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The effect of twinning and detwinning on the mechanical property of AZ31 extruded magnesium alloy during strain-path changes
Highlights The detwinning behavior occurred during inverse tension test. Tension yield strength decreased as the increase of pre-compression levels. The ductility was improved by pre-compression for {10−12} twins. Detwinning was restrained during compression tests in pre-stretch samples. Compression yield strength increased as pre-stretch levels increasing.
Abstract In order to investigate the effect of twinning–detwinning on the mechanical properties of AZ31 extruded magnesium alloy pre-compression and pre-stretch deformation were conducted along extrusion direction (ED) at 1%, 3%, 5% strain levels. After pre-strain, the strain-path was inverted by performing tensile or compressive tests at room temperature. Results showed that the detwinning behavior occurred during the inverse tension after the pre-compression. Although due to the aforementioned effect the tensile yield strength decreased, by increasing the pre-compressive levels both fracture elongation and peak strength improved. In the inverse compressive tests after pre-stretch the {10−12} twinning was restrained and the volume fraction of twins decreased, leading to the improvement of yield strength by increasing in pre-stretching levels.
The effect of twinning and detwinning on the mechanical property of AZ31 extruded magnesium alloy during strain-path changes
Highlights The detwinning behavior occurred during inverse tension test. Tension yield strength decreased as the increase of pre-compression levels. The ductility was improved by pre-compression for {10−12} twins. Detwinning was restrained during compression tests in pre-stretch samples. Compression yield strength increased as pre-stretch levels increasing.
Abstract In order to investigate the effect of twinning–detwinning on the mechanical properties of AZ31 extruded magnesium alloy pre-compression and pre-stretch deformation were conducted along extrusion direction (ED) at 1%, 3%, 5% strain levels. After pre-strain, the strain-path was inverted by performing tensile or compressive tests at room temperature. Results showed that the detwinning behavior occurred during the inverse tension after the pre-compression. Although due to the aforementioned effect the tensile yield strength decreased, by increasing the pre-compressive levels both fracture elongation and peak strength improved. In the inverse compressive tests after pre-stretch the {10−12} twinning was restrained and the volume fraction of twins decreased, leading to the improvement of yield strength by increasing in pre-stretching levels.
The effect of twinning and detwinning on the mechanical property of AZ31 extruded magnesium alloy during strain-path changes
Wang, Lifei (author) / Huang, Guangsheng (author) / Quan, Quan (author) / Bassani, Paola (author) / Mostaed, Ehsan (author) / Vedani, Maurizio (author) / Pan, Fusheng (author)
2014-05-27
8 pages
Article (Journal)
Electronic Resource
English
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