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Book Chapter

Fatigue Strength of Metals

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540121
EISBN: 978-1-62708-309-6
... their use on different metals and alloys. The chapter also discusses design-based approaches for preventing fatigue failures. crack initiation crack propagation fatigue analysis fatigue fracture appearance fatigue life fatigue strength THE DEFINITION OF “FATIGUE” according to ASTM Standard E...
Abstract
This chapter examines the stress-strain characteristics of metals and alloys subjected to cyclic loading and the cumulative effects of fatigue. It begins by explaining how a single load reversal can lower the yield stress of a material and how repeated reversals can cause strain hardening and softening, both of which lead to premature failure. It then discusses the stages of fatigue fracture, using detailed images to show how cracks initiate and grow and how they leave telltale marks on fracture surfaces. It goes on to describe fatigue life assessment methods and demonstrate their use on different metals and alloys. The chapter also discusses design-based approaches for preventing fatigue failures.
View PDF for content titled, <span class="search-highlight">Fatigue</span> <span class="search-highlight">Strength</span> of Metals
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Effect of material tensile strength or the fatigue strength of welded and u...

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in Fracture Mechanics and Service Fitness of Welds[1] > Weld Integrity and Performance
Published: 01 July 1997
Fig. 6 Effect of material tensile strength or the fatigue strength of welded and unwelded specimens More
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Relation between the fatigue strength and the tensile strength for several ...

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in Modeling and Use of Correlations in Heat Treatment > Principles of the Heat Treatment of Plain Carbon and Low Alloy Steels
Published: 01 December 1996
Fig. 9-27 Relation between the fatigue strength and the tensile strength for several steels. The straight lines have the slope shown. (Adapted from a compilation of T.J. Dola and C.S. Yen, Proc. ASTM , Vol 48, p 664 (1948), Ref 26 ) More
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The fatigue strength as a function of yield strength for steels. (From C.R....

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in Modeling and Use of Correlations in Heat Treatment > Principles of the Heat Treatment of Plain Carbon and Low Alloy Steels
Published: 01 December 1996
Fig. 9-28 The fatigue strength as a function of yield strength for steels. (From C.R. Brooks, The Heat Treatment of Ferrous Alloys , Hemisphere Publishing Corporation/McGraw-Hill Book Company, New York (1979), Ref 27 ) More
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Relationships between the fatigue strength and tensile strength of some wro...

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in Fatigue and Fracture of Engineering Alloys > Fatigue and Fracture<subtitle>Understanding the Basics</subtitle>
Published: 01 November 2012
Fig. 32 Relationships between the fatigue strength and tensile strength of some wrought aluminum alloys. Source: Ref 11 More
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Comparative notched fatigue strength. Source: Ref 1.9

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in Introduction and Uses of Lightweight Materials > Lightweight Materials: Understanding the Basics
Published: 01 October 2012
Fig. 1.19 Comparative notched fatigue strength. Source: Ref 1.9 More
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Fatigue strength comparison for aluminum. Source: Ref 2.1

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in Aluminum Alloys > Lightweight Materials: Understanding the Basics
Published: 01 October 2012
Fig. 2.1 Fatigue strength comparison for aluminum. Source: Ref 2.1 More
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Scatter in fatigue strength of LP rotor material due to forging tears ( Ref...

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in Life Assessment of Steam-Turbine Components > Damage Mechanisms and Life Assessment of High-Temperature Components
Published: 01 December 1989
Fig. 6.34. Scatter in fatigue strength of LP rotor material due to forging tears ( Ref 21 ). More
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Frequency versus the log of the standard deviation in fatigue strength in k...

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in Factors Influencing Weldment Fatigue[1] > Weld Integrity and Performance
Published: 01 July 1997
Fig. 6 Frequency versus the log of the standard deviation in fatigue strength in ksi More
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Frequency versus the log of the standard deviation in fatigue strength in k...

