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proeutectoid structure

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560125
EISBN: 978-1-62708-291-4
... it intermingles with proeutectoid ferrite and cementite. It explains how ferrite and pearlite respond to deformation and how related features such as slip lines, dislocations, shear bands, and kinking can be detected as well as what they reveal. It also describes the structure of patented wires, cast steels...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560165
EISBN: 978-1-62708-291-4
... below). It is apparent from the discussion of Fig. 7.4 that this spheroidized structure is difficult to restore if it is lost by austenitizing above the A 3 temperature followed by slow cooling, particularly if any of the proeutectoid cementite then precipitates with a Widmanstätten morphology...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410039
EISBN: 978-1-62708-265-5
..., and various types of transformations. alloying elements cementite eutectoid transformation ferrite microstructure pearlite proeutectoid structure CHAPTER 3, “PHASES AND STRUCTURES,” DESCRIBES the crystal structures of the phases that form in steels and the Fe-C phase diagram, which defines...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560221
EISBN: 978-1-62708-291-4
... (Part 1) Proeutectoid ferrite and pearlite formation in isothermal transformation of 0.55% C hypoeutectoid steels. 0.55C-0.08Si-0.60Mn (wt%). (a) Austenitized at 860 °C, transformed at 705 °C for 20 s. Picral. 500×. (b) Austenitized at 860 °C, transformed at 705 °C for 2 min. Picral. 500×. (c...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420143
EISBN: 978-1-62708-310-2
..., hypoeutectoid, and hypereutectoid structures and how they are affected by the addition of various alloying elements. The chapter also discusses the formation of peritectoid structures in the uranium-silicon alloy system. eutectoid structures eutectoid transformation hypereutectoid structures...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410197
EISBN: 978-1-62708-265-5
... treating eutectoid, hypoeutectoid, and proeutectoid steels. It also provides references to large collections of transformation diagrams and includes several diagrams that plot quenching and hardening transformations as a function of bar diameter. continuous cooling transformation diagram isothermal...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310029
EISBN: 978-1-62708-326-3
... (1650 °F); ASTM grain size No. 6. Source: Ref 15 Fig. 20 Formation of (a) proeutectoid ferrite in hypoeutectoid steel and (b) proeutectoid cementite in hypereutectoid steel Fig. 21 Microstructure of typical ferrite-pearlite structural steels at two different carbon contents...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560029
EISBN: 978-1-62708-291-4
...Abstract Abstract This chapter describes some of the most essential tools in metallurgy and what they reveal about the structure, composition, and processing requirements of steel. It begins by identifying important details in the constitutional diagram of iron-cementite. It then explains how...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410113
EISBN: 978-1-62708-265-5
... DESCRIBES ferritic microstructures that form during continuous cooling of carbon steels. Ferritic microstructures identified as proeutectoid ferrite have already been discussed in Chapter 4, “Pearlite, Ferrite, and Cementite,” in this book. These forms of ferrite nucleate as equiaxed grains on austenite...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560185
EISBN: 978-1-62708-291-4
.... and Savage W.F. , Weld. J. , 1967 , 46 ( 9 ), 422-s . 10.1002/j.2164-4918.1967.tb03208.x Original Structure: Ferrite and Spheroidized Cementite Original Structure: Lamellar Pearlite Original Structure: Martensite Original Structure: Proeutectoid Ferrite and Pearlite Original...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560361
EISBN: 978-1-62708-291-4
... for 4 h. (a) 1% nital. 75×. (b) to (e) 1% nital. 1000×. (e) Structure of the unaffected core. Fig. 12.12 Decarburization in hypoeutectoid steels. (a) 0.6% C hot-rolled bar. 0.55C-0.08Si-0.60Mn (wt%). Normalized. Picral. 250×. (b) 0.2% C hot-rolled plate. 0.24C-0.02Si-0.80Mn (wt...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240153
EISBN: 978-1-62708-251-8
..., it is appropriate to discuss the iron-carbon system in some detail. Most carbon steels contain up to 1.5% C, while cast irons normally contain 2 to 4% C. As discussed in Chapter 1, “Metallic Structure,” iron is allotropic and changes its crystalline structure on heating or cooling. When pure iron solidifies...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.9781627083263
EISBN: 978-1-62708-326-3
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560309
EISBN: 978-1-62708-291-4
.... 11.5 (Part 2) d ). The latter regions are the pearlitic bands in the parent structure that have been austenitized and transformed to a finer mixture of proeutectoid ferrite and pearlite during subsequent cooling. The origin of this type of structure can be interpreted in terms of the isothermal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400023
EISBN: 978-1-62708-258-7
... consists of in steel. Examples of microstructures are given in Fig. 2.1 . The term “microstructure” relates to the overall structure, as usually observed in a microscope, which generally consists of one or more discrete phases. These phases are the building blocks of the various constituents that make up...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410099
EISBN: 978-1-62708-265-5
... T. , and Jaffee R.I. , Effects of Mn, Si, and Purity on the Design of 3.5NiCrMoV, 1CrMoV, and 2.25Cr-1Mo Bainitic Alloy Steels , Metall. Trans. A , Vol 20A , 1989 , p 1445 – 1460 10.1007/BF02665502 6.10 Pickering F.B. , The Structure and Properties of Bainite in Steels...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310055
EISBN: 978-1-62708-326-3
... that the final structure would contain 40% ferrite and 60% pearlite. The larger amounts of pearlite, which were actually measured, are examples of suppression of the proeutectoid reaction with increasing cooling rates. The most useful way of accurately describing the complex mechanism of quenching...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560005
EISBN: 978-1-62708-291-4
...Abstract Abstract This chapter discusses the development of the nomenclature used to describe the constitution and structure of metals and alloys, particularly the phases observed in the microstructure of steel. It also points out some of the problems with current nomenclature and provides...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140021
EISBN: 978-1-62708-264-8
... the various phases. The chapter concludes with a brief review of spheroidized microstructures. electron microscopes grain structure heat treatment microstructure optical microscopes steel THE OPTICAL MICROSCOPE is the principal tool used to characterize the internal grain structure of steels...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410133
EISBN: 978-1-62708-265-5
... to the cost-effective manufacture of steel structures, especially when heavy, as-cast sections must be converted to smaller sections and shapes. Austenite is the parent phase of all the microstructures described to this point: pearlite, proeutectoid phases, martensite, bainite, and various ferritic...