Experimental Investigation of Principal Residual Stress and Fatigue Performance for Turned Nickel-Based Superalloy Inconel 718

Hua, Yang; Liu, Zhanqiang

doi:10.3390/ma11060879

Cited by 47 publications

(32 citation statements)

References 30 publications

(29 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The material was divided into Φ14 mm × 140 mm cylinder bars using wire cutting electrical discharge machining (WEDM). The chemical compositions of the material are summarized in Table 1 [22]. The mechanical properties of the material at room temperature are shown in Table 2 [22].…”

Section: Workpiece Materials and Specimen Preparationmentioning

confidence: 99%

“…The chemical compositions of the material are summarized in Table 1 [22]. The mechanical properties of the material at room temperature are shown in Table 2 [22]. Four different turning processes were carried out to evaluate the influence of residual shear and normal stress on fatigue life and SIF.…”

Section: Workpiece Materials and Specimen Preparationmentioning

confidence: 99%

“…Uniaxial tension-tension fatigue tests were carried out to study the influence of residual stress on the fatigue performance of Inconel 718. All the turned specimens were polished by hand to reduce the influence of surface roughness (Ra) on fatigue life even though the experimental results in the literature [16,17,22] concluded that, compared with residual stress, the surface roughness had a less significant role on fatigue life. All fatigue tests were performed on a fatigue testing machine PLG-100 with a maximum frequency of 250 Hz at room temperature.…”

Section: Fatigue Testsmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Machining Induced Residual Shear and Normal Stresses on Fatigue Life and Stress Intensity Factor of Inconel 718

Hua

Wang

2019

Applied Sciences

Self Cite

View full text Add to dashboard Cite

Residual shear stresses and normal stresses induced by machining affect the fatigue performance of components. Thus, residual shear and normal stresses should be considered simultaneously when evaluating the influence of residual stress on fatigue performance. In the present paper, the influences of residual shear and normal stresses on the fatigue life and stress intensity factor (SIF) of turned Inconel 718 were investigated. Firstly, the cos α measurement method was utilized to calculate the residual shear stress and residual normal stress of turned Inconel 718. Then, the combined effects of residual shear and normal stresses on fatigue life were evaluated through uniaxial tension–tension fatigue tests. Thirdly, a prediction model for the SIF was proposed by taking the residual shear and normal stresses into account. Finally, the predicted SIF was validated by the published experimental data from the literature. The predicted results of the proposed model generally agreed well with the available experimental data.

show abstract

Section: Workpiece Materials and Specimen Preparationmentioning

confidence: 99%

Section: Workpiece Materials and Specimen Preparationmentioning

confidence: 99%

Section: Fatigue Testsmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Machining Induced Residual Shear and Normal Stresses on Fatigue Life and Stress Intensity Factor of Inconel 718

Hua

Wang

2019

Applied Sciences

Self Cite

View full text Add to dashboard Cite

show abstract

“…More importantly, the electrolyte solution is under relatively static condition. Therefore, liquid contacts the exposed surfaces without the wall shear stress, which could be regarded as an external load, and when it coincides with the existing residual stresses on the surfaces, corrosion consequently occurs easily and intensely. As a result, owing to the small magnitudes and the absence of wall shear stress, the fact that the sample M2 is superior in anticorrosion is observed and the conclusion that surface residual stresses marginally affect the surface corrosion in comparison with work‐hardening is drawn.…”

Section: Resultsmentioning

confidence: 99%

Effect of machining‐induced surface integrity on the corrosion behavior of Al–Li alloy 2A97 in sodium chloride solution

