Corrosion-Fatigue Performance of Hard Anodized and MAO-Coated 2024-T3 and 7075-T6 Aerospace Al Alloys

被引：5
作者：
Madhavi, Y. [1 ,2 ]
Krishna, Rama L. [1 ]
Narasaiah, N. [1 ]
机构：
[1] Int Adv Res Ctr Powder Met & New Mat ARCI, Ctr Engn Coatings, Hyderabad, India
[2] Natl Inst Technol NIT, Met & Mat Engn, Warangal, Andhra Pradesh, India
来源：
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 2021年 / 74卷 / 09期
关键词：
Plasma electrolytic oxidation; Impedance; Polarization; High cycle fatigue; Shot peening; Micro-arc oxidation; MICRO ARC OXIDATION; ALUMINUM-ALLOY; PEO TREATMENT; COATINGS; BEHAVIOR; LIFE;
D O I：
10.1007/s12666-021-02313-7
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
In the present study, micro-arc oxidation (MAO) coatings were deposited on shot peened high-strength aerospace aluminium alloys namely 2024-T3 and 7075-T6. The comparative corrosion-fatigue performance was evaluated in 3.5 wt.% NaCl corrosion environment for bare, hard anodized and SP + MAO (prior shot-peened and MAO) coated Al alloys. Also, the corrosion behavior of bare and SP + MAO coated Al alloys was assessed through potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) tests. In addition, SP + MAO coatings were characterized for the phase composition, surface/cross-sectional morphologies and surface roughness. Furthermore, the corrosion-fatigue fractured features of coatings were examined to understand the failure mechanisms. The SP + MAO coatings deposited on Al alloys possess superior corrosion-fatigue life as compared to the bare and hard anodized conditions.
引用
收藏
页码：2231 / 2243
页数：13
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共 37 条
  • [11] Influence of prior shot peening variables on the fatigue life of micro arc oxidation coated 6061-T6 Al alloy
    Krishna, L. Rama
    Madhavi, Y.
    Sahithi, T.
    Wasekar, Nitin P.
    Chavan, Naveen M.
    Rao, D. Srinivasa
    [J]. INTERNATIONAL JOURNAL OF FATIGUE, 2018, 106 : 165 - 174
  • [12] The influence of phase gradient within the micro arc oxidation (MAO) coatings on mechanical and tribological behaviors
    Krishna, L. Rama
    Gupta, P. S. V. N. B.
    Sundararajan, G.
    [J]. SURFACE & COATINGS TECHNOLOGY, 2015, 269 : 54 - 63
  • [13] Enhancing the high cycle fatigue life of high strength aluminum alloys for aerospace applications
    Krishna, Lingamaneni Rama
    Madhavi, Yarlagadda
    Sahithi, Thatipamula
    Rao, Dameracharla Srinivasa
    Ijeri, Vijaykumar Sharanappa
    Prakash, Om
    Gaydos, Stephen Paul
    [J]. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 2019, 42 (03) : 698 - 709
  • [14] The effect of oxide coatings on fatigue properties of 7475-T6 aluminium alloy
    Lonyuk, B.
    Apachitei, I.
    Duszczyk, J.
    [J]. SURFACE & COATINGS TECHNOLOGY, 2007, 201 (21) : 8688 - 8694
  • [15] DETERMINATION OF CORROSION RATES BY ELECTROCHEMICAL DC AND AC METHODS
    LORENZ, WJ
    MANSFELD, F
    [J]. CORROSION SCIENCE, 1981, 21 (9-10) : 647 - 672
  • [16] Influence of surface-roughness on the corrosion-fatigue behavior of MAO coated 6061-T6 Al alloy assessed in NaCl medium
    Madhavi, Y.
    Narasaiah, N.
    Jyothirmayi, A.
    Krishna, L. Rama
    [J]. SURFACE & COATINGS TECHNOLOGY, 2021, 414
  • [17] Corrosion-fatigue behavior of micro-arc oxidation coated 6061-T6 Al alloy
    Madhavi, Y.
    Krishna, L. Rama
    Narasaiah, N.
    [J]. INTERNATIONAL JOURNAL OF FATIGUE, 2021, 142
  • [18] Influence of micro arc oxidation coating thickness and prior shot peening on the fatigue behavior of 6061-T6 Al alloy
    Madhavi, Y.
    Krishna, L. Rama
    Narasaiah, N.
    [J]. INTERNATIONAL JOURNAL OF FATIGUE, 2019, 126 : 297 - 305
  • [19] An investigation into the mechanical and tribological properties of plasma electrolytic oxidation and hard-anodized coatings on 6082 aluminum alloy
    Malayoglu, Ugur
    Tekin, Kadir C.
    Malayoglu, Ufuk
    Shrestha, Suman
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2011, 528 (24): : 7451 - 7460
  • [20] Diagnostics of an electrolytic microarc process for aluminium alloy oxidation
    Mécuson, F
    Czerwiec, I
    Belmonte, T
    Dujardin, L
    Viola, A
    Henrion, G
    [J]. SURFACE & COATINGS TECHNOLOGY, 2005, 200 (1-4) : 804 - 808
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