Journal ArticleDOI
The effect of surface contamination on corrosion performance of ultrasonic shot peened 7150 Al alloy
TLDR
In this paper, a surface contamination layer was induced on AA 7150 surface during ultrasonic shot peening (USSP) treatment and its exfoliation evolution in solution containing HCl was investigated using immersion test, electrochemical impedance spectra (EIS), scanning kelvin probe force microscopy (SKPFM), SEM with energydispersive X-ray spectroscopy, XRD and TEM.Abstract:
Surface contamination layer mainly containing Fe, Ti and O with a thickness of ~ 20 μm was induced on AA 7150 surface during ultrasonic shot peening (USSP) treatment. The contaminated layer and its exfoliation evolution in solution containing HCl was investigated using immersion test, electrochemical impedance spectra (EIS), scanning kelvin probe force microscopy (SKPFM), SEM with energy-dispersive X-ray spectroscopy, XRD and TEM. USSPed AA 7150 with contamination layer showed ~ 3 times higher corrosion rate than that of controlled sample. However, after the exfoliation of the contamination layer, the corrosion rate of USSPed alloy actually is lower than that of its untreated counterpart. Additionally, as revealed by SKPFM, surface contamination layer is cathodic relative to the substrate, indicating that surface contamination layer is detrimental for the substrate alloy when galvanic corrosion occurs. Nonetheless, it should be noted that even in the presence of contamination layer, the localized corrosion resistance of peened alloy was greatly improved, which might be due to surface nanocrystallization, disappearance of rolled 〈220〉 texture and residual compressive stress effects caused by USSP.read more
Citations
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Journal ArticleDOI
Nanomaterials by severe plastic deformation: review of historical developments and recent advances
Kaveh Edalati,Andrea Bachmaier,Victor A. Beloshenko,Yan Beygelzimer,V.D. Blank,Walter José Botta,Krzysztof Bryła,J. Čížek,Sergiy V. Divinski,Nariman A. Enikeev,Yuri Estrin,Ghader Faraji,Roberto B. Figueiredo,Masayoshi Fuji,Tadahiko Furuta,Thierry Grosdidier,Jenő Gubicza,Anton Hohenwarter,Zenji Horita,Jacques Huot,Yoshifumi Ikoma,Miloš Janeček,Megumi Kawasaki,Petr Král,Shigeru Kuramoto,Terence G. Langdon,Daniel Rodrigo Leiva,Valery I. Levitas,Andrei A. Mazilkin,Masaki Mito,Hiroyuki Miyamoto,Terukazu Nishizaki,Reinhard Pippan,Vladimir V. Popov,Elena N. Popova,Gencaga Purcek,Oliver Renk,Ádám Révész,G. Sauvage,Vaclav Sklenicka,Werner Skrotzki,Boris B. Straumal,Satyam Suwas,Laszlo S. Toth,Nobuhiro Tsuji,Ruslan Z. Valiev,Gerhard Wilde,Michael J. Zehetbauer,Xinkun Zhu +48 more
TL;DR: In this paper , the authors comprehensively review recent advances on development of ultrafine-grained and nanostructured materials by severe plastic deformation and provide a brief history regarding the progress of this field.
Journal ArticleDOI
Localized corrosion behaviour of AA7150 after ultrasonic shot peening: Corrosion depth vs. impact energy
TL;DR: In this paper, the effect of impact energy on localized corrosion behavior of ultrasonic shot peened AA 7150 was systematically studied by manipulating peening parameters such as peening duration, peening amplitude, and peening distance.
Journal ArticleDOI
Improvement in tribological behavior of commercial pure titanium (CP-Ti) by surface mechanical attrition treatment (SMAT)
TL;DR: In this paper, surface mechanical attrition treatment (SMAT) was applied to commercial pure titanium (CP-Ti) samples under different durations in order to improve surface properties and produce an ultrafine grain layer.
Journal ArticleDOI
Influence of ultrasonic rolling on surface integrity and corrosion fatigue behavior of 7B50-T7751 aluminum alloy
TL;DR: In this article, the surface integrity and corrosion fatigue performance of the 7B50-T7751 aluminum alloy treated by one (UR1), three (UR3), and six passes (UR6) of ultrasonic surface rolling process (USRP) were investigated.
Journal ArticleDOI
A comparison of AA2024 and AA7150 subjected to ultrasonic shot peening: Microstructure, surface segregation and corrosion
TL;DR: In this paper, the influence of ultrasonic shot peening on microstructure, surface segregation, localized and electrochemical corrosion of AA2024 was investigated using immersion test, OCP, EIS, polarization, XRD and SEM-EDS methods.
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