The tensile deformation behaviour of an aluminium-magnesium alloy

In this study, to investigate effects of yttrium and other elements for non-basal slips, magnesium alloy single crystals were stretched parallel to basal plane in various temperatures, and polycrystalline magnesium alloys were also tested to estimate contribution of non-basal slips to their tensile deformation behaviour. In pure magnesium single crystals, second order pyramidal (c+a) slip (SPCS) was observed at 298K. Above room temperature, first order pyramidal (c+a) slip (FPCS) was active. In the Mg - (0.6-0.9) Y alloy single crystals, FPCS was observed at 77K to 298K, while yield stress of the Mg-Y alloy single crystals was higher than that of pure magnesium. In tensile test of polycrystalline specimen, slips lines of non-basal slip systems such as SPCS, FPCS and prismatic slip were observed even at yielding in addition to basal slip lines. Among the non-basal slips, activities of FPCS and prismatic slips were increased with increasing strain in Mg - Y alloy polycrystals. Our study suggested that active non-basal slip system in tension parallel to basal plane is (c+a) pyramidal slip and enhanced ductility of magnesium - yttrium alloy would be caused from increased activity of FPCS by yttrium addition.

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Hot tensile deformation constitutive equation and processing map of AZ61Ce magnesium alloy sheet

Materials Research Express ◽

10.1088/2053-1591/aafa22 ◽

2019 ◽

Vol 6 (4) ◽

pp. 046521 ◽

Cited By ~ 3

Author(s):

Zhenxiong Wei ◽

Zhongjun Wang ◽

Jing Zhu ◽

Weijuan Li ◽

Hongbin Wang

Keyword(s):

Magnesium Alloy ◽

Constitutive Equation ◽

Processing Map ◽

Tensile Deformation ◽

Alloy Sheet ◽

Magnesium Alloy Sheet ◽

Hot Tensile Deformation

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Influence of Uncoupled Diblock Molecules on Mechanical Properties of Styerene/Butadiene/ Styrene Triblock Copolymers

Nepal Journal of Science and Technology ◽

10.3126/njst.v12i0.6493 ◽

2012 ◽

Vol 12 ◽

pp. 149-156 ◽

Cited By ~ 5

Author(s):

Rameshwar Adhikari

Keyword(s):

Mechanical Properties ◽

Block Copolymers ◽

Tensile Deformation ◽

Triblock Copolymers ◽

Large Strain ◽

Deformation Behaviour ◽

Mechanical Analysis ◽

Transmission Electron ◽

Star Block Copolymers ◽

Butadiene Styrene

The influence of the presence of uncoupled polystyrene-block-polybutadiene (SB) diblock chains to polystyrene-block-polybutadiene-block-polystyrene (SBS) triblock copolymers on the mechanical properties of the latter has been studied by means of tensile testing and dynamic mechanical analysis preparing several lamellae forming SBS/ SB blends through solution casting. The microphase-separated morphology of the samples was investigated by transmission electron microscopy. Both large strain deformation tensile deformation behaviour and viscoelastic properties of the SBS block copolymers were found to be affected appreciably by the presence of uncoupled SB diblock. The storage modulus of linear SBS was found to drop more sharply in the plateau region than for the radial SBS at the same SB content. At low SB content (up to 20 wt.-% for linear SBS and still higher for radial one), the overall tensile properties was not negatively influenced. On the whole, star block copolymers were found to be less sensitive towards the presence of diblock.DOI: http://dx.doi.org/10.3126/njst.v12i0.6493 Nepal Journal of Science and Technology 12 (2011) 149-156

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The tensile deformation behavior of AZ31B magnesium alloy sheet under intermittent pulse current

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/09544062211024280 ◽

2021 ◽

pp. 095440622110242

Author(s):

Ju Guo ◽

Xiao-Lei Cui ◽

Wen-Kai Zhao ◽

Cheng-Zhong Chi ◽

Xiao-Qing Cao ◽

...

Keyword(s):

Magnesium Alloy ◽

Deformation Behavior ◽

Pulse Current ◽

Tensile Deformation ◽

Fracture Morphology ◽

Alloy Sheet ◽

Az31b Magnesium Alloy ◽

Magnesium Alloy Sheet ◽

Tensile Deformation Behavior ◽

Az31b Magnesium Alloy Sheet

In this paper, to investigate the effect of loading method of pulse current on the tensile deformation behavior of AZ31B magnesium alloy sheet, the intermittent pulse current with short-time and high-frequency was introduced in uniaxial tensile tests and the influence of duty ratio and loading time of pulse current on the deformation behavior of AZ31B magnesium alloy sheet was discussed. The strain and temperature field distributions on the specimens were measured during the intermittent pulse electrically-assisted tension (IPEAT), and the microstructure and fracture morphology under different pulse current conditions were observed. Results shows appropriate pulse current parameters can effectively improve the elongation of AZ31B magnesium alloy sheet. The strain of the sample is closely related to temperature distribution. With the deformation of the sample, the temperature on the sample increases gradually and the temperature distribution is non-uniform along the tensile direction, resulting in an inhomogeneous strain distribution of the sample. In addition, grain growth and dynamic recrystallization were observed on the AZ31B magnesium alloy sheet in different degrees under intermittent pulse current. Fracture morphology analysis shows that the number of dimples and tearing edges increased on the fracture obtained under IPEAT. The microhardness analysis shows that when intermittent pulse current is applied in the tensile test, the hardness of the sheet may change. This research provides an effective idea for the forming process of magnesium alloy sheets, which can be used to form large size thin-walled sheet components, and can significantly improve the forming quality of the sheets.

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