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Ductile brittle transition

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780204
EISBN: 978-1-62708-281-5
...Abstract Abstract This article discusses various factors influencing general polymeric behavior, ductile-brittle transitions, crazing, and the brittle fracture of polymeric materials. The discussion covers the effects of environment on glassy thermoplastic, several parametric descriptions...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240221
EISBN: 978-1-62708-251-8
... and causes of these failure modes. Some body-centered cubic and hexagonal close-packed metals, and steels in particular, exhibit a ductile-to-brittle transition when loaded under impact and the chapter describes the use of notched bar impact testing to determine the temperature at which a normally ductile...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610055
EISBN: 978-1-62708-303-4
... it appears under various levels of magnification. It also discusses the ductile-to-brittle transition observed in steel, the characteristics of intergranular fracture, and the causes of embrittlement. References References 1. Wulpi D.J. , Ductile Fracture , Understanding How Components Fail...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410213
EISBN: 978-1-62708-265-5
... This chapter discusses the stress-strain response of ferritic microstructures and its influence on tensile deformation, strain hardening, and ductile fracture of carbon steels. It describes the ductile-to-brittle transition that occurs in bcc ferrite, the effects of aging and grain size...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490021
EISBN: 978-1-62708-340-9
... characteristics of metals and their effect on component lifetime and failure. It begins with a review of the ductile-to-brittle transition behavior of steel and the different ways to measure transition temperature. It then explains how to predict fracture loads using linear-elastic fracture mechanics and how...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730023
EISBN: 978-1-62708-283-9
..., the fracture is brittle and absorbs little energy in a Charpy test. Above the transition temperature the fracture is ductile and absorbs a large amount of energy. Figure 3.13 shows typical results for steel. Fig. 3.13 Ductile-brittle transition in a Charpy V-notch specimen of a low-carbon, low-alloy...
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
... of test used to try to establish the ductile/brittle transition temperature, the general results are the same: the lower the temperature for a given steel, the greater the possibility that brittle fracture will occur. For some steels, for example, the ductile/brittle transition temperature under certain...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230209
EISBN: 978-1-62708-298-3
...Abstract Abstract This chapter describes the effect of processing variables on the mechanical properties of beryllium, including tensile and yield strength, fracture toughness, creep and fatigue strength, ductile-to-brittle transition, and notch sensitivity. It also discusses the effects...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780199
EISBN: 978-1-62708-281-5
... simultaneously. Whether the specimen fails by general yielding or by brittle fracture depends on the stress; lower stresses favor brittle fracture. This ductile-brittle transition is analyzed in detail in Ref 9 . At each temperature, there is a critical stress for the ductile-to-brittle failure mode, as shown...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860237
EISBN: 978-1-62708-348-5
.... behavior. The ultimate strength of such a material, which is shown as the ductile failure line, increases much more than the yield strength on cooling. Note that no region of brittle behavior is shown for f.c.c. materials. The large increase in ultimate strength, together with the relatively small yield...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140039
EISBN: 978-1-62708-264-8
... temperature of the small range, called the ductile-brittle transition temperature (DBTT), is often chosen to characterize the temperature where the transition occurs. The simple tensile test will detect this transition, but unfortunately, it detects DBTT values well below those that occur in complex steel...
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
... problem, because it can be avoided easily by quenching from the tempering temperature. As illustrated in Fig. 10.4 , TE is not detected by simple plots of impact energy versus temperature but by more extensive impact testing that measures variation of the ductile-brittle transition temperature (DPTT...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060137
EISBN: 978-1-62708-355-3
...-dependence (rate-dependence) or the equivalent temperature-dependence, and indirectly, as a factor influencing the nature of the failure or fracture, through the sensitivity to strain rate and temperature of the ductile-brittle transition. This transition is usually a gradual one, with the ductility...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060385
EISBN: 978-1-62708-261-7
... to as the ductile-to-brittle transition. Preventive measures to protect against this type of failure mechanism include: Brittle fracture has plagued the aviation industry for years. In the 1950s, several of the first commercial jet aircraft, called the Comet, mysteriously broke into pieces while in level...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610101
EISBN: 978-1-62708-303-4
... at front of crack tip in mode I loading. Source: Ref 2 Fig. 4 Examples of crack configurations and stress-intensity factors. Source: Ref 2 Fig. 5 Variation of K c with specimen dimensions. Source: Ref 2 Fig. 14 Ductile-to-brittle transition typical of steels. Source...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780146
EISBN: 978-1-62708-281-5
... be compromised by a certain level of oxidative degradation occurring only in the first 50 μm below the surface of a 2.5 mm (0.1 in.) thick specimen. Figure 3 ( Ref 53 ) illustrates how surface degradation of a plane strain tension specimen alters the ductile brittle transition in polyethylene creep rupture...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780055
EISBN: 978-1-62708-281-5
... to identify strain-rate-dependent transitions from ductile to brittle behavior. They should be applicable to a wide variety of geometric configurations. Unfortunately, these techniques provide only geometry-specific, single-point data for a specific temperature and strain rate. Also, each test provides...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540047
EISBN: 978-1-62708-309-6
... and what they reveal about the load-carrying characteristics of engineering materials. It then discusses the use of failure criteria and the determination of yielding and fracture limits. It goes on to describe the mechanisms and appearances of brittle and ductile fractures and stress rupture, providing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780314
EISBN: 978-1-62708-281-5
... of mechanical properties. In the study, the tensile strength was found to drop rapidly below a critical weight-average molecular weight of 33,800, and a transition from ductile to brittle failure was also observed at this point. Thus, brittle fracture occurred even in low-speed tensile tests of an injection...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170193
EISBN: 978-1-62708-297-6
... condition than that achievable with either element alone. As conventionally hot rolled, the niobium-vanadium steels derive almost all of their increased strength from precipitation strengthening and therefore have high ductile-brittle transition temperatures. If the steel is controlled rolled, the addition...