Author
Bong Sun You
Other affiliations: Hebei University of Technology
Bio: Bong Sun You is an academic researcher from Korea University of Science and Technology. The author has contributed to research in topics: Alloy & Magnesium alloy. The author has an hindex of 33, co-authored 112 publications receiving 3028 citations. Previous affiliations of Bong Sun You include Hebei University of Technology.
Papers published on a yearly basis
Papers
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TL;DR: In this paper, the effect of Zn concentration on the corrosion behavior of Mg-xZn alloys was investigated and the microstructure was observed by scanning electron microscopy (SEM).
259 citations
01 Jan 2013-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the effects of cerium (Ce) addition on the microstructure and mechanical properties of ZK60 alloy were investigated using SEM, EBSD, and TEM.
Abstract: The effects of cerium (Ce) addition on the microstructure and mechanical properties of ZK60 alloy were investigated using SEM, EBSD, and TEM and by performing tensile tests of indirect-extruded ZK60 alloys with 0.5, 1.0, and 1.5 wt% Ce contents. The variation of hot workability due to Ce addition was also investigated by establishing processing maps of these alloys. The results revealed that Ce addition had an obvious influence, reducing the average grain size and weakening the basal fiber texture of the as-extruded ZK60 alloys; these changes were attributed to the promotion of dynamic recrystallization (DRX) by particle stimulated nucleation (PSN) at Mg–Zn–Ce particles. The yield and tensile strengths were improved by the Ce addition, while the elongation was decreased due to the hard Mg–Zn–Ce particles. It was also found that the hot workability improves up to the addition of 1.0 wt% Ce and then deteriorates.
152 citations
TL;DR: The role of second phases in the corrosion behavior of Mg-5Zn alloy was investigated in this article, where the dimension of the MgxZny second phases is only some hundred nanometers.
143 citations
26 Mar 2014-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the effects of extrusion parameters on the microstructure and tensile properties of Mg-2Zn-0.5Gd alloys were investigated by conducting indirect extrusion at different temperatures, ram speeds, and extrusion ratios.
Abstract: The effects of extrusion parameters on the microstructure and tensile properties of the Mg–2Zn–0.5Ce, Mg–1Zn–1Mn–0.5Ce, and Mg–2Zn–1.5Gd alloys were investigated by conducting indirect extrusion at different temperatures, ram speeds, and extrusion ratios. All of the extruded alloys exhibited a bimodal grain structure composed of equiaxed fine recrystallized (DRXed) grains and elongated coarse unDRXed grains, except for some alloys extruded at a high temperature and a fast speed. With an increase in the temperature, speed, and ratio of extrusion, the average size and area fraction of the DRXed grains increased as a result of the temperature rise at the deformation zone caused by deformation heating. The yield strength increased with a decrease in the size of the DRXed grains according to the Hall–Petch relation, while the elongation increased with an increase in the fraction of the DRXed grains due to the suppression of {10−11}–{10−12} double twinning, irrespective of alloy composition. Due to these relationships between the microstructural characteristics and tensile properties, the yield strength decreased but the elongation increased when the temperature, speed, and ratio were increased.
121 citations
TL;DR: The solute concentration of the alloying elements dissolved in a matrix, in conjunction with conventionally used factors such as the Pilling-Bedworth ratio and the Gibbs free energy change for oxidation, should be considered as an important factor influencing the ignition resistance of magnesium alloys as mentioned in this paper.
112 citations
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TL;DR: There remains growing interest in magnesium (Mg) and its alloys, as they are the lightest structural metallic materials Mg alloys have the potential to enable design of lighter engineered systems, including positive implications for reduced energy consumption as mentioned in this paper.
1,173 citations
TL;DR: In 2018 and 2019, significant progress has been achieved in high-performance cast and wrought magnesium and magnesium alloys, such as Mg ion batteries, hydrogen storage Mg materials, bio-magnesium alloys and functional magnesium materials as discussed by the authors.
744 citations
TL;DR: It was found that inclusion of alloying elements such as Al, Mn, Ca, Zn and rare earth elements provides improved corrosion resistance to Mg alloys and surface modification is a promising approach to improve the performance of Mg-based biomaterials for orthopaedic applications.
629 citations
TL;DR: A review of recent research and developments in high-strength Mg-RE alloys is beneficial for the further design of Mg alloys with higher strength as well as excellent comprehensive performance as discussed by the authors.
484 citations
TL;DR: In this paper, the authors focus on the following topics: (1) materials requirements in design of aircraft structures and engines, (2) recent advances in the development of aerospace materials, (3) challenges faced by recent aerospace materials and (4) future trends in aerospace materials.
477 citations