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quasi-cleavage fracture

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Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630063
EISBN: 978-1-62708-270-9
...Abstract Abstract From a fundamental standpoint, there are only two modes, or ways, in which metals can fracture under single, or monotonic, loads: shear and cleavage. There are fracture modes other than shear and cleavage. These include intergranular and quasi-cleavage fracture modes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610055
EISBN: 978-1-62708-303-4
... mechanism. Microscale examination of the fracture surface shows that the highly reflective regions of the fracture surface are created by cleavage or quasi-cleavage while the thin, arced arrest regions failed by MVC. As shown in Fig. 40 , some bcc and hcp metals, and steels in particular, exhibit...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540047
EISBN: 978-1-62708-309-6
... Martensite (Quasi-Cleavage) by Single Surface Trace Analysis , Metall. Trans. , Vol 4 , 1973 , p 1999 – 2000 10.1007/BF02665434 2.21. Briant C.L. and Banerji S.K. , Intergranular Fracture in Steel: The Role of Grain-Boundary Composition , Int. Met. Rev. , No 4 , 1978 , p 164...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090419
EISBN: 978-1-62708-266-2
..., somewhat similar to fatigue. The crack or cracks grow gradually over a period of time until a critical size is achieved, creating a diminished cross-sectional area that may cause the remaining metal to suddenly fail. Microfractography of transgranular cracks may reveal cleavage or quasi-cleavage...
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
...-shaped pattern radiating from the origin region in the upper left corner. When viewed under the electron microscope, this type of fracture is likely to reveal a cleavage or quasi-cleavage fracture mode. (b) Fracture surface of a large (~5-¾ × 6 in.) equalizer bar made from D6B steel heat treated...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.9781627082709
EISBN: 978-1-62708-270-9
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.9781627082563
EISBN: 978-1-62708-256-3
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540357
EISBN: 978-1-62708-309-6
... and tempered steels, the fracture process is called “quasi-cleavage.” The dividing line between cleavage and quasi-cleavage is somewhat arbitrary. Crack formation is generally considered the result of intersecting deformation twins. The appearance of twins before cleavage fracture is a general phenomenon...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030148
EISBN: 978-1-62708-282-2
... be characterized by ductile dimple rupture, tearing, cleavage, quasi-cleavage, and, less frequently under certain conditions, intergranular cracking. The article “ Modes of Fracture ” in Fractography , Volume 12 of ASM Handbook , formerly Metals Handbook , 9th ed., contains fractographs illustrating the effects...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130503
EISBN: 978-1-62708-284-6
..., interdendritic, or cleavage modes of fracture, which occur at stress levels well below the yield stress. Additionally, even failures by quasi-cleavage and/or microvoid coalescence can occur at reduced levels of ductility. Such cracking is illustrated in discontinuities 11 and 12a through 12g in Fig. 1...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130043
EISBN: 978-1-62708-284-6
... inclusions will delay the onset of cleavage-type fracture by localized relaxation of stresses. At the same time, the yield stress also increases. During deformation, forming, or forging, the ductile inclusion MnS has a marked effect on the ductility of the final product. Types 1 and 2 MnS inclusions...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130111
EISBN: 978-1-62708-284-6
... extension may occur by the brittle mechanism of cleavage, even though extensive elongation accompanied or preceded crack initiation. The fracture may be classified as either ductile or brittle, depending on whether the mechanism is describing crack initiation or crack growth, respectively. Likewise, the low...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.9781627083096
EISBN: 978-1-62708-309-6
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540297
EISBN: 978-1-62708-309-6
...) undergoes a quasi-rubber-like behavior; the deformations are homogeneous and the final strain is very large (see curve 4). Actual test data for the PMMA showing the stress-strain behavior at different temperatures are given in Fig. 7.12(b) . Comparing Fig. 7.12(a) with Fig. 7.12(b) , it is evident...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230209
EISBN: 978-1-62708-298-3
... ]. The large increase in ductility starting at approximately 200 °C is attributed to a shift from basal-plane cleavage to a shear fracture. The peak in ductility and its subsequent fall is attributed partly to the decrease in tensile strength and partly to the formation of low-melting phases along the grain...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.9781627082587
EISBN: 978-1-62708-258-7
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 intermediate temperature (center), the fracture is combined shear and cleavage. At the lowest temperature (right), the fracture is virtually complete cleavage. Note increased deformation with increased temperatures. Source: Ref 9 Several variations on the basic Charpy test specimen are shown in Fig...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540169
EISBN: 978-1-62708-309-6
... dynamic toughness in a quasi-static fracture test, which basically involves applying a fast loading rate to conduct an ordinary K IC test. Procedures for this “rapid-load K IC (t) test” are given in a special annex to ASTM Standard E 399 for plane-strain fracture testing. For conventional K IC...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090317
EISBN: 978-1-62708-266-2
... aqueous chloride solutions ( Ref 12.2 , 12.19 , 12.38 ). Oxygen-related subcritical crack growth is distinct in that it occurs transgranularly, resulting in quasi-cleavage-appearing fracture surfaces ( Ref 12.19 ). This transgranular failure has been observed in alloys as dilute as U-2.25Nb ( Ref 12.25...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980141
EISBN: 978-1-62708-342-3
... of a eutectic binary alloy [ Ber 83 ] Fig. 4.11 Tertiary system representation. (a) Isothermal section (temperature T 1 = constant). (b) Quasi-binary section (alloy component B, e.g., 40%) [ Ber 83 ] Fig. 4.13 Precipitation of a two-phase system [ Wie 86 ] Fig. 4.14 Time...