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in Factors Influencing Weldment Fatigue[1] > Weld Integrity and Performance
Published: 01 July 1997
Fig. 7 Frequency versus the log of the standard deviation in fatigue strength in ksi More
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Variation in the log of the standard deviation in fatigue strength in ksi w...

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in Factors Influencing Weldment Fatigue[1] > Weld Integrity and Performance
Published: 01 July 1997
Fig. 14 Variation in the log of the standard deviation in fatigue strength in ksi with fatigue notch factor ( K f ). The uncertainty in the fatigue strength of terminations would seem to be generally less than that of the toe and ripple. More
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Predicted fatigue strength of a cruciform weld model ( Fig. 16 ) for mild s...

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in Factors Influencing Weldment Fatigue[1] > Weld Integrity and Performance
Published: 01 July 1997
Fig. 24 Predicted fatigue strength of a cruciform weld model ( Fig. 16 ) for mild steel ( S y = 36 ksi, 250 MPa) and quenched-and-tempered (QT) steel ( S y = 100 ksi, 690 MPa). R = 0; T given in inches. Quenched-and-tempered steels show no advantage for all nominal types in as-welded More
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The predicted effect of various fatigue strength improvement treatments on ...

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in Factors Influencing Weldment Fatigue[1] > Weld Integrity and Performance
Published: 01 July 1997
Fig. 25 The predicted effect of various fatigue strength improvement treatments on the fatigue strength of a mild steel, non-load-carrying cruciform weldment. The “nominal” joint fatigue (shaded at the lower strength levels) did not benefit from the indicated treatments as much as the “ideal More
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Effect of stress relief on fatigue strength of 5456-H3221 longitudinal butt...

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in Properties of Aluminum-Alloy Welds[1] > Weld Integrity and Performance
Published: 01 July 1997
Fig. 19 Effect of stress relief on fatigue strength of 5456-H3221 longitudinal butt welds. Source: Ref 38 More
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The fatigue strength as a function of hardness for quenched and tempered st...

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in Modeling and Use of Correlations in Heat Treatment > Principles of the Heat Treatment of Plain Carbon and Low Alloy Steels
Published: 01 December 1996
Fig. 9-30 The fatigue strength as a function of hardness for quenched and tempered steels. (From same source as Fig. 9-28 ) More
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Contact fatigue strength of carburized 25Kh2GHTA steel (tempered at 180 to ...

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in Sources of Failures in Carburized and Carbonitrided Components > Failure Analysis of Heat Treated Steel Components
Published: 01 September 2008
Fig. 65 Contact fatigue strength of carburized 25Kh2GHTA steel (tempered at 180 to 200 °C) More
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Fatigue strength comparison for aluminum. Source: Ref 2

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in Aluminum > Elements of Metallurgy and Engineering Alloys
Published: 01 June 2008
Fig. 26.1 Fatigue strength comparison for aluminum. Source: Ref 2 More
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Influence of stress ratio R on fatigue strength. UTS, ultimate tensile st...

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in Fatigue of Metals > Fatigue and Fracture<subtitle>Understanding the Basics</subtitle>
Published: 01 November 2012
Fig. 5 Influence of stress ratio R on fatigue strength. UTS, ultimate tensile strength; YS, yield strength. Source: Adapted from Ref 4 More
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Loss of fatigue strength from the abusive grinding of 4340 steel quenched a...

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in Fatigue of Metals > Fatigue and Fracture<subtitle>Understanding the Basics</subtitle>
Published: 01 November 2012
Fig. 50 Loss of fatigue strength from the abusive grinding of 4340 steel quenched and tempered to 50 HRC. UTM, untempered martensite. Source: Ref 27 More
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Comparison of fatigue strength bands for 2014-T6, 2024-T4, and 7075-T6 alum...

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in Fatigue and Fracture of Engineering Alloys > Fatigue and Fracture<subtitle>Understanding the Basics</subtitle>
Published: 01 November 2012
Fig. 30 Comparison of fatigue strength bands for 2014-T6, 2024-T4, and 7075-T6 aluminum alloys for rotating beam tests. Source: Ref 16 More