Evaluating the morphology of precipitates and the room temperature mechanical properties of age hardened AZT802 magnesium alloy treated at different aging temperature

Jiang, Luyao; Fan, Xinjian; Guo, Fei; Hu, Guozhong; Xue, Haitao; Pan, Fusheng

doi:10.1016/j.msea.2015.07.051

Cited by 12 publications

(3 citation statements)

References 30 publications

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“…In addition, the coarsening of precipitated phases was observed after ageing, which may increase the tendency of stress concentration on the grain boundaries and phase boundaries. This could possibly increase the probability of initiation and propagation of crack and flaws [ 19 , 20 ] and result in a relatively variable failure strength.…”

Section: Resultsmentioning

confidence: 99%

Statistical Analysis on the Mechanical Properties of Magnesium Alloys

et al. 2017

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Knowledge of statistical characteristics of mechanical properties is very important for the practical application of structural materials. Unfortunately, the scatter characteristics of magnesium alloys for mechanical performance remain poorly understood until now. In this study, the mechanical reliability of magnesium alloys is systematically estimated using Weibull statistical analysis. Interestingly, the Weibull modulus, m, of strength for magnesium alloys is as high as that for aluminum and steels, confirming the very high reliability of magnesium alloys. The high predictability in the tensile strength of magnesium alloys represents the capability of preventing catastrophic premature failure during service, which is essential for safety and reliability assessment.

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Section: Resultsmentioning

confidence: 99%

Statistical Analysis on the Mechanical Properties of Magnesium Alloys

et al. 2017

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“…In general, the change in the hardness values under different ageing conditions should be determined by the evolution of precipitated particles3740. In the research of ageing behavior of Mg-Li-Zn alloy, Li et al .…”

Section: Resultsmentioning

confidence: 99%

“…It is commonly accepted that mechanical strength is positive proportional to the hardness value of the alloys40. Figure 7 shows the tensile stress-strain curves of two alloys before and after ageing treatment for 35 days.…”

Section: Resultsmentioning

confidence: 99%

Natural ageing responses of duplex structured Mg-Li based alloys

Wang

et al. 2017

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Natural ageing responses of duplex structured Mg-6%Li and Mg-6%Li-6%Zn-1.2%Y alloys have been investigated. Microstructural analyses revealed that the precipitation and coarsening process of α-Mg particles could occur in β-Li phases of both two alloys during ageing process. Since a certain amount of Mg atoms in β-Li phases were consumed for the precipitation of abundant tiny MgLiZn particles, the size of α-Mg precipitates in Mg-6%Li-6%Zn-1.2%Y alloy was relatively smaller than that in Mg-6%Li alloy. Micro hardness measurements demonstrated that with the ageing time increasing, the α-Mg phases in Mg-6%Li alloy could have a constant hardness value of 41 HV, but the contained β-Li phases exhibited a slight age-softening response. Compared with the Mg-6%Li alloy, the age-softening response of β-Li phases in Mg-6%Li-6%Zn-1.2%Y alloy was much more profound. Meanwhile, a normal age-hardening response of α-Mg phases was maintained. Tensile results indicated that obvious ageing-softening phenomenon in terms of macro tensile strength occurred in both two alloys. Failure analysis demonstrated that for the Mg-6%Li alloy, cracks were preferentially initiated at α-Mg/β-Li interfaces. For the Mg-6%Li-6%Zn-1.2%Y alloy, cracks occurred at both α-Mg/β-Li interfaces and slip bands in α-Mg and β-Li phases.

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