Role of machining defects and residual stress on the AISI 304 fatigue crack nucleation

Yahyaoui, Houda; Moussa, Naoufel Ben; Braham, C.; Fredj, Nabil Ben; Sidhom, Habib

doi:10.1111/ffe.12243

Cited by 18 publications

(1 citation statement)

References 21 publications

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“…It is observed that machining process generates tensile residual stress distribution in the transverse direction (360 MPa), whereas the axial residual stress fields are compressive (-394 MPa). These stresses are generated by the thermal and mechanical effects that take place at the material-tool interfaces during the material removal by turning process [28].…”

Section: Residual Stressmentioning

confidence: 99%

Improvement of the corrosion behavior of AISI 304L stainless steel by deep rolling treatment under cryogenic cooling

Gharbi

Moussa

Rhouma

et al. 2021

Int J Adv Manuf Technol

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The effects of deep rolling parameters; particularly, work speed and cooling conditions (dry and cryogenic) on the surface integrity of AISI 304L machined samples and their further impact on uniform and localized corrosion behavior in chloride environment were experimentally investigated in this work. The electrochemical behavior of machined and deep rolled samples was assessed using cyclic potentiodynamic polarization tests in synthetic seawater. Findings of this study exhibit that grain refinement generated in the surface layers leads to improved corrosion behavior of deep rolled specimens with regard to machining state. In addition, machined samples deep rolled at a speed of 25 m/min, without cooling, showed better corrosion resistance than those processed under cryogenic cooling. However, the application of cryogenic deep rolling at speeds of 75 m/min and 120 m/min significantly enhanced the electrochemical behavior of mechanically treated specimens. It was found that the corrosion behavior of AISI 304L deep rolled components is related to combined factors (surface roughness, strain-induced martensite, microhardness, residual stress). Despite of high amounts of strain-induced martensite that can deteriorate the electrochemical behavior, it was shown that deep rolled specimens under cryogenic cooling with low surface roughness depict better uniform and localized corrosion resistances.

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Section: Residual Stressmentioning

confidence: 99%