Effect of different shot peening conditions on the fatigue life of 300 M steel submitted to high stress amplitudes

Bag, Amrita; Delbergue, Dorian; Ajaja, Jihane; Bocher, Philippe; Lévesque, Martin; Brochu, Myriam

doi:10.1016/j.ijfatigue.2019.105274

Cited by 35 publications

(14 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The outstanding fatigue properties of burnished pre-ground samples, in comparison to burnished pre-turned samples, are attributed to the better surface roughness (0.080 µm in comparison to 0.281 µm R a ), 16–18 the formation of harder surface layers (358 HV in comparison to 330 HV) 10,21 and exhibition of compressive residual stresses. 19–20 As mentioned before, a lower surface roughness delays the fatigue crack nucleation in stress concentration regions, 24 thereby increasing the fatigue life. On the other hand, increasing the surface hardness makes the movement of dislocations more difficult, 10 and therefore, the crack initiation is delayed further.…”

Section: Resultsmentioning

confidence: 87%

“…The surface roughness is one of the most important parameters influencing the fatigue life of components because it is assumed to be detrimental to fatigue crack nucleation due to the stress concentration factor. 24…”

Section: Resultsmentioning

confidence: 99%

“…Similar trends were observed for R pm , R t , and R z . According to Bag et al., 24 the corresponding stress concentration factor K t can be expressed by the following equation where R Sm is the mean spacing between successive peaks within the sampling length. On the other hand, as shown in Figure 5, R t was reduced by 34.81%, 64.85%, and 83.84% for the ground, burnished pre-turned, and burnished pre-ground samples, respectively, in comparison to the turned samples.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Fatigue behavior improvement of hardened parts using sequential hard turning, grinding, and ball burnishing operations

Arsalani

Razfar

Abdullah

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

One of the major problems encountered in hardened components such as roller bearings, which work under fatigue loading conditions, is that the requirement of higher surface finishes (≈0.15 µm Ra) cannot be achieved by the sequential hard turning and ball burnishing processes. Such high surface qualities can be generated by additional finishing operations such as grinding. However, despite the improvement in the surface roughness, the grinding process increases both the tensile surface residual stresses and crack initiation sites on the ground surface; therefore, the fatigue behavior of the component may deteriorate. In this study, the effects of adding a grinding operation before the ball burnishing process on the fatigue behavior of AISI 4130 steel were experimentally studied. According to the achieved results, the burnished pre-ground samples show a considerable reduction in the final surface roughness and, at the same time, higher microhardness, higher endurance limit, and smaller area of the fatigue cracking zone. The burnished pre-turned and burnished pre-ground samples showed 4.24% and 10.95% improvements in the endurance limit compared to that of the turned samples, respectively.

show abstract

Section: Resultsmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Fatigue behavior improvement of hardened parts using sequential hard turning, grinding, and ball burnishing operations

Arsalani

Razfar

Abdullah

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

show abstract

“…The models considered were the generalized extreme value (GEV), log-normal, normal and Weibull distributions. The log-normal distribution, frequently used to characterize fatigue life data of polished samples [37,38], best fit the majority of the results as expanded upon in Section 3.3. The probability density function f log −normal (x) for a random variable x following the log-normal distribution is given by:…”

Section: Probabilistic Analysismentioning

confidence: 89%

Effect of Platform Temperature and Post-Processing Heat Treatment on the Fatigue Life of Additively Manufactured AlSi7Mg Alloy

