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crack propagation tests

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Published: 01 November 2010
Fig. 8.8 Wedge-crack propagation test results. Source: Ref 1 More
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Published: 01 August 2005
Fig. 5.61 Schematic stress profiles for fatigue crack propagation testing showing the effects of overload/underload with hold time. Source: Ref 5.72 More
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Published: 01 August 1999
Fig. 17 Crack propagation rates in stress-corrosion tests using precracked specimens of high-strength 2 xxx series aluminum alloys, 25 mm thick, double antilever beam, T-L (S-L) orientation of plate, wet twice a day with an aqueous solution of 3.5% NaCl, 23 °C. Source: Ref 13 More
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Published: 01 August 1999
Fig. 20 Crack propagation rates in stress corrosion tests using 7 xxx series aluminum alloys, 25 mm thick, double cantilever beam (DCB), short-transverse orientation of die transverse orientation of die forgings and plate, alternate immersion tests, 23 °C. Source: Ref 13 More
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Published: 01 August 2005
Fig. 5.68 Influence of testing temperature on fatigue crack propagation exponent for iron-base alloys. Source: Ref 5.83 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090367
EISBN: 978-1-62708-266-2
... Abstract This chapter addresses the challenge of selecting an appropriate stress-corrosion cracking (SCC) test to evaluate the serviceability of a material for a given application. It begins by establishing a generic model in which SCC is depicted in two stages, initiation and propagation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780238
EISBN: 978-1-62708-281-5
... Abstract This article reviews fatigue test methodologies, provides an overview of general fatigue behavior (crack initiation and propagation) in engineering plastics, and discusses some of the factors affecting the fatigue performance of polymers. In addition, it provides information...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870099
EISBN: 978-1-62708-299-0
..., which has had over 30 years of experience in military aircraft with no record of SCC problems. Typical data on 2 xxx alloys are shown in Fig. 17 . Fig. 17 Crack propagation rates in stress-corrosion tests using precracked specimens of high-strength 2 xxx series aluminum alloys, 25 mm thick...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030126
EISBN: 978-1-62708-282-2
... force for crack propagation) is quantified by the stress intensity factor, K , for the specific crack and loading geometry. As a result, the crack propagation rate, da/dt , is plotted versus K as illustrated in Fig. 2 . These tests can be configured such that K increases with crack length...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780249
EISBN: 978-1-62708-281-5
... tested at stress amplitude (σ α ) = 25.4 MPa (3.68 ksi) and in high-impact polystyrene tested at σ α = 11.6 MPa (1.68 ksi) An FCP mechanism frequently involves damage formation, which precedes crack initiation and propagation. On the other hand, the micromechanism underlying yielding (softening...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090001
EISBN: 978-1-62708-266-2
..., the crack propagation rate, da/dt , is plotted versus K , as illustrated in Fig. 1.2 . These tests can be configured such that K increases with crack length (constant applied load), decreases with increasing crack length (constant crack mouth opening displacement), or is approximately constant...
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Published: 01 August 2005
Fig. 2.98 Stress-corrosion cracking in an extruded Mg-6Al-1Zn alloy tested in a salt-chromate solution. (a) Intergranular crack propagation in the face-cooled alloy. (b) Transgranular crack propagation in the water-quenched material. Source: Ref 2.72 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540215
EISBN: 978-1-62708-309-6
... presents and discusses some frequently used mode 1 (crack opening mode) stress-intensity factors. Several crack geometries simulate those found in structural/machine parts, or used as laboratory test specimens for fatigue crack growth and fracture testing. 5.1.1 Two-Dimensional Crack For a given...
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Published: 01 January 2017
Fig. 9.3 Stress-corrosion cracking in an extruded Mg-6Al-1Zn alloy tested in a salt-chromate solution, showing (a) intergranular crack propagation in the furnace-cooled alloy and (b) transgranular propagation in the water-quenched material. Source: Ref 9.26 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270173
EISBN: 978-1-62708-301-0
...). was found cracked. There were actually two cracks, one originat- ing from the front side and the other from the rear side, propagating Testing Procedure and Results through the thickness. Fluctuating loads of high magnitude acted on both sides of the diaphragm, causing the two fatigue cracks. The crack...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270160
EISBN: 978-1-62708-301-0
... Abstract The nose bullet of an aircraft engine developed a crack and was removed and examined to determine the cause. The bullet was made from a titanium alloy and was of welded construction. Close-up views show that the crack originated in an area of rework along the weld seam and propagated...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630257
EISBN: 978-1-62708-270-9
..., the three stages that occur during the fatigue life of a structure are crack initiation, crack propagation, and final rupture. The second stage, fatigue-crack growth, or propagation, is of primary importance. Crack growth testing is performed on samples with established K I versus crack length...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540395
EISBN: 978-1-62708-309-6
... of forging); T, width, long-transverse grain direction; S, thickness, short-transverse grain direction. First letter: normal to the fracture plane (loading direction); second letter: direction of crack propagation in fracture plane Fig. A6.3 ASTM crack plane orientation identification code...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270143
EISBN: 978-1-62708-301-0
... by mechanical damage. coating cracks fatigue failure fractography turbine rotor blade visual examination Summary A low-pressure turbine rotor (LPTR) blade failed during a test run causing damage to all the blades. The blade had failed by fatigue and the fatigue crack had initiated at surface...
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Published: 01 January 2017
Fig. 1.19 Variation in the average crack propagation rate in sensitized type 304 stainless steel in water at 288 °C (550 °F) with oxygen content. Data are from constant-extension-rate testing, constant-load testing, and field observations on boiling water reactor piping. IGSCC, intergranular More