Niu

Wang

Hua

et al. 2018

Materials & Corrosion

Self Cite

View full text Add to dashboard Cite

Al–Li alloy 2A97 is one promising alloy that could be widely used in the aerospace field to achieve weight lighting. Due to the addition of lithium element, its anticorrosion attracts widespread interest. In this study, the milled surfaces and ground‐polished surfaces of alloy 2A97 are characterized and compared from three aspects of surface integrity, namely surface roughness, residual stresses, and work‐hardening. After potentiodynamic polarization measurements that were conducted on the machined samples with different surfaces in 3.5 wt% sodium chloride solution, the corrosion parameters regarding corrosion thermodynamics and kinetics are analyzed. Experimental results reveal that the surface micro‐hardness of the milled surfaces is greater than that of the ground‐polished surfaces because of the plastic deformation induced by milling process. Work‐hardening is beneficial while increasing surface roughness is detrimental to anticorrosion of alloy 2A97, and the effect of surface residual stresses is insignificant. Moreover, the corrosion parameters and surface corrosion morphology indicate that the corrosion resistance of Al–Li alloy 2A97 underwent milling process is superior than that obtained by grinding and subsequently polishing, which could further promote the application of mechanical milling Al–Li alloy process in aerospace industry.

show abstract

“…The induced tensile stresses show that the thermal effect between cutting tool and the workpiece is more important than the mechanical work-hardening effect. The tensile residual stresses are generally generated by the majority of machining processes such as turning, milling, grinding and drilling due to the presence of the thermal effect in the cutting process [53][54][55][56][57]. The thermal residual stress mechanism can be explained by two successive steps [58]: (i) the heat of cutting process expands the surface layer and produces, in the first step, compressive stresses; (ii) in the second step, the workpiece is then cooled and contractions in the surface layer produce finally tensile residual stresses.…”

Section: Surface Integrity (I) Down-milled Surface Integritymentioning

confidence: 99%

Influences of up-milling and down-milling on surface integrity and fatigue strength of X160CrMoV12 steel

Laamouri

Ghanem

Braham

et al. 2019

Int J Adv Manuf Technol

View full text Add to dashboard Cite

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. This is an author-deposited version published in: https://sam.ensam.eu Handle ID: .http://hdl.handle.net/10985/18458 To cite this version :Adnen LAAMOURI, Farhat GHANEM, Chedly BRAHAM, Habib SIDHOM -Influences of up-milling and down-milling on surface integrity and fatigue strength of X160CrMoV12 steel Abstract This paper aims to compare the influences of the two peripheral milling modes, up-milling and down-milling, on surface integrity and fatigue strength of X160CrMoV12 high-alloy steel. The experimental investigations showed an important difference between integrity of both milled surfaces. The down-milled surface is lowly work-hardened and well finished (lower roughness), but subjected to tensile residual stresses and severely damaged by folds of metal and short micro-cracks. The up-milled surface is highly work-hardened and subjected to compressive residual stresses, but poorly finished (higher roughness) and damaged by a density of micro-cavities due to carbide extraction. The results of 3-point bending fatigue tests revealed that the fatigue limit at 2 × 10 6 cycles of the up-milled state is largely higher of about 26% in comparison with the down-milled state. The effects of surface integrity induced by each milling mode on fatigue strength were evaluated using a HCF behaviour predictive approach based on Dang Van's multiaxial criterion. The predictive results estimated that the pre-existing micro-cracks play a dominant role in the fatigue strength degradation of the down-milled surface while the other surface effects seem to be lower. On the contrary, the fatigue strength of the up-milled surface is less affected by the pre-existing micro-cavities. The detrimental roughness effect (stress concentration effect) is significantly reduced by the beneficial effects of superficial hardening and compressive residual stresses. So, this study revealed that up-milling is the more appropriate mode for a better surface integrity towards fatigue strength of X160CrMoV12 steel than the down-milling mode.

show abstract

Experimental Investigation of Principal Residual Stress and Fatigue Performance for Turned Nickel-Based Superalloy Inconel 718

Cited by 47 publications

References 30 publications

Effects of Machining Induced Residual Shear and Normal Stresses on Fatigue Life and Stress Intensity Factor of Inconel 718

Effects of Machining Induced Residual Shear and Normal Stresses on Fatigue Life and Stress Intensity Factor of Inconel 718

Effect of machining‐induced surface integrity on the corrosion behavior of Al–Li alloy 2A97 in sodium chloride solution

Influences of up-milling and down-milling on surface integrity and fatigue strength of X160CrMoV12 steel

Contact Info

Product

Resources

About