Fe 2 N 1− x may form, as shown in the iron-nitrogen phase diagram (Fig. 21.40) in Chapter 21, “Surface Hardening” ( Ref 22.13 ). In view of the diffusion-controlled increase in nitrogen content of a steel surface produced...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310001
EISBN: 978-1-62708-286-0
... molybdenum. Its composition is sometimes given as (CrMo) 35 (FeNi) 65 , but examination of the iron-chromium phase diagram shows that it is archetypically an equiatomic iron chromium compound. It is strongly promoted by silicon and suppressed by nitrogen. Stabilized alloy grades show more rapid sigma...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410499
EISBN: 978-1-62708-265-5
... Nitriding , Heat Treating , Vol 4 , ASM Handbook , ASM International , 1991 , p 387 – 409 21.71 Jack K.H. , The Occurrence and the Crystal Structure of α″-Iron Nitride; A New Type of Interstitial Alloy Formed during the Tempering of Nitrogen-Martensite , Proc. R. Soc. , Vol A208 , 1951...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000005
EISBN: 978-1-62708-312-6
... of chromium and nickel on compressibility of chrome-nickel steels. Source: Ref 19 . Reprinted with permission from MPIF, Metal Powder Industries Federation, Princeton, NJ Fig. 2.5 Effects of (a) carbon and (b) nitrogen addition on the (α + γ)/α boundary of the iron-chromium phasediagram. Source...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410579
EISBN: 978-1-62708-265-5
... to understand the phase relationships and microstructures in stainless steels is the iron-chromium (Fe-Cr) equilibrium phase diagram. Figure 23.1 shows the iron-chromium equilibrium phase diagram. As in the iron-carbon system, the allotropic forms of iron constitute the iron end of the diagram. Chromium...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060197
EISBN: 978-1-62708-261-7
... of steels. Fig. 9.1 Equilibrium phase diagram of the iron-cementite (Fe 3 C) system. See Fig. 2.33 for details of the A-B-C Region. Carbon is almost insoluble in ferrite, because the interstitial positions available in the bcc lattice are not large enough to accommodate it. However, carbon...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480051
EISBN: 978-1-62708-318-8
... … … Alpha stabilizer Nitrogen 0.1 483 70 … … Oxygen 0.1 365 53 … … Carbon 0.1 324 47 … … Aluminum 4 496 72 … … Neutral stabilizer Zirconium 4 331 48 … … Tin 4 310 45 … … Beta stabilizer Iron 4 593 86 703 102 Chromium 4 510 74 655 95...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420015
EISBN: 978-1-62708-310-2
..., these interstitial solid solutions have somewhat limited composition ranges. Only the transition metals (e.g., iron, nickel, titanium, and zirconium) have appreciable solubilities for carbon, nitrogen, and boron. Very small atoms, such as carbon, nitrogen, and hydrogen can fit in the spaces between the larger atoms...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740271
EISBN: 978-1-62708-308-9
..., no white layer, high equipment costs, close case control Source: Ref 1 Nitriding is conducted in atmospheres that decompose ammonia to provide nitrogen to the surface. The nitrogen diffuses into the steel and also combines with the iron at the surface to form iron nitride. The reaction...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310001
EISBN: 978-1-62708-326-3
..., the four interstitial atoms (boron, carbon, hydrogen, and nitrogen) tend to have very limited solubility. For example, carbon has a very low solid-solubility limit in iron with a bcc phase structure—called ferrite or alpha (α) iron . The maximum solubility limit of carbon in bcc iron (ferrite) is only...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430027
EISBN: 978-1-62708-253-2
... showing that (a) carbon atoms occupy face center positions in bcc lattice of α-iron and (b) occupy edge center positions in fcc lattice of γ-iron Fig. 3.8 Iron-carbon phase diagram. Source: Ref 3.3 Fig. 3.9 Steel portion of the iron-carbon diagram Fig. 3.10 Microstructures...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310091
EISBN: 978-1-62708-286-0
... in ( precipitation in lean duplex 2003 Fig. 1 Wrought 2205 duplex microstructure Fig. 2 The Fe-Cr-Ni phase diagrams. The shaded area results from nitrogen additions Fig. 3 The iron-nickel diagram for 22% Cr, 3% Mo, 0.15% N Fig. 4 The iron-nickel diagram for 25% Cr, 4% Mo...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400023
EISBN: 978-1-62708-258-7
... atoms have a much smaller atomic diameter than iron and can fit into some of these sites. Thus, carbon is called an interstitial element (another important interstitial element is nitrogen). When an element occupies sites in the iron lattice, the result is called a solid solution. With interstitial...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310109
EISBN: 978-1-62708-286-0
... at 0.20% carbon Fig. 7 Influence of substitutional elements on hardness of iron alloys Fig. 8 Influence of interstitial carbon and nitrogen on toughness transition temperature Source: Ref 8 Fig. 11 Charpy V-notch impact ductile to brittle transition temperature (DBTT...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240433
EISBN: 978-1-62708-251-8
... of the superaustenitic 6% Mo grades. The ability to closely control nitrogen as an alloying addition has also tremendously improved the weldability of duplex stainless steels. Ferritic stainless steels (4 xx series) are essentially iron-chromium alloys with body-centered cubic (bcc) crystalline structures. Ferritic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.9781627083126
EISBN: 978-1-62708-312-6
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310069
EISBN: 978-1-62708-286-0
... (4845) versus rare earth-modified 253MA in cyclic oxidation. Source: Ref 21 Fig. 25 Isocorrosion in pure sulfuric acid. Source: Ref 28 Fig. 26 Resistance to hydrochloric acid. Source: Ref 28 Fig. 3 (a) Iron-chromium phase diagram at 8% nickel; (b) iron-nickel phase...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310201
EISBN: 978-1-62708-286-0
... to complete a satisfactory weld before precipitation occurs. Thus, accurate knowledge of material history is vital. Likewise, variations within specification of nitrogen content influence the time it takes intermetallic phases to form. Once a welding procedure is qualified for an alloy with given nitrogen...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120013
EISBN: 978-1-62708-269-3
.... Yield strengths of commercially pure grades may vary from about 170 MPa (25 ksi) to about 480 MPa (70 ksi) simply as a result of variations in the interstitial and impurity levels, with strength increasing as the oxygen/nitrogen (and iron) contents increase ( Table 2.2 ). Alpha alloys are alloys...