Effects of aging treatment and peripheral coarse grain on the exfoliation corrosion behaviour of 2024 aluminium alloy using SR-CT

Published on May 1, 2020in Journal of materials research and technology5.289
· DOI :10.1016/J.JMRT.2020.01.069
Shuangqing Sun12
Estimated H-index: 12
(China University of Petroleum),
Yi Fang1
Estimated H-index: 1
(China University of Petroleum)
+ 2 AuthorsSongqing Hu15
Estimated H-index: 15
(China University of Petroleum)
Abstract The exfoliation corrosion behaviour of 2024 aluminium alloy was investigated through exfoliation corrosion test, together with synchrotron radiation X-ray computed tomography (SR-CT) to achieve the 3D segmentation of precipitated phases, cracks and corrosion products. The results demonstrate that aging treatment has a significant effect on the distribution of the precipitated phases in the 2024-T4 aluminium alloy, and the precipitated phases continuously distributed along the grain boundary would lead to intergranular corrosion (IGC) which is easily evolved into exfoliation corrosion. In the 2024-T2 aluminium alloy, the longest crack was found to locate at the boundary between the inner grains structure and outer peripheral coarse grain (PCG) structure, which indicates that the corrosion is attributed to electrochemical property difference of two structures.
📖 Papers frequently viewed together
2 Citations
#1Tyler Stannard (ASU: Arizona State University)H-Index: 7
#2Jason Williams (ASU: Arizona State University)H-Index: 32
Last. Nikhilesh ChawlaH-Index: 64
view all 6 authors...
Abstract Corrosion fatigue crack initiation and growth from corrosion pits in 7075 aluminium alloys was observed in situ using 3D x-ray synchrotron tomography. Peak-aged Al 7075 was corroded by soaking in 3.5 wt.% NaCl solution, then fatigue tested in situ in the solution using synchrotron X-ray tomography to analyse the corrosion fatigue crack initiation and growth from the pits. Hydrogen bubbles were observed within the intergranular corrosion fatigue cracks, indicating chemical changes in the...
25 CitationsSource
#1Xianghan Lu (Beihang University)H-Index: 2
#2Xiaolei HanH-Index: 1
Last. T.T Zhou (Beihang University)H-Index: 5
view all 7 authors...
Abstract In this work, the effect of microstructure on exfoliation corrosion (EXCO) resistance in an Al-Zn-Mg alloy were investigated using standard EXCO test, together with detailed microstructural examinations mainly by scanning electron microscopy (SEM) and high-angle annular detector dark-field scanning transmission electron microscopy (HAADF-STEM). An EXCO product model was built based on morphologies of EXCO product on longitudinal section and cross section for further measurement and anal...
22 CitationsSource
#1Fan Zhang (KTH: Royal Institute of Technology)H-Index: 26
#2Jonas Evertsson (Lund University)H-Index: 9
Last. Jinshan Pan (KTH: Royal Institute of Technology)H-Index: 44
view all 8 authors...
Anodization of aluminum alloys AA 6082 and AA 7075 was investigated in-situ with integrated electrochemical and synchrotron-based X-ray reflectivity (XRR) methods providing complementary information about the anodic processes taking place on the alloys. The stepwise potentiostatic polarization measurements reveal dynamic processes of the anodic oxide formation and dissolution, and the following electrochemical impedance spectroscopy measurements detect the break of the native oxide and the growt...
15 CitationsSource
#1Liuqun XieH-Index: 2
#2Qian LeiH-Index: 21
Last. Zhou LiH-Index: 26
view all 5 authors...
Al–Zn–Mg–Cu–Zr alloys are very important aeronautical materials because of their low density, high strength, and high ductility. Corrosion failure is a significant factor causing aviation accidents, which should be investigated to develop an aeronautical material but has not been done yet. In this work, the effects of aging mechanisms on the exfoliation corrosion behavior of a spray deposited Al–Zn–Mg–Cu–Zr alloy were investigated. Natural aging (NA), single-stage aging (SA), and retrogression a...
