Precipitation hardening of an Mg–5Zn–2Gd–0.4Zr (wt. %) alloy

Li, Jiehua; Barrirero, Jenifer; Sha, Gang; Aboulfadl, Hisham; Mücklich, Frank; Schumacher, Peter

doi:10.1016/j.actamat.2016.01.053

Cited by 76 publications

(15 citation statements)

References 40 publications

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“…As reported previously, 18,20) the addition of Zr to Mg-Gd-Zn alloys results in the formation of a ZnZr phase, and hinders the formation of LPSO structure due to causing Zn consumption. Therefore, the formation of 14 H and lamellar LPSO phases in GZ101-1Zr was suppressed, as shown in Figs.…”

Section: Resultsmentioning

confidence: 56%

“…The chemical compositions of all phases were in good agreement with those determined previously (Table 1). 9,13,18) Figure 2 shows SEM images of AE samples, revealing that extrusion-induced microstructure deformation and recrystallization were observed for both alloys. Moreover, the fractions of 14 H (0.13 vol%) and lamellar (1.55 vol%) LPSO phases decreased in as-extruded GZ101, with as-extruded GZ101-1Zr containing 0.51 vol% of the lamellar LPSO phase.…”

Section: Methodsmentioning

confidence: 99%

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Effect of Zr Addition on the Corrosion Behavior of Extruded Mg Alloys in NaCl Solution

et al. 2018

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The effect of Zr addition on the corrosion behavior of an extruded Mg-10Gd-1Zn alloy (GZ101) in 3.5 mass% NaCl solution was investigated by electrochemical and immersion tests in 3.5% NaCl solution. The addition of 1 mass% Zr to GZ101 (to afford GZ101-1Zr) decreased the fraction of 14H (number of stacking layers and H-Hexahedral structure) and lamellar long period stacking ordered (LPSO) phases across the α-Mg matrix and increased the fraction of the X-phase (Mg 12 GdZn) formed at grain boundaries. Extruded GZ101-1Zr exhibited a signi cantly smaller corrosion rate than extruded GZ101 (0.13 vs. 2.11 mm year −1 ) due to containing less 14H/lamellar LPSO phases (detrimental to corrosion resistance) and featuring a noble {1010} prismatic texture in the extrusion direction. [

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Section: Resultsmentioning

confidence: 56%

Section: Methodsmentioning

confidence: 99%

Effect of Zr Addition on the Corrosion Behavior of Extruded Mg Alloys in NaCl Solution

et al. 2018

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“…Zr addition can refine the grain size and, thereby, improve strength. [47] At the initial condition (0.5 h, Figure 7a), fine compositional oscillations were observed, which can be attributed to solute clustering of Mg, Zn, and Gd during the early stage of ageing. Other alloying elements (i.e., Gd) were added to Mg-Zn binary alloys containing Zr, with the aim to modify the precipitation microstructure and, thereby, improve the precipitation hardening.…”

Section: Precipitation Hardening Of Mg Alloysmentioning

confidence: 96%

“…Stress in a crystal lattice is related to strain through the tensorial Hooke's law. [47] with permission from Elsevier). Consequently, the energy of atomic vibrations changes, resulting in a frequency shift of the observable phonon peaks, where anharmonic parameters are used to describe the effect of strain on optical phonons.…”

Section: Ex Situ Calibration Of Shift-stress Response In Raman Spectrmentioning

confidence: 99%

Complementary High Spatial Resolution Methods in Materials Science and Engineering

Paris

Lang

et al. 2017

Adv Eng Mater

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REVIEWThis review features the potential of modern high spatial resolution methods in materials science and engineering by presenting a selection of scientific examples covering bulk materials, as well as hard coatings, semiconductors, and mesoporous thin films. Complementary techniques are employed to study microstructure and/or texture and stresses in multiphase Mo-, Al-, and Mg-base alloys, in several nitride-and boride-based hard coatings, in silicon, as well as in mesoporous silica films. Although far from being comprehensive, the chosen examples aim at underlining the importance of modern electron microscopy based methods and of scattering/diffraction techniques at large scale neutron and synchrotron radiation facilities for modern materials research. In addition, atom probe tomography, Raman scattering and atomic force microscopy are also highlighted.

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“…Mg-Zn series alloy is one of the most typical precipitation hardening Mg alloys [8][9][10]. When Zn content is about 6 wt.% (hereafter, all compositions are in weight percent unless stated otherwise), the alloy has a significant aging strengthening effect [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on Microstructure and Mechanical Properties of Mg-5Zn-1Mn Alloy Tube

Cao

et al. 2020

Metals

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The effects of heat treatment on the microstructure, mechanical properties and electrochemical property of the as-extruded Mg-5Zn-1Mn (ZM51) alloy tube are investigated by optical microstructure (OM), X-ray diffractometer (XRD), scanning electron microscopy (SEM), transmission electrical microscope (TEM), uniaxial tensile test, and electrochemical test. The results show that the as-cast structure is a typical dendritic structure, mainly composed of α-Mg and Mg7Zn3 eutectic compounds. After homogenization, most of Mg7Zn3 eutectic phases are dissolved in the Mg matrix. During the extrusion process, the ZM51 alloy has undergone complete dynamic recrystallization and has a good elongation, reaching 21.4%. T6, especially T4 + double aging treatment, can significantly improve the mechanical properties of the as-extruded tube. The microstructure reveals that the precipitation strengthening of the finely dispersed MgZn2 precipitates is the main reason for the strength increase. The fracture micromorphology of the as-extruded tube is mainly composed of dimples and cleavage facets, which is a typical ductile fracture. The fracture mode of the as-aged alloy tubes belongs to cleavage fracture. In addition, the electrochemical test results show the solution-treated ZM51 alloy tube has the best corrosion resistance. The improvement of corrosion resistance is mainly due to the microstructure uniformity and low phase volume fraction.

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Precipitation hardening of an Mg–5Zn–2Gd–0.4Zr (wt. %) alloy

Cited by 76 publications

References 40 publications

Effect of Zr Addition on the Corrosion Behavior of Extruded Mg Alloys in NaCl Solution

Effect of Zr Addition on the Corrosion Behavior of Extruded Mg Alloys in NaCl Solution

Complementary High Spatial Resolution Methods in Materials Science and Engineering

Effect of Heat Treatment on Microstructure and Mechanical Properties of Mg-5Zn-1Mn Alloy Tube

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