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fracture limit line

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540047
EISBN: 978-1-62708-309-6
... of solid solutions of two metals. Source: Ref 2.32 The second set of alloys consists entirely of heterogeneous grain structures. The flow stresses and ductility of such alloys are frequently represented by straight lines between the properties of the pure metals ( Fig. 2.56 ). Of course...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130241
EISBN: 978-1-62708-284-6
... components in conditions of variable loading calls for information not only about the value of the fatigue limit but also about the angle of inclination of the straight line in the range of limited fatigue strength, and also about the parameters of the bend point of the fatigue curve. Modern structural...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780404
EISBN: 978-1-62708-281-5
... essentially a straight line from the origin to the point of fracture, which coincidentally occurs at approximately the same strain as yielding in a ductile polymer. Except for a slight decrease in slope immediately before fracture, the deformation may be considered linearly elastic. Hooke’s law for a...
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.t69540169
EISBN: 978-1-62708-309-6
.... The net section yield limits are represented by two solid lines in Fig. 4.40 . This way, we are not determining residual strengths graphically because net section stress is readily determined by geometry. In summary, the fracture indices are, respectively, K C for the plane-stress (or mixed...
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
... > a ′, the crack does not extend beyond a ′. As the load is increased, the position of the G line changes, as indicated in the figure. When G becomes tangent to R , unstable fracture ensues. The R- curve for a brittle material ( Fig. 13a ) is a square curve, and the crack does not extend at...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410213
EISBN: 978-1-62708-265-5
... where cleavage fracture has occurred. Cleavage in bcc ferrite occurs on {100} planes that have large interplanar spacings relative to the bcc slip planes. The bright lines on the cleavage surfaces are steps between fracture on two parallel but separated cleavage planes. Often, two small steps join...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610055
EISBN: 978-1-62708-303-4
.... In addition, brittle fracture cannot be arrested by a removal of the load, except in very rare circumstances. It is important to note that there is no universally accepted dividing line for ductile and brittle behavior in terms of strain at fracture or in terms of energy absorption. Relative...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610303
EISBN: 978-1-62708-303-4
... a pipeline, for example, then there was apparently a crack of sufficient size to cause the burst. The proof test detects defects above a certain size under controlled circumstances (e.g., with water pressure) to prevent catastrophic failure during operation when the line is filled with oil or gas...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610327
EISBN: 978-1-62708-303-4
.... 35 Fracture toughness values of 13 mm (0.5 in.) thick polycarbonate specimens as functions of environment and loading rate. The lines A, B, and C denote ambient, dry, and wet, respectively. Source: Ref 29 Table 7 Typical K Ic and Izod impact strength values for engineering plastics...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540281
EISBN: 978-1-62708-309-6
... driving force for crack growth will be K . Under steady-state creep, crack growth occurs essentially by creep. The fracture index will be the energy-rate line integral C *, which is considered to be the counterpart of J p for a fully plastic body. The only difference between J p and C * is that...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410405
EISBN: 978-1-62708-265-5
... of carbon in bcc iron ( Ref 18.12 ). Transmission electron microscopy, Fig. 18.9 , showed that the dislocation structure of the martensite in specimens in which serrated yielding had developed consisted of residual linear arrays of screw dislocation lines, in contrast to the high density of tangled...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630117
EISBN: 978-1-62708-270-9
... parallel smear lines that may resemble striations. This kind of damage also may occur when opposite sides of the fatigue fracture rub against each other during compression or shear loading of a crack. For example, a shaft in rotating bending has a tensile stress at one position (convex side) of the...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610001
EISBN: 978-1-62708-303-4
... the Saint Lawrence Seaway described the effect of temperature on equipment: “The crawler pads of shovels and bulldozers subject to stress cracked and crumbled. Drive chains flew apart, cables snapped and fuel lines iced up … And anything made of metal, especially cast metal, was liable to crystallize...
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
... texture. (See Fig. 2 to 7 for illustrations of these marks.) Brittle fractures of some parts may have a pattern of radial lines, or ridges, emanating from the origin in a fanlike pattern. Again, it may be difficult to perceive the texture of the fracture surface unless the lighting is carefully...
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
... liquid. The dashed line at the end of region 3 indicates the effect of lightly cross linking the material. Chemically cross linking the material prevents flow, which in turn obviates region 4. Fig. 1 Log relaxation modulus, E ( t ), as a function of log time, t (or temperature), for a glassy...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630101
EISBN: 978-1-62708-270-9
... observed. Figure 3 , however, shows a low-carbon cast steel tensile specimen with numerous casting discontinuities that tend to emphasize the 45° shear aspect of tensile fracture. The diagonal ridges, frequently called “Lüders lines” or “stretcher strains,” are easily visible in this photograph. A...
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
... cleavage plane of the new grain before being reformed at the next grain boundary. Fig. 13.3 Facetted brittle failure with river lines. Source: Ref 2 As opposed to brittle fractures, ductile failures are associated with large amounts of plastic deformation. As a result of plastic deformation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780216
EISBN: 978-1-62708-281-5
... usefulness, as well as an example of its applicability in the area of impact for plastics, is presented. Finally, there are a number of issues related to process and environment, such as weld lines, chemical attack, and aging, that will affect the impact resistance of plastic. Brief discussions of these...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770037
EISBN: 978-1-62708-337-9
... in the furnace atmosphere (i.e., an increased dew point), the carbon potential would fall in accordance with Fig. 2.4 . Fig. 2.3 Decarburization due to moisture in the furnace fireclay lining. Source: Ref 5 Fig. 2.4 Variation of carbon potential with dew point for an endothermic...