Martins

Provencher

Brochu

et al. 2021

Metals

Self Cite

View full text Add to dashboard Cite

The effect of platform temperature combined with a T5 heat treatment on the fatigue life of additively manufactured aluminum alloy AlSi7Mg was characterized and understood. High-cycle fatigue tests were carried out on samples built with four platform temperatures (35 °C, 60 °C, 80 °C and 200 °C) and post-processing heat treatment strategies (F and T5). Microstructural and fractographic observations combined with microhardness measurements were performed. A log-normal statistical distribution regressed with 90% B-basis probabilities of survival revealed that specimens produced on a platform maintained at 80 °C and post-processed with a T5 heat treatment presented the highest fatigue life among the conditions tested. Precipitation of silicon within the aluminum cells during the T5 heat treatment is the proposed explanation for the improved fatigue life of the T5 samples. In the as-built condition, specimens produced at 200 °C were found to be less resistant to fatigue than the specimens built at lower temperatures. The coarser microstructure and lowest microhardness resulting from high-temperature manufacturing explain this reduced fatigue strength. All fatigue cracks initiated from manufacturing discontinuities. This led to a fatigue life prediction model based upon linear elastic fracture mechanics. The model was fitted to the experimental results of the F and T5 samples separately. With the exception of the 35 °C—T5 specimens, the predicted fatigue lives agree with the experimental results and literature.

show abstract

“…Surface treatments that generate compression-type residual stresses are ideal for improving the fatigue life of the treated parts [18]. Shot peening processes have been used to effectively improve fatigue strength of steel alloys [19,20].…”

Section: Introductionmentioning

confidence: 99%

Effects of shot peening and artificial surface defects on fatigue properties of 50CrV4 steel

Saklakoğlu

Bolouri

İrizalp

et al. 2021

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Shot peening processes are commonly used for improving the fatigue properties of steels. Shot peening introduces a compressive residual stress field in the near surface of steel, which can reduce or stop the growth of fatigue cracks and improve fatigue properties. This study experimentally investigated the effect of shot peening on the fatigue properties of 50CrV4 steel alloys with different artificial surface defects. Drilling tools were used to introduce different artificial defects with root radii of 0.585 mm and 0.895 mm on the surface of unpeened samples. The shot peening was applied to the drilled and undrilled samples. Scanning electron microscopy (SEM) observations, micro-hardness and X-ray diffraction residual stress measurements were conducted to analyse the characteristics of the shot-peened and unpeened samples. The results show that the shot peening leads to the transformation of the retained austenite to martensite in the near-surface microstructure. The hardness rates of the surface and near surface both increase by 8% after the shot peening. The peened samples exhibit compressive residual stresses with a high degree of isotropy in the near surface. The fatigue properties of samples were experimentally evaluated by conducting 3-point bending tests. The results indicate that the shot peening improves the fatigue life of drilled and undrilled samples. For the defects with the root radius of 0.895 mm, the shot peening leads to a 500% improvement in the fatigue life compared to unpeened samples regardless of defect depth. For the defects with the root radius of 0.585 mm, the improvement in fatigue life is 40% for the defect depth of 0.2 mm compared to unpeened samples. The improvement increases to 60% and 200% by increasing the defect depths to 0.4 mm and 0.6 mm. The fatigue properties are linked to the changes in the features of defects mainly caused by the deformation hardening and compressive residual stress after shot peening.

show abstract

Effect of different shot peening conditions on the fatigue life of 300 M steel submitted to high stress amplitudes

Cited by 35 publications

References 23 publications

Fatigue behavior improvement of hardened parts using sequential hard turning, grinding, and ball burnishing operations

Fatigue behavior improvement of hardened parts using sequential hard turning, grinding, and ball burnishing operations

Effect of Platform Temperature and Post-Processing Heat Treatment on the Fatigue Life of Additively Manufactured AlSi7Mg Alloy

Effects of shot peening and artificial surface defects on fatigue properties of 50CrV4 steel

Contact Info

Product

Resources

About

Effect of different shot peening conditions on the fatigue life of 300 M steel submitted to high stress amplitudes

Cited by 35 publications

References 23 publications

Fatigue behavior improvement of hardened parts using sequential hard turning, grinding, and ball burnishing operations

Fatigue behavior improvement of hardened parts using sequential hard turning, grinding, and ball burnishing operations

Effect of Platform Temperature and Post-Processing Heat Treatment on the Fatigue Life of Additively Manufactured AlSi7Mg Alloy

Effects of shot peening and artificial surface defects on fatigue properties of 50CrV4 steel

Contact Info

Product

Resources

About

Effect of different shot peening conditions on the fatigue life of 300 M steel submitted to high stress amplitudes