Deformation Behavior of Fine Grained Al-Mg Alloy under Biaxial Stress

Masafumi Noda; Kunio Funami

doi:10.4028/www.scientific.net/MSF.503-504.475

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HomeMaterials Science ForumMaterials Science Forum Vols. 503-504Deformation Behavior of Fine Grained Al-Mg Alloy...

Deformation Behavior of Fine Grained Al-Mg Alloy under Biaxial Stress

Abstract:

The grain boundary sliding and the formation of slipped bands and cavitations during biaxial tensile deformation were examined in fine grained Al-Mg alloy. Biaxial tensile testing was conducted with cruciform specimens at initial strain rates of 10-4 to 101s-1. It was found that at the same equivalent strain conditions, the number of cavities under biaxial tension is significantly greater than that under uniaxial tension. A greater prevalence of slipped bands and grain separations were clearly observed under biaxial stress than under uniaxial stress. It was suggested that development of slipped bands resulted from the formation of elongated cavities and multiple deformed bands under biaxial stress. Additionally, the m-value under biaxial stress remained at about 0.3 over a wide range of strain rates. The effects of grain separation and formation of cavities were related to the motion of grain boundary sliding, grain size and loading conditions.

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Periodical:

Materials Science Forum (Volumes 503-504)

Pages:

475-480

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.503-504.475

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Online since:

January 2006

Authors:

Masafumi Noda, Kunio Funami

Keywords:

Biaxial Tension, Cavities, Grain Separation, Strain Rate, Superplastic Deformation

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