Effects of Zr and Mn additions on formation of LPSO structure and dynamic recrystallization behavior of Mg-15Gd-1Zn alloy

Rong, Wei; Zhang, Yu; Wu, Yujuan; Sun, Ming; Chen, Juan; Wang, Ying; Han, Jie; Peng, Liming; Ding, Huaixin

doi:10.1016/j.jallcom.2016.09.068

Cited by 72 publications

(9 citation statements)

References 46 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: 52%

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: 52%

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

et al. 2018

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“…Additionally, the {00. Some previous studies [11,22 ] also found the aging treatment can reduce or even eliminate the yield point in Mg alloys. It is likely due to the low number density of precipitates in the aged Mg alloys [1].…”

Section: Resultsmentioning

confidence: 88%

The origin of discontinuous yielding in Mg alloys under slip-dominated condition studied by in-situ synchrotron diffraction and elastic-viscoplastic self-consistent modeling

Chi

Zhou

et al. 2019

Materials Science and Engineering: A

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A discontinuous yielding was observed in the as-extruded Mg-7Gd-2Y-1Zn-0.6Zr (wt. %) alloy under uniaxial tension along the extrusion direction, which was eliminated by the peak-aging treatment. The deformation mechanisms of the as-extruded and peak-aged alloys were studied by in-situ synchrotron diffraction measurement and elastic-viscoplastic self-consistent (EVPSC) modeling. The in-situ synchrotron diffraction results suggest that the unpinning of basal dislocations from solute atmospheres causes the stress relaxation in the basal slip favored grains. The EVPSC modeling results indicate that the discontinuous yielding in the as-extruded alloy is associated with the interaction between basal dislocations and solute atmospheres. After peakaging treatment, the interaction between basal dislocations and solute atmospheres is weakened *Manuscript Click here to view linked References 2 due to the consumption of a number of solute atoms. Consequently, the discontinuous yielding is eliminated in the peak-aged alloy.

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“…if the SF energy decreased (Pan, Luo, Tang, Peng, & Lu, 2011;Rong et al, 2017;Yamasaki et al, 2007). According to our previous study, 14H-LPSO structures formed in the as-cast GZ60K and GZ61K alloys and then disappeared after solution treatment at 535 C for 12 hr .…”

Section: Re-zn Alloy Matrices and Sfs May Be Converted Into Lpso Strumentioning

confidence: 77%

“…SFs and LPSO structures have been reported to coexist in Mg–RE–Zn alloy matrices and SFs may be converted into LPSO structures if the SF energy decreased (Pan, Luo, Tang, Peng, & Lu, ; Rong et al, ; Yamasaki et al, ). According to our previous study, 14H‐LPSO structures formed in the as‐cast GZ60K and GZ61K alloys and then disappeared after solution treatment at 535°C for 12 hr (Zhang, Ba, Wang, & Xue, ).…”

Section: Discussionmentioning

confidence: 99%

Corrosion behavior and mechanical degradation of as‐extruded Mg–Gd–Zn–Zr alloys for orthopedic application

et al. 2019

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The microstructures, corrosion behavior, and mechanical degradation of the as‐extruded Mg–6.0Gd–0.5Zn–0.4Zr (wt %, GZ60K) and Mg–6.0Gd–1.0Zn–0.4Zr (wt %, GZ61K) alloys were investigated. In both alloys, stacking faults and precipitates are formed in the recrystallized microstructures. The corrosion rate of GZ61K calculated by the hydrogen evolution in simulated body fluid is 0.34 ± 0.13 mm/year, which is lower than that of GZ60K (0.45 ± 0.09 mm/year); and the current density of GZ61K (5.23 ± 1.41 μA cm−2) is much lower than that of GZ60K (11.95 ± 3.37 μA cm−2). The corrosion results indicate GZ61K is more resistant to corrosion than GZ60K, but GZ60K presents more uniform corrosion mode as compared to GZ61K. After immersion in simulated body fluid for 7, 14, and 21 days, a slight decrease in the strength of both alloys is observed. The yield strength half‐life is assessed for mechanical degradation and determined to be 125 and 85 days for GZ60K and GZ61K, respectively. The as‐extruded GZ60K alloy with more uniform corrosion and longer mechanical integrity shows promising potential for orthopedic application.

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Effects of Zr and Mn additions on formation of LPSO structure and dynamic recrystallization behavior of Mg-15Gd-1Zn alloy

Cited by 72 publications

References 46 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

The origin of discontinuous yielding in Mg alloys under slip-dominated condition studied by in-situ synchrotron diffraction and elastic-viscoplastic self-consistent modeling

Corrosion behavior and mechanical degradation of as‐extruded Mg–Gd–Zn–Zr alloys for orthopedic application

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