12 CitationsSource
#1Z. Zeng (Argonne National Laboratory)H-Index: 2
#2Ken Natesan (Argonne National Laboratory)H-Index: 9
Last. David L. Rink (Argonne National Laboratory)H-Index: 1
view all 4 authors...
The long-term corrosion of Fe-based alloys in simulated oxy-fuel environment at 1023 K (750 °C) was studied. Detailed results are presented on weight change, scale thickness, internal penetration, microstructural characteristics of the corrosion products, and the cracking of scales for the alloys after exposure at 1023 K (750 °C) for up to 3600 hours. An incubation period during which the corrosion rate was low was observed for the alloys. After the incubation period, the corrosion accelerated, ...
3 CitationsSource
#1Sebastien Dezecot (INSA Lyon: Institut national des sciences Appliquées de Lyon)H-Index: 3
#2Vincent Maurel (ENSMP: Mines ParisTech)H-Index: 11
Last. Alain Köster (ENSMP: Mines ParisTech)H-Index: 13
view all 5 authors...
Abstract Synchrotron X-ray tomography was used to monitor damage evolution in three dimensions during in situ Low Cycle Fatigue (LCF) tests at high temperature (250 °C) for an industrial material. The studied material is an AlSi7Cu3Mg aluminum alloy (close to ASTM A319) produced by Lost Foam Casting (LFC), a process which generates coarse microstructures but is nevertheless used for engine parts by the automotive industry. The volume analysis (3D images) has shown that cracks are extremely sensi...
62 CitationsSource
#1Zhenjun Yang (Coventry University)H-Index: 32
#2Wenyuan Ren (NWAFU: Northwest A&F University)H-Index: 7
Last. Thomas James Marrow (University of Oxford)H-Index: 33
view all 7 authors...
Abstract In-situ micro X-ray Computed Tomography (XCT) tests of concrete cubes under progressive compressive loading were carried out to study 3D fracture evolution. Both direct segmentation of the tomography and digital volume correlation (DVC) mapping of the displacement field were used to characterise the fracture evolution. Realistic XCT-image based finite element (FE) models under periodic boundaries were built for asymptotic homogenisation of elastic properties of the concrete cube with Yo...
94 CitationsSource
#1Ali Reza Eivani (IUST: Iran University of Science and Technology)H-Index: 20
#2Jie Zhou (TU Delft: Delft University of Technology)H-Index: 47
Last. Jurek Duszczyk (TU Delft: Delft University of Technology)H-Index: 45
view all 3 authors...
AbstractMicrostructural evolution leading to peripheral coarse grain (PCG) structure in hot extruded Al-4.5Zn-1Mg rods is investigated. The extent of dynamic recrystallization (DRX) in the as-extruded product falls not in line with the basis over which the existing mechanisms for interpretation of PCG formation are built. A new mechanism is therefore proposed based on partial DRX during extrusion and nucleation and abnormal growth of statically recrsystallised grains.
9 CitationsSource
#1Yong-Cheng Lin (CSU: Central South University)H-Index: 58
#2Guan Liu (CSU: Central South University)H-Index: 9
Last. Jia Li (CSU: Central South University)H-Index: 3
view all 7 authors...
Abstract Two-stage stress-aging experiments of an Al–Cu–Mg alloy were performed over wide range of external stress. The effects of external stress on corrosion resistance of the two-stage stress-aged Al–Cu–Mg alloy are investigated by cyclic potentiodynamic polarization experiments, electrochemical impedance spectroscopy (EIS) tests, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. It is found that the external stress significantly affects corrosion resis...
17 CitationsSource
#1Sudhanshu S. Singh (ASU: Arizona State University)H-Index: 19
#2Jason Williams (ASU: Arizona State University)H-Index: 32
Last. Nikhilesh Chawla (ASU: Arizona State University)H-Index: 64
view all 6 authors...
