Effects of 1.5 wt% samarium (Sm) addition on microstructures and tensile properties of a Mg−6.0Zn−0.5Zr alloy

Guan, Kai; Li, Baishun; Yang, Qiang; Qiu, Xin; Tian, Zheng; Zhang, Dongdong; Zhang, Deping; Niu, Xiaodong; Sun, Wei; Liu, Xiaojuan; Meng, Jian

doi:10.1016/j.jallcom.2017.11.315

Cited by 55 publications

(14 citation statements)

References 59 publications

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“…Some researchers reported that the addition of samarium (Sm) to magnesium alloys could refine the grain and enhance mechanical properties [6][7][8][9][10] . The Smcontaining AZ31, AZ61, AZ91 and AZ92 alloys formed a new Al 2 Sm compound, resulting in a reduction in the area fraction of the β-Mg 17 Al 12 phase.…”

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confidence: 99%

Microstructure and mechanical properties of AZ91 magnesium alloy with minor additions of Sm, Si and Ca elements

Bonnah

Hai

2019

China Foundry

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confidence: 99%

Microstructure and mechanical properties of AZ91 magnesium alloy with minor additions of Sm, Si and Ca elements

Bonnah

Hai

2019

China Foundry

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“…Various conventional and severe plastic deformation (SPD) techniques were used in recent years to develop high strength Mg alloys. Figure 2(B) shows a comparison of YS vs. ELON of various high strength Mg alloys [6][7][8][9][10][11][12][13][14][15][21][22][23][24][25][26][44][45][46][47][48][49][50] processed by different conventional and SPD techniques with UFG E675 alloy. The YS-ELON combination obtained for UFG E675 alloy (Figure 2(B)) is highest among all the Mg alloys produced by any technique.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Achieving extraordinary structural efficiency in a wrought magnesium rare earth alloy

Panigrahi

Mishra

Brennan

et al. 2020

Materials Research Letters

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The opportunities for wrought magnesium products in a wide range of structural and functional materials for transportation, energy generation, energy storage and propulsion are increasing due to their light-weighting benefits, high specific strength and ease of recyclability. However, the current uses of wrought magnesium alloys for structural applications are limited due to comparatively low strength, high yield strength asymmetry and poor formability & superplasticity. In the present work, we developed an ultrafine-grained magnesium alloy with an extraordinary strength and ductility combination, exceptional high specific strength, zero yield strength asymmetry and excellent high strain rate superplasticity. IMPACT STATEMENTWe have developed friction stir processed UFG microstructure in a rare-earth containing magnesium alloy and achieved exceptional strength-ductility combination along with no yield asymmetry and extraordinary high strain rate superplasticity.

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“…Most magnesium applications presently used in the automotive industry are high-pressure die cast (HPDC), and have relatively good strengths and high ductility at room temperature. Applications of HPDC magnesium alloys, such as front end support assemblies, steering wheel armatures and steering column support brackets [1], [2], have not only complex shapes but also cross sections with various thicknesses. Very often, under normal die casting conditions, thick sections have a higher tendency to solidification shrinkage and porosity caused by inclusion of gas than thin walls.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, Tensile Properties and Fracture Behavior of HPDC Magnesium Alloy AZ91

Sun¹,

Geng²,

Ren³

et al. 2020

IJMMM

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Understanding of tensile and fracture behaviours of die cast magnesium alloys is of importance for proper design of various emerging automotive applications. In the present study, magnesium alloy AZ91 was high pressure die cast into rectangular coupons with section thicknesses of 2, 6 and 10 mm. The effect of section thicknesses on strain-hardening and fracture behaviours of the die cast AZ91 was investigated. The results of tensile testing indicate that the ultimate tensile strength (UTS), yield strength (YS), elongation (ef), modulus, toughnrss and resilience decrease to 129.17, 110.59 MPa, 0.37%, 25.9 GPa, 0.89 MJ/m 3 , and 236.10 kJ/m 3 from 245.54, 169.26 MPa, 4.07%, 37.8 GPa, 8.34 MJ/m 3 , and 378.95 kJ/m 3 with increasing section thicknesses of die cast AZ91 to 10 mm from 2 mm, respectively. The analysis of true stress vs. strain curves shows that the straining hardening rates during the plastic deformation of the alloy increase to 5500 MPa from 4600 MPa with decreasing the section thickness to 2 mm from 10 mm, respectively. The microstructure analyses by the optical microscopy (OM) and scanning electron microscopy (SEM) reveal that the high tensile properties should be attributed the low porosity level, fine dendrite structure, high eutectic content, and thick skin. The observation via SEM fractography illustrates that the fracture behaviour of die cast AZ91 is influenced by section thicknesses. As the section thickness increases, the fracture of AZ91 tends to transit from ductile to brittle mode due to arising porosity content and coarsening microstructure. Index Terms-Magnesium alloy AZ91, high pressure die casting, tensile and fracture behaviors, microstructure.

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Effects of 1.5 wt% samarium (Sm) addition on microstructures and tensile properties of a Mg−6.0Zn−0.5Zr alloy

Cited by 55 publications

References 59 publications

Microstructure and mechanical properties of AZ91 magnesium alloy with minor additions of Sm, Si and Ca elements

Microstructure and mechanical properties of AZ91 magnesium alloy with minor additions of Sm, Si and Ca elements

Achieving extraordinary structural efficiency in a wrought magnesium rare earth alloy

Microstructure, Tensile Properties and Fracture Behavior of HPDC Magnesium Alloy AZ91

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