Enhancing mechanical properties of Mg–Sn alloys by combining addition of Ca and Zn

Pan, Hucheng; Qin, Gaowu; Xu, Ming; Fu, Hua; Ren, Yuping; Pan, Fusheng; Gao, Zhi Qiang; Zhao, Chaoyong; Yang, Qingshan; She, Jia; Song, Bo

doi:10.1016/j.matdes.2015.06.032

Cited by 124 publications

(39 citation statements)

References 51 publications

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“…46 Second, the particles with nanoscale presented in the TZA862 alloy were benefit for the higher tensile ductility by retarding the dynamic recovery and enhancing the dislocation storage capability. 3 Finally, the workhardening exponents obtained from the Hollomon equation, r 5 Ke n , are 0.61, 0.85, and 0.52 for the TZA852, TZA862, and TZA872 alloys, respectively. It is generally known that a large work-hardening exponent leads to low sensitivity to strain localization, resulting in a greater elongation.…”

Section: B Tensile Ductilitymentioning

confidence: 95%

“…[1][2][3][4] Currently, some of the best heatresistant Mg alloys, with good mechanical properties at both ambient and elevated temperatures, are those based on the Mg-RE-Zn system. 5 Many previous reports have indicated that the addition of RE elements such as Gd, La, and Y can remarkably improve the heat-resistance and high strength of Mg alloys.…”

Section: Introductionmentioning

confidence: 99%

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Microstructures and mechanical properties of as-ECAPed Mg–8Sn alloys with the combined addition of Zn and Al

et al. 2017

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A "RE-free" and I-phase-containing Mg-8Sn-based alloy system was developed and successfully fabricated through the equal channel angular pressing (ECAP) process. The influence of the Zn/Al mass ratio on the microstructures and mechanical properties of the as-ECAPed Mg-8Sn-(5,6,7) Zn-2(wt%)Al alloys was investigated using an optical microscope, an X-ray diffractometer, a scanning electron microscope, a transmission electron microscope, and a universal testing machine. Grain size, dynamic recrystallization behavior, and texture were found to be greatly affected by the Zn/Al mass ratio. Furthermore, the ultimate tensile strength (250 MPa) and elongation (14.5%) of the alloy with a Zn/Al mass ratio of 3 were considerably increased compared to those of the as-ECAPed alloys with Zn/Al ratios of 2.5 and 3.5 (ultimate tensile strength and elongation of 215 MPa and 13% and 184 MPa and 10%, respectively). This significant enhancement was attributed to extensive grain boundary strengthening, precipitation strengthening, and higher work hardening capacity as well as texture randomization. The strength and ductility of the as-ECAPed alloys are also discussed in terms of the I-phase and Mg 2 Sn formation.

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Section: B Tensile Ductilitymentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Microstructures and mechanical properties of as-ECAPed Mg–8Sn alloys with the combined addition of Zn and Al

et al. 2017

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“…Magnesium alloys have great potential of reducing vehicle weight because of their high specific strength and stiffness [1][2][3][4][5][6][7]. In the past decade, the Mg-Gd-Y-Zn based alloys containing long period stacking ordered (LPSO) structures have been shown to exhibit excellent mechanical properties, including the high tensile strength of over 500 MPa at room temperature [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…The strip LPSO phases with inter-distances of nano-meter scale can readily improve yield strength of Mg alloys via second phase strengthening mechanism of impeding dislocations movement in α-Mg matrix [3,13,14]. Besides that, effect of the bulk LPSO phase (micron-scale) on strength of Mg alloy has also been given particular attention [15,16].…”

Section: Introductionmentioning

confidence: 99%

On the microstructure and mechanical property of as-extruded Mg-Gd-Y-Zn alloy with Sr addition

Liu

Diao

Chai

et al. 2017

Materials Science and Engineering: A

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In this study, microstructure evolutions of 0.2, 0.6) alloys (named as sample 0Sr, 0.2Sr, 0.6Sr) during heat-treatment and extrusion were investigated. As-cast sample 0Sr contains typical long period stacking ordered (LPSO) phases and Mg 3 RE. With Sr addition, amounts of LPSO phases decrease and are gradually replaced by the Mg 17 Sr 2 phases. After homogenization and annealing treatment, profuse strip LPSO phases readily precipitate in grain interiors of sample 0Sr, while only Mg 17 Sr 2 and Mg 3 RE phases are detected in samples 0.2Sr and 0.6Sr. It suggests that the Sr addition would inhibit LPSO phases. After extrusion, the bimodal grain structures, the bulk and strip LPSO phases are detected in sample 0Sr, which can contribute to providing strengthening and extra strain hardening. In as-extruded sample 0.2Sr, finer recrystallized grain size, bulk Mg 17 Sr 2 and LPSO phases (micron-scale) and Mg 5 RE phase (nano-scale) are found due to the pre-annealing treatment. However, lower amounts of both nano-sized and macro-sized LPSO phases lead to the low ultimate strength (300 MPa). In sample 0.6Sr, the strip LPSO phases are readily formed even though the length and total amounts of LPSO phases decrease.More bulk Mg 17 Sr 2 phases and LPSO phases are also precipitated, which lead to the more superior yield and ultimate strengths of 0.6Sr sample under higher temperature, as compared with the 0Sr sample.2

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“…The plastic deformation modes of wrought Mg alloys depend on a combination of basal slip, non-basal slip and deformation twinning [13][14][15][16] . The basal slip is willingly to activate at room temperature because of the low CRSS [17][18][19] , which results in Mg alloy sheets show a strong (0002) basal texture after plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

Effect of Multi-Pass Bending Deformation on Microstructure Evolution and Mechanical Properties of AZ31 Alloy Sheet

Yang

Dai

et al. 2016

Mat. Res.

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The rolled AZ31 Mg alloy sheets were processed by multi-pass bending (MPB) process at room temperature and followed by annealing treatment. Mechanical properties of the as-received and MPB sheets in annealed conditions were examined based on the concurrent microstructure and texture evolution. The results show that the room temperature ductility of the Mg sheets was improved by multi-pass bending process. Moreover, the (0002) basal texture was drastically weakened. Enhanced the ambient mechanical properties, such as lower yield strength and larger uniform elongation, were fabricated by MPB path due to the weak basal texture. The microstructure and mechanical responses were characterized and discussed.

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Enhancing mechanical properties of Mg–Sn alloys by combining addition of Ca and Zn

Cited by 124 publications

References 51 publications

Microstructures and mechanical properties of as-ECAPed Mg–8Sn alloys with the combined addition of Zn and Al

Microstructures and mechanical properties of as-ECAPed Mg–8Sn alloys with the combined addition of Zn and Al

On the microstructure and mechanical property of as-extruded Mg-Gd-Y-Zn alloy with Sr addition

Effect of Multi-Pass Bending Deformation on Microstructure Evolution and Mechanical Properties of AZ31 Alloy Sheet

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