Effect of ZRB2-modified on microstructure and mechanical properties of Mg-Zn-Y-Mn alloy

Zhang, Zhe; Zhang, Yatong; Zhang, Jinshan; Li, Yi; Ma, Yunzhu; Xu, Chunxiang

doi:10.1016/j.jma.2018.05.009

Cited by 9 publications

(2 citation statements)

References 25 publications

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“…Crack initiation by second phases [43] or other microstructural features refer back to their brittleness and high hardness. Research on Mg-Zn-Y-Mn shows higher nanohardness (at an applied load of 5 mN) of the blocky LPSO phases compared to the Mg-matrix, which will explain their brittleness [44]. Individual microhardness measurements (applied load 100 N) on Mg-Gd-Y-Zn-Zr [45] also show a higher hardness of blocky LPSO phases.…”

Section: Introductionmentioning

confidence: 89%

Crack Propagation in As-Extruded and Heat-Treated Mg-Dy-Nd-Zn-Zr Alloy Explained by the Effect of LPSO Structures and Their Micro- and Nanohardness

et al. 2021

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The investigation of the crack propagation in as-extruded and heat-treated Mg-Dy-Nd-Zn-Zr alloy with a focus on the interaction of long-period stacking-ordered (LPSO) structures is the aim of this study. Solution heat treatment on a hot extruded Mg-Dy-Nd-Zn-Zr (RESOLOY®) was done to change the initial fine-grained microstructure, consisting of grain boundary blocky LPSO and lamellar LPSO structures within the matrix, into coarser grains of less lamellar and blocky LPSO phases. C-ring compression tests in Ringer solution were used to cause a fracture. Crack initiation and propagation is influenced by twin boundaries and LPSO lamellae. The blocky LPSO phases also clearly hinder crack growth, by increasing the energy to pass either through the phase or along its interface. The microstructural features were characterized by micro- and nanohardness as well as the amount and location of LPSO phases in dependence on the heat treatment condition. By applying nanoindentation, blocky LPSO phases show a higher hardness than the grains with or without lamellar LPSO phases and their hardness decreases with heat treatment time. On the other hand, the matrix increases in hardness by solid solution strengthening. The microstructure consisting of a good balance of grain size, matrix and blocky LPSO phases and twins shows the highest fracture energy.

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Section: Introductionmentioning

confidence: 89%

Crack Propagation in As-Extruded and Heat-Treated Mg-Dy-Nd-Zn-Zr Alloy Explained by the Effect of LPSO Structures and Their Micro- and Nanohardness

et al. 2021

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“…The microstructure of the alloy was further observed by scanning electron microscope(SEM) (APREOC), and the composition of intermetallic phases in the alloy was analyzed by energy dispersive spectrometer (EDS).The volume fraction of the intermetallic phase in the alloy and the number density of the possible effective nucleating particles inside the grains were calculated by using point recording method. It was reported that under the same temperature gradient, the microstructure of the alloy is closely related to heterogeneous nucleation [23]. More heterogeneous nucleation occurs in the melt, stronger grain separation and more free grains are expected.…”

Section: Experimental Methodsmentioning

confidence: 99%

Synergistic effects of Y and Nd on grain refinement of Mg-Y-Nd-Al alloy

Zhao

Wang

et al. 2022

Mater. Res. Express

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In this study, the synergistic effects of Y and Nd on the grain refinement of the as-cast Mg-Y-Nd-Al alloy was investigated by varying Y and Nd contents while fixing their total content (Y + Nd) at 7%. When the contents of Y and Nd were 3% and 4%, respectively, the refinement was most effective and the smallest grain size of 49±5 μm was achieved. The grain refinement process was primarily controlled by the heterogeneous nucleation and the growth restriction factor (Q value). Y could only form Al2RE phase with Al, while both Al2RE and Al11RE3 were formed between Nb and Al. The Al2RE phase acted as nucleation particles of α-Mg and facilitated heterogeneous nucleation; however, Al11RE3 was an unfavorable phase for heterogeneous nucleation. When the Y content was less than 3%, the quantity of Al2RE phase increased when more Y was available, which resulted in more active nucleation particles and better refinement. When the Y content exceeded 3%, the Q value (growth limiting factor) of the alloy decreased, while the quantity of Al2RE phase remained unchanged. This would lead to a decreased number of active nucleation particles and a less effective grain refinement.

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Effect of LPSO Phases on Crack Propagation in an Extruded Mg–Dy–Nd–Zn–Zr Alloy Influenced by Heat Treatment

Maier

Clausius

Richter

et al. 2021

The Minerals, Metals &Amp; Materials Series

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Effect of ZRB2-modified on microstructure and mechanical properties of Mg-Zn-Y-Mn alloy

Cited by 9 publications

References 25 publications

Crack Propagation in As-Extruded and Heat-Treated Mg-Dy-Nd-Zn-Zr Alloy Explained by the Effect of LPSO Structures and Their Micro- and Nanohardness

Crack Propagation in As-Extruded and Heat-Treated Mg-Dy-Nd-Zn-Zr Alloy Explained by the Effect of LPSO Structures and Their Micro- and Nanohardness

Synergistic effects of Y and Nd on grain refinement of Mg-Y-Nd-Al alloy

Effect of LPSO Phases on Crack Propagation in an Extruded Mg–Dy–Nd–Zn–Zr Alloy Influenced by Heat Treatment

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