Dynamic microstructural changes in Mg–9Al–1Zn alloy during hot compression

Xu, S.W.; Matsumoto, N.; Kamado, Shigeharu; Honma, T.; Kojima, Yo

doi:10.1016/j.scriptamat.2009.03.051

Cited by 114 publications

(43 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fine ␤ particles distributed at the newly-formed dynamically recrystallized grain boundaries confirms the previous research results [17][18][19][20][21]. In addition, Xu et al [23] also confirmed that the size and morphology of ␤ phase depend on temperature rather than on strain rate. In other words, by decreasing in temperature, not only the amount of fine ␤ phase precipitates at the vicinity of primary grains increase but also the mechanism of grain boundary pinning becomes dominant.…”

Section: Resultssupporting

confidence: 87%

“…[22]. The results of studies by Xu et al [23] also indicated that recrystallized grains only formed at the vicinity of individual ␤ precipitates and primary grain boundaries. Therefore, fine ␤ precipitates contribute in pinning recrystallized grain boundaries and restricting their growth, leading to reduction of recrystallized grain size [22,23].…”

Section: Resultsmentioning

confidence: 92%

See 1 more Smart Citation

Effect of thermomechanical parameters on dynamically recrystallized grain size of AZ91 magnesium alloy

Ebrahimi

Maldar

Ebrahimi

et al. 2011

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 92%

Effect of thermomechanical parameters on dynamically recrystallized grain size of AZ91 magnesium alloy

Ebrahimi

Maldar

Ebrahimi

et al. 2011

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…1(b). EDX analysis indicates that the phase is laminar ¢-Mg 17 Al 12 . A statistical measurement suggests that the mean area fraction of Mg 17 Al 12 in the specimen is about 13.6%.…”

Section: Resultsmentioning

confidence: 95%

“…On one hand, the pinning effect of the Mg 17 Al 12 phase can greatly retard the growth of the DRXed grains. On the other hand, the newly formed grain boundaries provide an ideal position for the precipitation of Mg 17 Al 12 phase. Yet the interaction between these two aspects is complicated.…”

Section: Resultsmentioning

confidence: 99%

Microstructure Evolution of AZ80 Magnesium Alloy during Multi-Directional Forging Process

Zhu¹,

Li²,

Zhang³

et al. 2014

Mater. Trans.

View full text Add to dashboard Cite

Grain refinement of a magnesium alloy, AZ80, was studied in multi-directional forging (MDF) with decreasing temperatures from 683 to 573 K. The MDF was carried out up to accumulative true strains of around 7 with changing the loading direction from pass to pass. The structural changes are characterized by the alternate appearance of fine dynamic recrystallized (DRXed) grains (with many dynamic granular Mg 17 Al 12 phases) and coarse DRXed grains (without Mg 17 Al 12 phases) in the sample, the expansion of the fine grains area, and the refinement of (DRXed) grains in the fine grains area during the MDF process. The non-uniform dynamic precipitation of the Mg 17 Al 12 phase may attribute to the inhomogenous Al content distribution in the Mg matrix. These Mg 17 Al 12 phase retards the growth of the DRX grains, which in turn results in the formation and the expansion of the fine grains area during the MDF process with decreasing temperature.

show abstract

“…It can be seen that with the heating temperature increasing the peak intensity of β-Mg 17 Al 12 decreases gradually, meaning that the content decreases. Figure 3 shows the typical morphology of β-Mg 17 Al 12 and it can be seen that β-Mg 17 Al 12 mainly distribute along the grain boundaries (Figure 3a) with the typical morphologies of lamellar β-Mg 17 Al 12 distributes around the bulk β-Mg 17 Al 12 precipitates (Figure 3b) [14][15][16]. It should be underlined that no obvious β-Mg 17 Al 12 phases were observed in traditional AZ31 magnesium foams [17][18][19], and the reasons will be discussed in Section 4.…”

Section: Mechanical Property Testmentioning

confidence: 99%

Temperature-Time Superposition Effect on Compressive Properties of AZ31B Magnesium Composite Foams

Xia

Wang

Peng

et al. 2018

Metals

View full text Add to dashboard Cite

Magnesium composite foams with 10 vol. % of hollow ceramic microspheres (CMs) were prepared by modified melt foaming method. Specimens with homogeneous pore structures were subjected to various heating temperature (150, 250, 320, 400, and 500 • C, respectively) and enduring times (1, 2, 4, 6, and 24 h, respectively). Evolution of microstructure and mechanical properties of the samples, before and after the heating processes were examined by applying X-ray diffraction technique (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and quasi-static uniaxial compression test. The results showed that as heating temperature and enduring time increasing, β-Mg 17 Al 12 phases gradually dissolved, resulting in a solid-solution strengthening effect. Meanwhile, internal stress relaxation in the matrix leads to the decrease of yield strength and micro hardness of the specimens. When compared with the unheated foams, the treated specimens possessed lower micro-hardness, yield strength, and energy absorption capacity due to the dissolution of β-Mg 17 Al 12 phases and the release of internal stress. However, higher strain hardening exponents for almost all of the treated composite foams were observed and the reasons were discussed. It is proposed that more factors should be taken into account when using heated composite foams in practical applications.

show abstract

Dynamic microstructural changes in Mg–9Al–1Zn alloy during hot compression

Cited by 114 publications

References 10 publications

Effect of thermomechanical parameters on dynamically recrystallized grain size of AZ91 magnesium alloy

Effect of thermomechanical parameters on dynamically recrystallized grain size of AZ91 magnesium alloy

Microstructure Evolution of AZ80 Magnesium Alloy during Multi-Directional Forging Process

Temperature-Time Superposition Effect on Compressive Properties of AZ31B Magnesium Composite Foams

Contact Info

Product

Resources

About