Microstructure and mechanical properties of Mg-5Li-1Al sheets prepared by accumulative roll bonding

Hou, Linrui; Wang, Tianzi; Wu, Ruizhi; Zhang, Jinghuai; Zhang, Milin; Dong, Anping; Sun, Baode; Betsofen, S. Ya.; Крит, Б. Л.

doi:10.1016/j.jmst.2017.02.005

Cited by 67 publications

(17 citation statements)

References 29 publications

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“…Some fine and discontinuous grains are also observed in figure 5(d). The same results as the ARB process on other magnesium alloys [22,23,25], more cycle numbers of ARB can make more grain refinement for LZ91 alloys.…”

Section: Resultssupporting

confidence: 55%

“…More and more crystallographic orientation can be observed because of the grain refinement effect for LZ91 sheets by ARB. Similarly, R. Wu's group observed the grain of ARBprocessed LA51 refined by selected area electron diffraction as the number of diffraction spots increases [25]. Figure 7 shows the Vickers hardness measurements of fully annealed, as received, and four ARB-processed sheets.…”

Section: Resultsmentioning

confidence: 65%

“…R. Wu's group also proposed the deformation mechanism of Mg-5Li-1Al (LA51) alloy during the ARB process. Strain hardening and grain refinement dominate the strengthening of Mg-5Li-1Al alloy [25]. Recently, the effect of rolling temperature on AZ31 alloy with ARB had been investigated for microhardness and interface bonding strength [26].…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of mechanical properties for Mg-9Li-1Zn alloy by accumulative roll bonding

Saufan

Wang

2020

Mater. Res. Express

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The microstructures and mechanical properties of LZ91 alloys by accumulative roll bonding (ARB) were firstly investigated. The results show that the cycle numbers of ARB process and preheating temperatures before ARB process have an impact on the microstructures and mechanical properties of LZ91 alloys. The microstructures of LZ91 sheets after ARB perform two main phases of α and β in the fibrous form. ARB process can drive more numbers of crystallographic planes for α and β phases in LZ91 alloys to proof the grain refinement after ARB. More cycle numbers of ARB on LZ91 sheets makes the fibrous microstructures finer and increases the mechanical properties such as hardness and ultimate tensile strength due to the mechanism of strain hardening and grain refinement.

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Section: Resultssupporting

confidence: 55%

Section: Resultsmentioning

confidence: 65%

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Enhancement of mechanical properties for Mg-9Li-1Zn alloy by accumulative roll bonding

Saufan

Wang

2020

Mater. Res. Express

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“…[ 3,4 ] In recent years, various severe plastic deformation (SPD) processes, such as equal channel angular processing (ECAP), high‐pressure torsion (HPT), and accumulative rolling bonding (ARB), have been applied to improve the mechanical properties of magnesium alloys. [ 5–7 ] Agnew et al [ 5 ] controlled the texture of the extruded AZ31 magnesium alloy through the ECAP process, and an increased fracture elongation of 45% was obtained in specific direction. Hou et al [ 6 ] conducted the six‐cycle ARB process and prepared the Mg‐5Li‐1Al alloy sheet with an average grain size of 100 nm.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Characterization and Mechanical Properties of an AM60B Magnesium Alloy Sheet Prepared by the Double‐Pass High Strain Rate Rolling with Gradient Cooling

Zhang

et al. 2020

Adv Eng Mater

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AM60B magnesium alloy sheets with excellent mechanical properties are prepared by a double‐pass high strain rate rolling (HSRR) with gradient cooling from 370 to 340 °C. A bimodal lamellar structure, consisting of fine dynamically recrystallized grains, shear bands and fine precipitates, is obtained after the second‐pass HSRR. Formation mechanisms of shear bands are studied in depth. The results show that the formation of shear bands are closely related to the high‐density intersected twin lamellae, boundaries of initial coarse grains and the extensive dynamic recrystallization (DRX), respectively. It is also clarified that the HSRR process of the coarse grained AM60B alloy is dominated in succession by the twinning deformation stage and the following shear bands flow stage. Dynamic precipitation behavior is induced in the double‐pass HSRR process. The DRX is promoted by fine precipitates, resulting in local refinement of the HSRR'ed microstructure. Moreover, the weak basal texture is obtained with peak intensity less than 10. The high‐density twins, DRX and shear bands are suggested as main causes for the basal texture weakening. An outstanding matching between tensile strength and ductility at room temperature are obtained owing to the bimodal lamellar structure and the weakened basal texture.

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“…Low density and high strength magnesium alloys have attracted more attention in the research and development due to their applications as structural metallic materials in aerospace and automotive and biomedical applications [1][2][3][4]. The high strength and weight ratio of magnesium alloys opens wide applications and found to be a candidate material to replace steel and aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Characteristics of Hydrotalcite and Mg(OH)2 Surfaces of AZ31 Alloy Accomplished via Hydrothermal Surface Modification

Dhanalakshmi¹,

Cyril²

2019

Asian J. Chem.

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In this work, the surface of AZ31-Mg alloy is modified by hydrothermal treatment in high alkali solutions to attain high corrosion resistance. A class of magnesium hydroxide family with a layer structured compound hydrotalcite [Mg6Al2CO3(OH)16•4H2O] rhombohedral phase has been formed along with hexagonal Mg(OH)2 phases on AZ31 alloy surface. The hydrotalcite and hexagonal Mg(OH)2 phases were confirmed by X-ray diffraction analysis. The modified surfaces of AZ31 alloy are examined by field emission scanning electron microscope and location specific elemental compositions are obtained by EDS analysis. The hydrotalcite and Mg(OH)2 corrosion behavior was analyzed in 3.5 % NaCl electrolyte. For comparison purpose, only hexagonal Mg(OH)2 surfaces were also prepared by hydrothermal treatment and compared the corrosion rates with the hydrotalcite surfaces. The linear polarization and electrochemical impedance spectroscopy results revealed that the hydrotalcite surfaces demonstrated more noble or positive shift on open circuit potential, corrosion current density and resistance than those of only hexagonal Mg(OH)2 and bare AZ31 alloy. The formation of layered double hydroxide of magnesium with carbonates on AZ31 alloy led the more protection and this work paves newer directions on hydrothermal surface modification of Mg alloys.

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Microstructure and mechanical properties of Mg-5Li-1Al sheets prepared by accumulative roll bonding

Cited by 67 publications

References 29 publications

Enhancement of mechanical properties for Mg-9Li-1Zn alloy by accumulative roll bonding

Enhancement of mechanical properties for Mg-9Li-1Zn alloy by accumulative roll bonding

Microstructure Characterization and Mechanical Properties of an AM60B Magnesium Alloy Sheet Prepared by the Double‐Pass High Strain Rate Rolling with Gradient Cooling

Corrosion Characteristics of Hydrotalcite and Mg(OH)2 Surfaces of AZ31 Alloy Accomplished via Hydrothermal Surface Modification

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