S‐N‐P curves in 7075 T7351 and 2024 T3 aluminium alloys subjected to surface treatments

Monsalve, Alberto; Páez, M.; Toledano, Mar; Artigas, Alfredo; Sepulveda, Y.; Valencia, Y N.

doi:10.1111/j.1460-2695.2007.01134.x

Cited by 27 publications

(21 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the difference of fatigue life between PEO coating and PEO with impregnation epoxy resin was to be caused by the difference of fatigue crack initiation life. Moreover, the difference of fatigue life and influence factors (except the surface hardness without discussion) between hard anodized coating and PEO coating on the aluminum alloys had been described in previous literature by Yerokhin et al (1999Yerokhin et al ( , 2004Yerokhin et al ( , 2005, Lonyuk et al (2007), Nykyforchyn et al (1998), Sheasby and Pinner (2001), Rateick et al (1996), Asquith et al (2006), Khan et al (2005), Dieter and Bacon (1988), Monsalv et al (2007), and Rajasekaran, Raman, Krishna, Joshi, and Sundararajan (2008). The synergistic effects of oxide coating and aluminum substrates attracted a wide variety of study by means of choosing different processing parameters in the anodized coating process.…”

Section: Effects Of Surface Modification On the Fatigue Strength Of Amentioning

confidence: 90%

Environment-induced fatigue cracking behavior of aluminum alloys and modification methods

Wang

Li²,

Yang

et al. 2015

Corrosion Reviews

View full text Add to dashboard Cite

This paper reviews the current corrosion fatigue strength issues of light metals, which include the corrosion fatigue cracking behaviors, such as the prior-corrosion pit deformation mechanism, the synergistic interaction between prior-corrosion pits and local stress/strain, the coupling damage behavior under mechanical fatigue loading, and the surrounding environmental factors such as a high humidity and a current 3.5 wt.% or 5.0 wt.% NaCl aqueous solution. The characterization of corrosion fatigue crack growth rate based on simple and measurable parameters (crack propagation length and applied stress amplitude or stress intensity factor) is also of great concern in engineering application. In addition, an empirical model to predict S-N curves of aluminum alloys at the environmental conditions was proposed in this paper. One of the main aims was to outline the corrosion fatigue cracking mechanism, which favors the corrosion fatigue residual life prediction of aluminum alloys subjected to the different environmental media that are often encountered in engineering services. Subsequently, this paper explores recently various surface modification technologies to enhance corrosion fatigue resistance and to improve fatigue strength. For example, the fatigue strength of 2024-T4 aluminum alloy has been modified using plasma electrolytic oxidation coating with the impregnation of epoxy resin modification method to compare with other oxide coating or uncoated substrate alloy.

show abstract

Section: Effects Of Surface Modification On the Fatigue Strength Of Amentioning

confidence: 90%

Environment-induced fatigue cracking behavior of aluminum alloys and modification methods

Wang

Li²,

Yang

et al. 2015

Corrosion Reviews

View full text Add to dashboard Cite

show abstract

“…A typical feature of anodising-induced pre-damage, which is present in all coatings, is the formation of microvoids. These flaws, which are often referred to as "irregularities", form in the early stages of the anodising process when the Alrich matrix around large primary phase particles dissolves [19,21,22]. Irrespective of the substrate material, they have approximately the same size of 2-3 lm in all four coatings.…”

Section: Characterisation Of Substrate and Coatingsmentioning

confidence: 96%

The effect of anodic oxide coating on the fatigue behaviour of AA6082 with an ultrafine‐grained microstructure

