The role of ductility, tensile strength and fracture toughness in fatigue

Manson, S. S.; Hirschberg, M. H.

doi:10.1016/0016-0032(70)90236-x

Cited by 25 publications

(10 citation statements)

References 3 publications

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“…A material with a high yield strength absorbs a larger portion of applied stress or strain within its elastic strain regime, compared to a weaker material with the same elastic modulus. Plastic yielding and higher amount of plastic strain is observed in the latter [31]. A higher ductility, on the other hand, can help in avoiding sudden failure.…”

Section: Fatigue Behaviour Of As-built Samplesmentioning

confidence: 91%

“…The microstructure of the material, which directly impacts its strength and ductility, also influences its fatigue performance to some extent. Fatigue is mainly associated with localised plastic flow and hence a material with good plastic flow behaviour is expected to possess desirable fatigue properties [28,31]. Plastic flow of a material is related to the mobility of dislocations.…”

Section: Fatigue Behaviour Of As-built Samplesmentioning

confidence: 99%

“…Though the tensile results are not statistically different between the two conditions, they tend to show a small reduction in yield strength and increase in ductility after stress relief. This can be related to the slight coarsening taking place during SR. Generally when comparing fatigue behaviour between two metals with the same elastic modulus but with differing yield strength and ductility values, the fatigue responses intersect each other [31]. If A and B are two metals with yield strengths σ A and σ B and ductilities D A and D B , respectively, such that σ A <σ B and D A >D B , the fatigue behaviour will be as shown in Figure 9 [31].…”

Section: Influence Of Stress Relief Heat Treatmentmentioning

confidence: 99%

“…Figure 9: Fatigue response of two metals with differing strength and ductility [31] At high applied loads, multiple cracks initiate from stress concentration points along the surface that undergo higher localised stresses than the nominal stress. One or few of these cracks develop into dominant or propagating cracks.…”

Section: Influence Of Stress Relief Heat Treatmentmentioning

confidence: 99%

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Effect of post-treatments on the fatigue behaviour of 316L stainless steel manufactured by laser powder bed fusion

Elangeswaran

Cutolo

Muralidharan

et al. 2019

International Journal of Fatigue

148

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This paper investigates the influence of post treatments on the fatigue properties of 316L stainless steel produced by laser powder bed fusion. Miniaturised fatigue samples are built in vertical orientation with optimised process conditions to result in very low porosities and minimal scatter in results. Fatigue performance is evaluated for two different material conditions: as-built and stress-relieved, at a nominal load ratio of -1. Furthermore, the samples are tested with and without surface machining. A thorough microstructural and fractographic analysis is performed to evaluate the impact of the main fatigue influencing factors. The results show that the fatigue behaviour of machined samples with and without stress relief heat treatment exceeds that of conventionally manufactured 316L.

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Section: Fatigue Behaviour Of As-built Samplesmentioning

confidence: 91%

Section: Fatigue Behaviour Of As-built Samplesmentioning

confidence: 99%

Section: Influence Of Stress Relief Heat Treatmentmentioning

confidence: 99%

Section: Influence Of Stress Relief Heat Treatmentmentioning

confidence: 99%

See 2 more Smart Citations

Effect of post-treatments on the fatigue behaviour of 316L stainless steel manufactured by laser powder bed fusion

Elangeswaran

Cutolo

Muralidharan

et al. 2019

International Journal of Fatigue

148

View full text Add to dashboard Cite

show abstract

“…By contrast, at high strain ranges, materials of higher ductility have higher crack-initiation resistance. Since strength level and ductility are usually inversely related, fatigue resistance involves a tradeoff among strength and ductility on the assumption of high fracture toughness without defects [34].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

High-Cycle, Low-Cycle, Extremely Low-Cycle Fatigue and Monotonic Fracture Behaviors of Low-Carbon Steel and Its Welded Joint

Kim

Hwang

2019

Materials

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Low-carbon steels are commonly used in welded steel structures and are exposed to various fatigue conditions, depending on the application. We demonstrate that the various transitions in the fracture mode during fatigue testing can be distinguished by their different cyclic response curves and microstructural features after fracture. Fractography, surface damage micrographs, and microstructural evolution clearly indicated the transition of the fracture modes from high-cycle to low-cycle, extremely low-cycle fatigue, and monotonic behavior. The high-cycle fatigue mode showed initial cyclic softening, followed by cyclic stabilization, and showed inclusion-induced crack initiation at fish-eyes, while the low-cycle fatigue mode showed initial cyclic hardening followed by cyclic stabilization, where fractography images showed obvious striations. In addition, the extremely low-cycle fatigue mode showed no cyclic stabilization after initial cyclic hardening, which was characterized by quasi-cleavage fractures with a few micro-dimples and transgranular cracking, while the monotonic fracture mode predominantly showed micro-dimples.

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Effects of liquids on the long-term strength of lucite under cyclic elastoplastic deformation

Yatsyuk¹,

Soshko²,

Tkachev³

et al. 1975

Mater Sci

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The role of ductility, tensile strength and fracture toughness in fatigue

Cited by 25 publications

References 3 publications

Effect of post-treatments on the fatigue behaviour of 316L stainless steel manufactured by laser powder bed fusion

Effect of post-treatments on the fatigue behaviour of 316L stainless steel manufactured by laser powder bed fusion

High-Cycle, Low-Cycle, Extremely Low-Cycle Fatigue and Monotonic Fracture Behaviors of Low-Carbon Steel and Its Welded Joint

Effects of liquids on the long-term strength of lucite under cyclic elastoplastic deformation

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