Microstructure, mechanical properties and stress corrosion cracking of Al–Zn–Mg–Zr alloy sheet with trace amount of Sc

Huang, Xing; Pan, Qing‐Jiang; Li, Bo; Liu, Zhiming; Huang, Zaiwang; Yin, Zhi-min

doi:10.1016/j.jallcom.2015.08.011

Cited by 48 publications

(12 citation statements)

References 55 publications

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“…It has also been found that there are precipitation-free zones (PFZ) in the vicinity of grain boundaries ( Figure 4 c). This microstructure is characteristic for Al–Zn–Mg alloys subjected to heat treatment [ 25 , 26 , 27 ]. Deschamps et al [ 9 ] found that the critical factor shaping the microstructure of Al–Zn–Mg–Zr alloys, in addition to degradation and morphology of the Al 3 Zr phase, is also the volume fraction of GP zones, because they are privileged nucleation areas of the η’ phase.…”

Section: Resultsmentioning

confidence: 99%

“…This results in growth and coagulation of precipitates at the boundaries and their distribution in large intervals between them. The precipitation-free zone is also reduced [ 25 , 26 , 27 , 35 ].…”

Section: Resultsmentioning

confidence: 99%

“…Successively, comprehensive considerations on the effect of variant heat treatment of Al–Zn–Mg–Cu (7085) alloy on microstructure and mechanical properties, and, in particular, resistance to intercrystalline and stress corrosion, were the subject of research led by Peng et al [ 26 ]. The effect of precipitation hardening parameters on microstructure of an Al–Zn–Mg–Sc–Zr alloy, which in turn determines stress corrosion resistance, was undertaken by Huang et al [ 27 ]. Sun et al [ 28 ] conducted research on the dependence of grain boundary structure and stress corrosion of an Al–Zn–Mg alloy without Cu and microadditions.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure, Mechanical Properties, and Corrosion Resistance of Thermomechanically Processed AlZn6Mg0.8Zr Alloy

et al. 2018

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The paper presents results of the investigations on the effect of low-temperature thermomechanical treatment (LTTT) on the microstructure of AlZn6Mg0.8Zr alloy (7000 series) and its mechanical properties as well as electrochemical and stress corrosion resistance. For comparison of the LTTT effect, the alloy was subjected to conventional precipitation hardening. Comparative studies were conducted in the fields of metallographic examinations and static tensile tests. It was found that mechanical properties after the LTTT were better in comparison to after conventional heat treatment (CHT). The tested alloy after low-temperature thermomechanical treatment with increasing plastic deformation shows decreased electrochemical corrosion resistance during potentiodynamic tests. The alloy after low-temperature thermomechanical treatment with deformation degree in the range of 10 to 30% is characterized by a high resistance to stress corrosion specified by the level of PSCC indices.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructure, Mechanical Properties, and Corrosion Resistance of Thermomechanically Processed AlZn6Mg0.8Zr Alloy

et al. 2018

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“…It was confirmed that Sc addition can significantly improve strength and SCC resistance of 7xxx series alloys [16][17][18][19][20][21][22]. For example, Kannan et al [17] reported the addition of Sc into 7010 Al alloys could introduce a large number of nanosized Al 3 (Sc, Zr) phases to strengthen the alloy and inhibit recrystallization, at the same time, SCC susceptibility of the alloy in neutral 3.5% NaCl solution was reduced.…”

Section: Introductionmentioning

confidence: 91%

Influence of Scandium Addition on Stress Corrosion Cracking Susceptibility of Al-Zn-Mg Alloy in Different Corrosive Environments

Jiang

Yan

et al. 2018

Metals

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Stress corrosion cracking (SCC) susceptibilities of Al-Zn-Mg alloys without and with Scandium addition were evaluated in 3.5% NaCl solution at different pH and different strain rate, using slow strain rate test technique. The results indicate that Sc addition reduces grain size and width of precipitation free zones, and transforms grain boundary precipitates from continuous distribution into interrupted distribution by inhibiting recrystallization. In solution at pH 1, pH 3 and pH 7, Sc addition reduces the degree of localized corrosion of alloy surface and SCC susceptibility of Al-Zn-Mg alloy. However, in solution at pH 10 and pH 12, grain refinement significantly promotes the diffusion of hydrogen atoms into matrix, thus Sc addition increases SCC susceptibility of Al-Zn-Mg alloy. Under different strain rate conditions, Sc addition can all reduce SCC susceptibility of Al-Zn-Mg alloy in solution at pH 1, pH 3 and pH 7, and can all increase SCC susceptibility of Al-Zn-Mg alloy in solution at pH 10 and pH 12. As a result, Sc modified Al-Zn-Mg alloy in practical applications should be avoided in alkaline environments.

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“…AA7075. Applying intermediate artificial ageing followed by paint bake and (or) curing thermal cycles would significantly reduce the time required for artificial aging, from 48 hours to less than 2 hours, which could save energy significantly and enhance productivity [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Determination of Processing Windows for the Hot Stamping of AA7075

Zhang

Fakir

et al. 2016

KEM

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Abstract. Hot stamping of aluminium alloys is a tailored forming process, with the assigned processing windows determining the quality of each hot stamped component in terms of its post-form strength. In this work, a processing window calculator, 'Tailor', was developed in order to define the optimal processing parameters that should be used in a production line to successfully produce a component with the desired post-form strength using hot stamping. 'Tailor' was developed using the results of forming tests, air-cooling tests and multi-stage artificial ageing tests, which provided guidance on the values for the die closing force, transfer time and artificial ageing time to be used in the hot stamping process. The effectiveness of 'Tailor' was demonstrated in two case studies.

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Microstructure, mechanical properties and stress corrosion cracking of Al–Zn–Mg–Zr alloy sheet with trace amount of Sc

Cited by 48 publications

References 55 publications

Microstructure, Mechanical Properties, and Corrosion Resistance of Thermomechanically Processed AlZn6Mg0.8Zr Alloy

Microstructure, Mechanical Properties, and Corrosion Resistance of Thermomechanically Processed AlZn6Mg0.8Zr Alloy

Influence of Scandium Addition on Stress Corrosion Cracking Susceptibility of Al-Zn-Mg Alloy in Different Corrosive Environments

Determination of Processing Windows for the Hot Stamping of AA7075

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