Investigation on In Situ Tensile of Extruded 1420 Al-Li Alloy

Zhong Wei Chen; Jing Zhao; Shi Shun Li; Ji Zhao Zou

doi:10.4028/www.scientific.net/AMR.430-432.705

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 430-432Investigation on In Situ Tensile of Extruded 1420...

Investigation on In Situ Tensile of Extruded 1420 Al-Li Alloy

Abstract:

In-situ tensile tests of extruded 1420 Al-Li alloy were investigated in field emission scanning electron microscope. Results show that the fracture process is as follows: in the initial stage of tension, the dislocation begins to move, and pile up when meeting strengthening phases; the dislocation cuts through the strengthening phases, and induces their break; the subsequent dislocation moves through the broken strengthening phases, leading to the initiating and propagating fast of the cracks; with opening of small cracks produced at multiple sites, the longer cracks form and keep the propagating, at last the main crack form, result in the fracture of the sample. The fracture mode of extruded 1420 alloy is mixture of ductile and transgranular fracture. The weak texture of extruded 1420 sample transformed from texture {001} to {018} similar to texture {001} of cubic system after tension fracture

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Periodical:

Advanced Materials Research (Volumes 430-432)

Pages:

705-708

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.430-432.705

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Online since:

January 2012

Authors:

Zhong Wei Chen, Jing Zhao, Shi Shun Li, Ji Zhao Zou

Keywords:

Extruded 1420 Al-Li Alloy, Fracture, In Situ Tension, Texture

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