In situ X-ray synchrotron tomography was used to measure the localized corrosion rate of Mg2Si particles present in 7075 aluminum alloys in deionized ultra-filtered (DIUF) water. The evolution of hydrogen bubbles was captured as a function of time and the measured volume was used to calculate the local corrosion rate of Mg2Si particles. It was shown that in the absence of chloride ions, stress was needed to create fresh particle surfaces, either by fracture or debonding, to initiate corrosion at...
31 CitationsSource
Cited By5
#1Qing Tian (Huizhou University)
#2Qiumei Yang (CSU: Central South University)H-Index: 1
Last. Xu-Hao Zhu (CSU: Central South University)
view all 5 authors...
In this paper, the effects of an aging treatment on the corrosion resistance/mechanism of a tensile deformed Al-Cu-Mn-Fe-Zr alloy are investigated. The impedance magnitude and polarization resistance increase, while the corrosion current decreases with the increased aging time and temperature. The discontinuously-distributed precipitates and precipitation-free zone, which can cut the corrosion channels, appear at grain boundaries when the temperature is relatively high and the aging time is rela...
#1S.H. Mousavi Anijdan (IUST: Iran University of Science and Technology)H-Index: 19
#2D. Sadeghi-Nezhad (IAU: Islamic Azad University)H-Index: 1
Last. Ali Reza Eivani (IUST: Iran University of Science and Technology)H-Index: 20
view all 8 authors...
Abstract It is known that parameters such as deformation together with the temperature and time of aging heat treatment, play critical roles in changing the mechanical properties and the microstructure of AA2024 aluminum alloy. It is shown that a superior level of strength is achievable by applying cold deformation at an appropriate combination of temperature and time. In the present study, the effect of cold deformation on the various properties of artificially aged AA2024 aluminum alloy was as...
This study experimentally investigates the influence of adding SiC on microstructure and mechanical properties of the aluminium alloys welded joints. The SiC particles have been directly added into a zone of friction stir welding (FSW) to make (AA6061–AA2024) SiC composites material. Results show that the effect of adding SiC particles on microstructure refines the grain size in the stir zone by preventing its growth during FSW process. The adding of SiC particles has a significant effect on the...
#1Pan Yi (USTB: University of Science and Technology Beijing)H-Index: 10
#2Chaofang Dong (USTB: University of Science and Technology Beijing)H-Index: 37
Last. Xiaogang Li (USTB: University of Science and Technology Beijing)H-Index: 71
view all 4 authors...
Abstract This work studies the corrosion behavior of β-Sn and intermetallic compounds (IMCs) in Sn96.5Ag3.0Cu0.5 (SAC305) alloy through micro-structure observation, in-situ electrochemical technique and first-principles calculation. The results show that corrosion behavior of SAC305 is affected by galvanic corrosion, electronic structure and material microstructure. The Volta potential difference between Cu6Sn5, Ag3Sn and Sn is up to 234 and 174 mV. The length percentage of high angle grain boun...
1 CitationsSource
#1Uzair Sajjad (NCTU: National Chiao Tung University)H-Index: 10
#2Aqeel Abbas (NTU: National Taiwan University)H-Index: 4
Last. Chi-Chuan Wang (NCTU: National Chiao Tung University)H-Index: 1
view all 6 authors...
Abstract The aim of this study is to investigate the effect of roughness fabrication methods on the corrosion resistance of Al-5050 alloy. The surfaces having roughness (0.45 to 6.2 μm) are generated by polishing, machining, and sandblasting. The surfaces are tested in 3.5wt%NaCl aqua solution with the voltage from -0.2 to 1.0 V with a scan rate of 0.1mv/s. Tafel curves are plotted to determine the corrosion current density (Icorr) and the corrosion potential (Ecorr). In addition to this, corros...
3 CitationsSource