Influence of anodizing process on fatigue life of machined aluminium alloy

Shahzad, M. Babar; Chaussumier, Michel; Chieragatti, Rémy; Mabru, Catherine; Rézaï-Aria, Farhad

doi:10.1016/j.proeng.2010.03.110

Cited by 46 publications

(38 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Often, the wear and corrosion protection requirements of Al alloys are further enhanced by employing traditional anodizing and hard anodizing processes . However, the applications including landing gear components of aerospace sector often demand an additional property namely the fatigue resistance . The current state‐of‐art can only provide adequate wear and corrosion protection of Al alloys even when the advanced technologies such as micro arc oxidation (MAO) are deployed thereby leaving a clear space for developing the materials and processes that can simultaneously provide resistance against wear, corrosion and fatigue …”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6] However, the applications including landing gear components of aerospace sector often demand an additional property namely the fatigue resistance. 2,[7][8][9][10] The current state-ofart can only provide adequate wear and corrosion protection of Al alloys even when the advanced technologies such as micro arc oxidation (MAO) are deployed thereby leaving a clear space for developing the materials and processes that can simultaneously provide resistance against wear, corrosion and fatigue. [11][12][13] It is very well documented that the anodized, hard anodized (HA) and MAO coatings in general degrade the fatigue life (number of cycles before failure) up to 75% than that of corresponding Al alloy.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhancing the high cycle fatigue life of high strength aluminum alloys for aerospace applications

Krishna

Madhavi

Sahithi

et al. 2018

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

Hard anodized (HA) and micro arc oxidation (MAO) coatings of identical thickness were deposited on two different high strength aluminum (Al) alloys namely, 2024‐T3 and 7075‐T6. Further, as received Al alloys were also subjected to shot peening (SP) to induce subsurface compressive residual stresses followed by the MAO coating deposition (SP + MAO). The average velocity of particle‐in‐flight during the SP process was measured and utilized to calculate the kinetic energy of the peening particles. The bare and coated alloys were subjected to completely reversed stress (R = −1) rotating beam high cycle fatigue tests at five different stress levels. In addition, the bare and coated alloys were also evaluated for their tensile properties, elemental composition, phase constituents, surface, and cross‐sectional morphologies including the surface roughness (Ra, Rz) and correlated the same with the corresponding fatigue behavior. Irrespective of substrate alloy composition and stress levels investigated, the duplex SP + MAO treatment resulted in significant fatigue life enhancement over and above the fatigue life of corresponding bare (not shot peened) Al alloy, while the hard anodized and plain MAO (both without prior shot peening) continue to exhibit significant fatigue debit. Driven by the compressive residual stresses present beneath the subsurface region of SP + MAO coating interface, fractured surface examination of SP + MAO coatings clearly highlights the crack‐branching associated multiple crack deflection as the predominant operative mechanism responsible for diminishing the crack growth rate and therefore enhance the fatigue life as compared with the near linear crack extension without significant deflections leading to relative premature failure of plain MAO coated alloys.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancing the high cycle fatigue life of high strength aluminum alloys for aerospace applications

Krishna

Madhavi

Sahithi

et al. 2018

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…Anodizing is a conventional way to protect materials from corrosion. The elevated abrasion resistance and paint adhesion, the increase in adhesive bonding, and the capability to offer electrical insulation are among the extra advantages that stem from anodizing . Because of its compact internal layer, the anodic aluminum oxide layer adheres nicely with the substrate layer, which is proved to be useful for the corrosion protection.…”

Section: Introductionmentioning

confidence: 99%

“…The fatigue strength and crack propagation of several types of aluminum alloy are well documented in literature . However, the synergistic effects, between cyclic alternating mechanical loads and chemical degradation, remain still elusive.…”

Section: Introductionmentioning

confidence: 99%

A study on corrosion‐fatigue behavior of AA7075‐T651 subjected to different surface modification treatments

Michailidis

Stergioudi

Ragousis

et al. 2019

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

Two corrosive media were used (3.5 wt% NaCl aqueous solution and distilled water) to examine the corrosion‐fatigue behavior of AA 7075‐T651, subjected to various surface modifications (wire‐EDM, blasting, and anodizing). An in‐situ corrosion‐fatigue device was used to test the corrosion‐fatigue durability. The apparatus is able to generate cyclic loads within a corrosive solution. The mechanical loading is simulated with the aid of finite element method (FEM). At both corrosive environments, a prolongation of the corrosion‐fatigue life was achieved by the blasting procedure, compared with the as‐machined specimens under same conditions. Anodizing had a deleterious impact in all examined cases.

show abstract

“…[6][7][8][9][10] The surface roughness encourages the nucleation of cracks and accelerates the growth of fatigue cracks. 11 With increasing anodising time, the surface roughness is increased. 12 The EP pretreatment has been introduced to modify the anodised objects.…”

Section: Introductionmentioning

confidence: 99%

Study on electropolished/anodised aluminium foil before and after dyeing

Rezagholi¹,

Zangeneh-Madar²,

Mirjani³

et al. 2014

Surface Engineering

View full text Add to dashboard Cite

In this research, the effect of electropolishing on the surface quality of the anodised/dyed aluminium foil was investigated. For this purpose, morphology and luminosity of the anodised/ dyed foils as well as the electropolished/anodised/dyed ones were studied by optical microscopy, stereo microscopy, scanning electron microscopy, atomic force microscopy and Photoshop software. The results show that the median of Photoshop/histogram/blue colour for the electropolished/anodised/dyed foils is more than the anodised/dyed foil (169). It is also found that electropolishing pretreatment reduces average roughness R a of the anodised/dyed aluminium foils (from 11?22 to 2?30 nm).

show abstract

Influence of anodizing process on fatigue life of machined aluminium alloy

Cited by 46 publications

References 13 publications

Enhancing the high cycle fatigue life of high strength aluminum alloys for aerospace applications

Enhancing the high cycle fatigue life of high strength aluminum alloys for aerospace applications

A study on corrosion‐fatigue behavior of AA7075‐T651 subjected to different surface modification treatments

Study on electropolished/anodised aluminium foil before and after dyeing

Contact Info

Product

Resources

About