AISI 4140 Steel Fatigue Performance: Cd Replacement by Electroplated Zn-Ni Alloy Coating

Autor(es)

Ferreira Fernandes, Martin ; dos Santos, Jefferson Rodrigo Marcelino ; de Oliveira Velloso, Veronica Mara ; Voorwald, Herman Jacobus Cornelis

• Tipo de documento: Artigo Científico
• Fonte: Journal of Materials Engineering and Performance; v. 29, n. 3, p. 12-pg., 2020-02-21.

Resumo

The fatigue behavior of electrodeposited Zn-Ni alloy coating was investigated for its suitability to replace Cd coatings in AISI 4140 steel studs applied in oil and gas industries due to environmental and human health considerations. Axial fatigue tests were carried out at room temperature and statistically analyzed through two-parameter Weibull distribution. The coatings characterization included chemical composition and corrosion resistance analysis through energy-dispersive spectroscopy and salt spray tests, respectively. Furthermore, the fracture surfaces were observed using scanning electron microscopy, and the stress gradient in studs was obtained through finite element analysis. The experimental results showed that the notch sensibility was higher for high-cycle fatigue regime, varying from 0.20 to 0.61 for 10(4) and 10(5) cycles, respectively. The stress concentration effect influenced the fatigue life of the component, especially for low-stress levels, decreasing the fatigue strength in about 9% for 10(4) cycles and more than 20% for 10(5) cycles. The experimental fatigue data showed an increase in axial fatigue strength of about 8% for 10(5) cycles for electrodeposited Zn-Ni coating specimens, indicating feasibility with respect to fatigue behavior of the substitution of electrodeposited Cd for a Zn-Ni alloy. (AU)

• Processo FAPESP: 17/05619-0 - Análise do comportamento em fadiga do recobrimento de uma liga zinco-níquel como substituição ao cádmio eletrodepositado para o aço AISI 4140
• Beneficiário: Martin Ferreira Fernandes
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 19/02125-1 - Estudo da influência do revestimento nanoestruturado Cr/CrN e do efeito dwell no comportamento em fadiga da liga Ti-6Al-4V na temperatura de 350°C
• Beneficiário: Martin Ferreira Fernandes
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto