Localized shear deformation in magnesium alloy by four-point bending

2020 ◽  
Vol 793 ◽  
pp. 139851
Author(s):  
Yutaka Yoshida ◽  
Jun-ichi Shibano ◽  
Mikiya Ogura ◽  
Kota Saito ◽  
Kentaro Kajiwara
Keyword(s):  
Magnesium Alloy ◽  
Shear Deformation ◽  
Four Point Bending ◽  
Localized Shear Deformation

Research on Damage and Bending Properties of AZ31 Magnesium Alloy

2012 ◽  
Vol 184-185 ◽  
pp. 1163-1166
Author(s):  
Xi An Xie ◽  
Gao Feng Quan
Keyword(s):  
Magnesium Alloy ◽  
Applied Load ◽  
Bending Strength ◽  
Az31 Magnesium Alloy ◽  
Bending Test ◽  
Bending Properties ◽  
Four Point Bending ◽  
Heat Treated ◽  
Four Point Bending Test ◽  
Initial Cracks

Through the four-point bending test of lath-shaped heat treated AZ31 magnesium alloy, the bending properties and damage characteristics were explored. The results show that the optimal bending strength of the magnesium alloy were 355.1MPa and 259.2MPa for extruded and cast samples, respectively, after corresponding heat treatment with 350°C, 90min and 400°C, 30min. The initial cracks both occurred at the loading point after applied load exceeded the yield limit of AZ31 magnesium alloy. Surface bump, cracks and other damage morphology accompanied by a large number of twinning organizations were found on the surface of the samples.

Highly localized shear deformation in a Mg–Al–Mn alloy subjected to ballistic impact

Vacuum ◽  
2019 ◽  
Vol 169 ◽  
pp. 108868 ◽  
Author(s):  
Bo Zhang ◽  
Jian-Tang Jiang ◽  
Li Liu ◽  
Guo-Ai Li ◽  
Wen-Zhu Shao ◽  
...  
Keyword(s):  
Shear Deformation ◽  
Ballistic Impact ◽  
Localized Shear Deformation

scholarly journals Bending Behavior of a Wrought Magnesium Alloy Investigated by the In Situ Pinhole Neutron Diffraction Method

Crystals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 348 ◽  
Author(s):  
Wei Wu ◽  
Alexandru Stoica ◽  
Dunji Yu ◽  
Matthew Frost ◽  
Harley Skorpenske ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Neutron Diffraction ◽  
Spatial Resolution ◽  
Diffraction Method ◽  
Middle Layer ◽  
Mapping Method ◽  
Step Size ◽  
Four Point Bending ◽  
Wrought Magnesium Alloy

The tensile twinning and detwinning behaviors of a wrought magnesium alloy have been investigated during in situ four-point bending using the state-of-the-art high spatial resolution pinhole neutron diffraction (PIND) method. The PIND method allowed us to resolve the tensile twinning/detwinning and lattice strain distributions across the bending sample during a loading-unloading sequence with a 0.5 mm step size. It was found that the extensive tensile twinning and detwinning occurred near the compression surface, while no tensile twinning behavior was observed in the middle layer and tension side of the bending sample. During the bending, the neutral plane shifted from the compression side to the tension side. Compared with the traditional neutron diffraction mapping method, the PIND method provides more detailed information inside the bending sample due to a higher spatial resolution.

Localized Shear Deformation of Amorphous Metals

1981 ◽  
Vol 8 ◽  
Author(s):  
J.C.M. Li
Keyword(s):  
Stress Concentration ◽  
Shear Deformation ◽  
Narrow Band ◽  
Shear Localization ◽  
Amorphous Metals ◽  
Localized Deformation ◽  
Crystalline Materials ◽  
Localized Shear Deformation

ABSTRACTThe characteristics of localized deformation in amorphous metals are reviewed. All the available evidences seem to suggest that dislocations are responsible for shear localization. These dislocations seem to require a stress concentration for their nucleation. Once nucleated, they are capable of producing both forward and reverse shear in a narrow band, much like the dislocations in crystalline materials.

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