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crack shape

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Published: 01 August 2018
Fig. 10.34 Cracks showing decarburized edges. The crack shape suggests these can be quench cracks from a previous heat treatment (see the section 10.3.5 “Quench Cracks” in this chapter). Decarburization happened during an annealing or normalizing heat treatment that resulted in the observed More
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Published: 01 August 2005
Fig. 4.6 Effect of strain-hardening exponent on crack-tip plastic zone shape. Source: Ref 4.15 , 4.16 More
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Published: 01 August 2005
Fig. 4.7 Effect of strain-hardening exponent on crack-tip plastic zone shape for three low-alloy steels and one aluminum. Source: Ref 4.15 , 4.16 More
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Published: 01 August 2005
Fig. 5.42 Typical shape of a fatigue crack growth rate curve for a given R value More
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Published: 01 December 2018
Fig. 6.145 (a) Unetched micrograph indicating wedge-shaped fine hairline cracks emanating from the surface, 100×. (b) SEM image showing fatigue striations for corrosion fatigue failure, 1000× More
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Published: 30 November 2013
Fig. 36 Characteristic X-shaped crack pattern in a grade 1045 steel crankshaft after testing in reversed torsional fatigue in a special machine, not in an engine. In this case, the original crack was in the transverse shear plane, not in the longitudinal shear plane as in Fig. 35 . More
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Published: 30 November 2013
Fig. 4 Comparison of wedge-shaped cracks and creep voids: (a) triple-point stress rupture (60×); (b) creep cavitation damage (arrows) in a desuperheater inlet header (1000×) More
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Published: 01 December 2003
Fig. 8 An S-shaped fatigue crack propagation. K , stress-intensity factor; K c , fracture toughness curve indicating its three characteristic regions. More
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Published: 01 December 1995
Fig. 23-2 (a) Flaw shape parameter curves for surface and internal cracks. (b) Graphical solutions for an internal disc shape flaw, embedded in a large body (tension loading). (c) Graphical solution for an elliptical surface crack tension loading More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930023
EISBN: 978-1-62708-359-1
... Abstract This article describes the weldability tests that are used to evaluate the effects of welding on such properties and characteristics as base-metal and weld-metal cracking; base-metal and weld-metal ductility; weld penetration; and weld pool shape and fluid flow. It also describes...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870201
EISBN: 978-1-62708-344-7
... premise of a stress field in the vicinity of the crack also applies to the study of cycle-by-cycle stable crack growth. A detailed review is given of the many developments and discoveries that helped shape the theory and methods collectively defined as crack mechanics, which the authors then employ...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480113
EISBN: 978-1-62708-318-8
..., and ductility as well as creep, fatigue strength, and fatigue crack growth rate. It also discusses the influence of other titanium phases and the properties of titanium-based intermetallic compounds, metal-matrix composites, and shape-memory alloys. alloy composition alpha titanium alloys alpha-beta...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1996
DOI: 10.31399/asm.tb.phtpclas.t64560087
EISBN: 978-1-62708-353-9
... Abstract This chapter examines the cooling of steels from the austenite region. It describes the processes of determining the severity of quench. The chapter examines the methods to estimate the quench required if the size and shape of the part are known and the required cooling rate is known...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910301
EISBN: 978-1-62708-250-1
... of the design team in producing a successful final design, general considerations in corrosion-control design, and design details that accelerate corrosion. The details that must be considered when attempting to control corrosion by design include plant/site location, plant environment, component/assembly shape...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220353
EISBN: 978-1-62708-259-4
... Abstract This chapter discusses the effects of hot working on the structure and properties of steel. It explains how working steels at high temperatures promotes diffusion, which helps close cavities and pores, and how it changes the shape and distribution of segregates, offsetting their effect...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290099
EISBN: 978-1-62708-306-5
.... The commonly encountered inclusions, as well as cracking, the most serious of weld defects, are discussed in this section. 5.6.1 Gas Porosity Gas porosity can occur on or just below the surface of a weld. Pores are characterized by a rounded or elongated teardrop shape with or without a sharp point...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740373
EISBN: 978-1-62708-308-9
... cracks, density variations, and microlaminations. powder characteristics powder metallurgy POWDER METALLURGY (P/M) is the process of blending fine powdered materials, pressing (compacting) them into a desired shape or form, and then heating the compressed material in a controlled atmosphere...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930003
EISBN: 978-1-62708-359-1
... Abstract It is well established that solidification behavior in the fusion zone controls the size and shape of grains, the extent of segregation, and the distribution of inclusions and defects such as porosity and hot cracks. Since the properties and integrity of the weld metal depend...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540215
EISBN: 978-1-62708-309-6
..., is usually modeled as one-half of an ellipse ( Fig. 5.16 ). Either the major or the minor axis of the ellipse may be placed on the front surface of the plate. As shown in Fig. 5.16 , the length and depth of the crack are designated as 2 c and a , respectively. The crack shape is described by an aspect...
Image
Published: 30 November 2013
into the hardened steel, as shown in this section. The orientation is the same as in Fig. 5(b) , in which the sliding is to the left and the rolling is to the right, producing negative sliding. (b) Highly magnified view (1000×) of the surface of a negative-sliding roller. The many small, V-shaped cracks More