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tempered-martensite embrittlement

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Published: 01 November 2013
Fig. 20 Tempered martensite embrittlement. Source: Ref 10 More
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Published: 01 June 2008
Fig. 11.27 Tempered martensite embrittlement. Source: Ref 10 More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140099
EISBN: 978-1-62708-264-8
... is an impact test similar to the Charpy test, and Fig. 10.4 presents a summary of scatter bands of data from impact tests on steels with two different levels of %C. These curves illustrate the following two important characteristics of heat treated steels: tempered martensite embrittlement and the effect...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410439
EISBN: 978-1-62708-265-5
... shortness associated with copper and overheating and burning as occur during forging. It addresses various types of embrittlement, including quench embrittlement, tempered-martensite embrittlement, liquid-metal-induced embrittlement, and hydrogen embrittlement, and concludes with a discussion on high...
Image
Published: 01 December 1996
Fig. 5-50 Schematic illustration of the heat treatments involved in tempered martensite embrittlement (TME) [or one-step temper embrittlement (OSTE)]. (From C.L. Briant and S.K. Banerji, Int. Metals Reviews , Vol 23, p 164 (1978), Ref 24 ) More
Image
Published: 01 November 2007
Fig. 10.4 Dependence of notched impact energy on tempering temperature for 0.4 and 0.5% C steels. TME, tempered martensite embrittlement. Source: Ref 10.2 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130285
EISBN: 978-1-62708-284-6
... steel in those applications where it is necessary to use tempering temperatures that cause embrittlement of tempered martensite, which is soon defined. This reaction begins to occur at temperatures on the order of 100 °C. Cementite can also be observed during quenching when the M s temperature...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1996
DOI: 10.31399/asm.tb.phtpclas.t64560127
EISBN: 978-1-62708-353-9
... as epsilon (hexagonal, Fe 2.4 C) 200 to 350 Transformation of retained austenite to ferrite and cementite (T2) Associated with tempered martensite embrittlement in low and medium carbon steels 250 to 700 Formation of ferrite and cementite; eventual development of well spheroidized carbides...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410405
EISBN: 978-1-62708-265-5
... produce low-toughness and brittle fractures that limit the application of hardened steels. Because of embrittlement phenomena, steels with martensitic and tempered martensitic microstructures are sometimes considered to be generally brittle. This characterization is true only for certain steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240177
EISBN: 978-1-62708-251-8
..., “Tempered Martensite Embrittlement,” in this chapter. Fig. 11.20 Effect of carbon content on tempering of plain carbon steels. Source: Ref 5 Fig. 11.21 Effects of tempering temperature on 4340 steel. Source: Ref 5 Fig. 11.22 Effects of tempering temperature on impact...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900125
EISBN: 978-1-62708-358-4
... as shown. Source: Ref 19 The decrease in toughness of hardened steels tempered in the range of 250 to 350 °C (480 to 660 °F) has been referred to as tempered martensite embrittlement ( Ref 22 ). In medium-carbon steels, tempered martensite embrittlement may take several forms, ranging from...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410373
EISBN: 978-1-62708-265-5
... as the supersaturation of as-quenched martensite is relieved and equilibrium mixtures of phases are approached with increased tempering intensity. Embrittlement phenomena that develop on tempering and additional characterization of quenched and tempered steel mechanical behavior are presented in later chapters...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900141
EISBN: 978-1-62708-358-4
... between 150 and 200 °C (300 and 390 °F), but then show a marked decrease in toughness when tempered at temperatures above this range. This decrease in toughness, formerly referred to as 260 °C (500 °F) embrittlement, is now termed tempered martensite embrittlement. The major cause for the drop...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130043
EISBN: 978-1-62708-284-6
..., because there was an incomplete transformation to austenite and therefore an incomplete transformation to martensite. Poor mechanical properties, such as low tensile and yield stress, and poor impact properties may occur. There are also several embrittlement mechanisms caused by the use of improper...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900165
EISBN: 978-1-62708-358-4
... of the silicon-containing S-type steels may be related to the retardation of the second stage of tempering. In particular, prevention of the decomposition of retained austenite would prevent the formation of coarse cementite particles associated with tempered martensite embrittlement and reduced fracture...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310163
EISBN: 978-1-62708-326-3
..., the chapter describes the equipment used for and principal variables of tempering. It discusses the causes for various forms of embrittlement due to tempering. Information on multiple tempering, protective-atmosphere tempering, and selective tempering are also provided, along with processes involved...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310029
EISBN: 978-1-62708-326-3
... phase transformation, hysteresis in heating and cooling, ferrite and austenite as two crystal structures of solid iron, and the diffusion coefficient of carbon. austenite bainite carbon cementite diffusion coefficient ferrite heat treatment iron martensite microstructure pearlite phase...
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
... raises the ductile-to-brittle transition temperature and can reduce the energy absorbed during fracture at and above room temperature. There are two types of embrittlement. One is called tempered martensite embrittlement. It is also referred to as 500 °F embrittlement and one-step embrittlement...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630081
EISBN: 978-1-62708-270-9
... treatment Toughness decreases Temper embrittlement Carbon and low-alloy steel 375–575 °C (700–1070 °F) exposure Increase in DBTT Tempered martensite embrittlement Heat-treated alloy steel 200–370 °C (400–700°F) exposure Toughness decreases 400–500 °C embrittlement Stainless steel (>15...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.9781627083263
EISBN: 978-1-62708-326-3