Hockauf¹,

Köhler²,

Händel³

et al. 2011

Materialwissenschaft Werkst

View full text Add to dashboard Cite

In this work, the high-cycle fatigue behaviour of the precipitation hardening aluminium wrought alloy AA6082 was investigated for a conventionally-grained and an ultrafine-grained substrate condition, with each a hard and a soft electrolytic anodic oxide (EAO) coating. The investigations were focused on the susceptibility of the coatings to anodising-and fatigueinduced cracking of the coatings and its impact on the fatigue life. For both substrate materials, the fatigue strength of the coated specimens was significantly reduced compared to the uncoated materials. Considering the resistance to crack initiation in the coating, the soft-anodised coatings were found to be superior compared to the hard-anodised ones. Moreover, the coatings on the ultrafine-grained substrate showed an enhanced resistance to anodisinginduced as well as fatigue-induced cracking. However, it is supposed that the lower resistance to crack transition from the coating into the substrate is one of the most important factors which strongly limits the fatigue life of the EAO-coated specimens. This might be the reason why the fatigue strength of the ultrafine-grained substrates is relatively low, despite their higher resistance to crack initiation.Keywords: equal-channel angular pressing (ECAP) / electrolytic anodic oxidation (EAO) / high-cycle fatigue (HCF) / ultrafine-grained / Al-Mg-Si alloy / In dieser Arbeit wird die Ermüdungsfestigkeit der ausscheidungshärtbaren Aluminiumknetlegierung AA6082 an einen normalkörnigen sowie einem ultrafeinkörnigen Zustand mit jeweils einer hart-und einer weichanodisierten Schicht (electrolytic anodic oxiddation, EAO) untersucht. Die Untersuchungen sind darauf ausgerichtet, die Anfälligkeit der Schichten für Rissbildung, sowohl beim Anodisierprozess als auch bei der Ermüdungsbelastung, zu untersuchen und Verbindungen zur Ermüdungsfestigkeit herzustellen. Für beide Substratmaterialien ergibt sich für die beschichteten Zustände eine deutliche Verschlechterung der Ermüdungsfestigkeit. Dabei zeigen sich die hartanodisierten Schichten generell als deutlich rissanfälliger im Vergleich zu den weichanodisierten Schichten. Darüber hinaus kann im Vergleich der Substratzustände festgestellt werden, dass beide Schichttypen auf dem ultrafeinkörnigen Substrat einen erhöhten Widerstand gegen eine anodisierprozessbedingte oder ermüdungsbedingte Anrissbildung besitzen. Die Untersuchungen zeigen jedoch auch, dass vor allem der Widerstand gegen einen Übergang des Risses von der Schicht ins Substrat die Lebensdauer bestimmt. Für die beschichteten ultrafeinkörnigen Substrate könnte hier der Grund für deren relativ niedrige Ermüdungsfestigkeit liegen, die sich trotz des erhöhten Widerstandes gegen Anrissbildung ergibt.Schlüsselwörter: equal-channel angular pressing (ECAP) / elektrolytisch anodische Oxidation (EAO) / ultrafeinkörnig / Ermüdungsfestigkeit / Al-Mg-Si-Legierung /

show abstract

“…In particular with aluminium alloys, anodic oxidation processes are employed to improve and retain the surface finish [3], but these also have a significantly negative influence on the bulk fatigue properties [4]. The development of thicker, harder ceramic coatings on aluminium such as by plasma-electrolytic oxidation (PEO) has provided improved wear characteristics but the problem of fatigue strength deficit still remains [5,6].…”

Section: Introductionmentioning

confidence: 99%

Effect of combined shot-peening and PEO treatment on fatigue life of 2024 Al alloy

et al. 2006

View full text Add to dashboard Cite

S‐N‐P curves in 7075 T7351 and 2024 T3 aluminium alloys subjected to surface treatments

Cited by 27 publications

References 18 publications

Environment-induced fatigue cracking behavior of aluminum alloys and modification methods

Environment-induced fatigue cracking behavior of aluminum alloys and modification methods

The effect of anodic oxide coating on the fatigue behaviour of AA6082 with an ultrafine‐grained microstructure

Effect of combined shot-peening and PEO treatment on fatigue life of 2024 Al alloy

Contact Info

Product

Resources

About