Fracture behavior of AZ91 magnesium alloy

Lu, Yao; Wang, Q.D; Ding, Wenjiang; Zeng, Xiaoqin; Zhu, Yanping

doi:10.1016/s0167-577x(00)00041-0

Cited by 175 publications

(25 citation statements)

References 8 publications

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“…The viscosity of molten systems often dictates the castability (or ability to fill a mold cavity) of many metals and their alloys. [1] Furthermore, the mechanisms of solidification often require knowledge of the viscosity of the melt. [2,3] Surface tension is a significant property in atomization and granulation studies for the powder metallurgy industry, because the efficiency of these processes is directly related to the surface tension of the melt.…”

Section: Introductionmentioning

confidence: 99%

A new method to dynamically measure the surface tension, viscosity, and density of melts

Roach

Henein

2005

Metall Mater Trans B

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A new formulation has been developed to describe the fluid dynamics of a liquid draining through an orifice under the influence of gravity. The model relates experimental quantities of head and flow rate, with surface tension, viscosity, and density, facilitating the calculation of all three properties. Experiments performed with molten aluminum at temperatures from 937 to 1173 K indicate that surface tension (N/m) and density (kg/m 3 ) are [0.871 Ϫ 0.155 ϫ 10 Ϫ3 (T Ϫ T liq )] and [2390 Ϫ 0.15 (T Ϫ T liq )], which is within 6.5 and 2.5 pct, respectively, of values reported in the literature. The viscosity has been determined to be 5.2 ϫ 10 Ϫ4 Nsm Ϫ2 , which is significantly less than data reported from other sources. The method is unique because the measurements are performed under highly dynamic conditions.

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Section: Introductionmentioning

confidence: 99%

A new method to dynamically measure the surface tension, viscosity, and density of melts

Roach

Henein

2005

Metall Mater Trans B

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“…structure) and Mg 17 Al 12 (b.c.c. structure), leading to the deterioration of mechanical properties [14,35,36]. However, when alloys are subjected to some heat treatment, coarse β-Mg 17 Al 12 precipitates distribute along the grain boundaries could be transformed to fine continuous precipitates that distributed in grains, resulting in the enhancement of mechanical properties [14].…”

Section: Discussionmentioning

confidence: 99%

Temperature-Time Superposition Effect on Compressive Properties of AZ31B Magnesium Composite Foams

Xia

Wang

Peng

et al. 2018

Metals

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Magnesium composite foams with 10 vol. % of hollow ceramic microspheres (CMs) were prepared by modified melt foaming method. Specimens with homogeneous pore structures were subjected to various heating temperature (150, 250, 320, 400, and 500 • C, respectively) and enduring times (1, 2, 4, 6, and 24 h, respectively). Evolution of microstructure and mechanical properties of the samples, before and after the heating processes were examined by applying X-ray diffraction technique (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and quasi-static uniaxial compression test. The results showed that as heating temperature and enduring time increasing, β-Mg 17 Al 12 phases gradually dissolved, resulting in a solid-solution strengthening effect. Meanwhile, internal stress relaxation in the matrix leads to the decrease of yield strength and micro hardness of the specimens. When compared with the unheated foams, the treated specimens possessed lower micro-hardness, yield strength, and energy absorption capacity due to the dissolution of β-Mg 17 Al 12 phases and the release of internal stress. However, higher strain hardening exponents for almost all of the treated composite foams were observed and the reasons were discussed. It is proposed that more factors should be taken into account when using heated composite foams in practical applications.

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“…Magnesium alloys have great potential for applications in automotive, aerospace, and 3C industries, due to low density, dimension stability, non-pollution, high specific strength, and specific stiffness [1]. What is more, it has been reported that magnesium alloys also have excellent anti-vibration, thermal conductivity, electromagnetic shielding characteristic, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, many investigations have been done on Mg-Al, Mg-RE (RE is rare earth) and Mg-Zn alloys. Mg 17 Al 12 phase should be the common strengthening phase in the Mg-Al alloys, which, however, are still limited at elevated temperatures [1]. RE elements have often been added into magnesium alloys to improve the mechanical properties, especially at elevated temperatures [4].…”

Section: Introductionmentioning

confidence: 99%

Microstructure evolution and mechanical properties of the Mg-7Zn-(xY-0.6Zr (x = 6, 9, 12 wt.%) alloys

ZHANG¹,

YIN²,

LIU³

et al. 2017

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Mg-7Zn-xY-0.6Zr (x = 6, 9, 12 wt.%) alloys have been designed to investigate the effects of Y content on the microstructure and mechanical properties. The results show that Y content plays a key role in the phase composition and mechanical properties of the investigated Mg-7Zn-xY-0.6Zr alloys. With the Y content increasing from 6 to 12 %, the phase composition transformed from α-Mg + W-phase (Mg3Y2Zn3) to α-Mg + X-phase (Mg12YZn). The amount of X-phase increases rapidly, and W-phase decreases accordingly. Furthermore, the W-phase distributes alternatively with the X-phase, due to the specific local Y/Zn mole ratio at the final solidifying stage. After extrusion, the phase composition and corresponding volume fraction have great influence on mechanical properties. The X-phase is in favour of high strength and the W-phase makes for good plasticity. The as-extruded Mg-7Zn-12Y-0.6Zr alloy establishes the highest strength with an ultimate tensile and yield tensile strength of 416 MPa and 302 MPa, respectively. K e y w o r d s : Mg-Zn-Y-Zr, extrusion, casting and solidification, microstructures, mechanical properties

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Fracture behavior of AZ91 magnesium alloy

Cited by 175 publications

References 8 publications

A new method to dynamically measure the surface tension, viscosity, and density of melts

A new method to dynamically measure the surface tension, viscosity, and density of melts

Temperature-Time Superposition Effect on Compressive Properties of AZ31B Magnesium Composite Foams

Microstructure evolution and mechanical properties of the Mg-7Zn-(xY-0.6Zr (x = 6, 9, 12 wt.%) alloys

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