Microstructures and mechanical properties of 5 wt.% Al2Yp/Mg–Li composite

Wang, S.J.; Wu, Guoqing; Li, R.H.; Luo, Gang

doi:10.1016/j.matlet.2005.12.038

Cited by 58 publications

(33 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, Mg-Li alloys also show high specific stiffness, and high electrical and thermal conductivities. These alloys have attracted great attention due to their merits, especially in the fields of aerospace, aircraft, and weapon [1][2][3]. Despite that, poor corrosion resistance and mechanical properties of Mg-Li binary alloys limit their wide applications.…”

Section: Introductionmentioning

confidence: 99%

Study on the preparation of Mg–Li–Mn alloys by electrochemical codeposition from LiCl–KCl–MgCl2–MnCl2 molten salt

Zhang

Chen

et al. 2010

J Appl Electrochem

View full text Add to dashboard Cite

This study presents a novel electrochemical study on the codeposition of Mg, Li, and Mn on a molybdenum electrode in LiCl-KCl-MgCl 2 -MnCl 2 melts at 893 K to form different phases Mg-Li-Mn alloys. Transient electrochemical techniques such as cyclic voltammetry, chronopotentiometry, and chronoamperometry have been used in order to investigate the codeposition behavior of Mg, Li, and Mn ions. The results obtained show that the potential of Li metal deposition, after the addition of MgCl 2 and MnCl 2 , is more positive than the one of Li metal deposition before the addition. The codeposition of Mg, Li, and Mn occurs at current densities lower than -1.43 A cm -2 in LiCl-KCl-MgCl 2 (8 wt%) melts containing 2 wt% MnCl 2 . The onset potential for the codeposition of Mg, Li, and Mn is -2.100 V. a, a ? b, and b phases Mg-Li-Mn alloys with different lithium and manganese contents were obtained via galvanostatic electrolysis from LiCl-KCl melts with different concentrations of MgCl 2 and MnCl 2 . The microstructures of typical a and b phases of Mg-Li-Mn alloys were characterized by X-ray diffraction (XRD), optical microscopy (OM), and scanning electron microscopy (SEM). The analysis of energy dispersive spectrometry (EDS) and EPMA area analysis showed that the elements of Mg and Mn distribute homogeneously in the Mg-Li-Mn alloys. The results of inductively coupled plasma analysis determined that the chemical compositions of Mg-Li-Mn alloys correspond with the phase structures of XRD patterns, and lithium and manganese contents of Mg-Li-Mn alloys depend on the concentrations of MgCl 2 and MnCl 2 .

show abstract

Section: Introductionmentioning

confidence: 99%

Study on the preparation of Mg–Li–Mn alloys by electrochemical codeposition from LiCl–KCl–MgCl2–MnCl2 molten salt

Zhang

Chen

et al. 2010

J Appl Electrochem

View full text Add to dashboard Cite

show abstract

“…It is generally performed as the thermal stable phase, because of its high melting point and low thermal expansion coefficient [19] . As exhibited in Fig.…”

Section: Microstructure Evolutionmentioning

confidence: 99%

Effect of solution treatment on microstructure and hardness of rheo-forming AZ91-Y alloy

2016

View full text Add to dashboard Cite

M g-Al series alloys have been recognized as ideal materials for lightweight applications in the automotive industry with great development potential because of their low density, high specific strength and stiffness, and excellent cast-ability [1][2] . But their applications are still limited due to the intermetallic phase Mg 17 Al 12 of easy brittleness and unstable structure at elevated temperatures [3][4] . Some efforts have focused on adding some elements like Ca, Si, rare earth (RE) into the alloy matrix for generating new phases to limit the growth of β-Mg 17 Al 12 and modify its microstructure, and eventually improve the mechanical properties of Mg-Al series alloys [4][5][6][7] . Simultaneously, T6 treatment that can also achieve similar goals has attracted more attention due to its low cost and convenience. This is done by making Mg 17 Al 12 dissolved into α-Mg matrix and then precipitated once again.Semisolid metal (SSM) processing is recognized as Abstract:The microstructure and hardness of rheo-forming AZ91-Y alloy before and after solution treatment (ST) have been investigated by means of optical microscope (OM), scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and Vickers. The experimental results showed that the β-Mg 17 Al 12 phase of alloy was nearly dissolved after ST for 5 min. With the increasing of ST duration to 28 h, both the primary and secondarily solidified α-Mg grains faded away. At the same time, the alloy exhibited a much smoother surface due to the diffusion of solute atoms (Al). During ST, the thermal stable phase of Al 2 Y produced by ultrasonic vibration retained its size and morphology. As the ST duration was increased, the alloy hardness decreased sharply at first, and then gradually reached a minimum level. an outstanding technique for Mg alloys. Its advantages are compared to the conventional die casting processes, including the potential of producing near-net shape and high-integrity components, low processing temperature that resolved the problem of oxidation, and effective burning in Mg alloys processing [8] . Several works have studied the microstructure evolution of AZ91D alloy fabricated by SSM processing during heat treatment [9][10] , but few studies related to the SSM processed Mg-Al series alloys containing RE have been reported. Also, it is well known that different casting processes will result in a variation of the microstructure, which could influence dissolution and precipitation kinetics of Mg 17 Al 12 during subsequent heat treatment. In this present study, solution treatment (ST) at 410 °C was used to process a rheo-forming AZ91-Y alloy. The aim was to detail the alloy's microstructure and hardness before and after ST, and to acquire the appropriate solution duration for subsequent aging treatment. The effect of RE (Y) on kinetics of Mg 17 Al 12 dissolution and the effect of the rheo-forming technique on alloy composition homogenization were also analyzed.

show abstract

“…Comparatively, in Mg-hydroxyapatite (HA) composite, not much improvement in strength was observed, but ductility reduced significantly (Gu et al 2010). Wang et al (2006) produced Mg-Li matrix composite with 5 wt% Al 2 Y particulates by stir casting technique and identified homogenous distribution of Al 2 Y intermetallics particles in the matrix, along with a stable interface with no reaction products. Mechanical properties showed better hardness, modulus, and tensile strength, with ~42 % reduction in ductility.…”

Section: Mg Compositesmentioning

confidence: 99%

Light Metal Matrix Composites

Jayalakshmi¹,

Gupta

2015

SpringerBriefs in Materials

View full text Add to dashboard Cite

Fundamentals of metal matrix composites are overviewed. The various light metal matrix systems (particularly Al and Mg) and the different types of reinforcements used are mentioned. The various composite production methods are described. Strengthening mechanisms that define the enhancement in properties of composites are discussed. The microstructural and mechanical properties of the composites are summarized. In addition, the several disadvantages encountered in MMCs due to ceramic reinforcement addition are understood from interfacial characteristic/properties. Keywords

show abstract

Microstructures and mechanical properties of 5 wt.% Al2Yp/Mg–Li composite

Cited by 58 publications

References 14 publications

Study on the preparation of Mg–Li–Mn alloys by electrochemical codeposition from LiCl–KCl–MgCl2–MnCl2 molten salt

Study on the preparation of Mg–Li–Mn alloys by electrochemical codeposition from LiCl–KCl–MgCl2–MnCl2 molten salt

Effect of solution treatment on microstructure and hardness of rheo-forming AZ91-Y alloy

Light Metal Matrix Composites

Contact Info

Product

Resources

About