Particle Cracking and Rotation during Plastic Deformation of 7075 Aluminum Alloy

다국어 초록 (Multilingual Abstract)

The utility of a novel digital image processing technique for automatic detection and separation of cracked
constituent particles was applied to quantitatively characterize the microstructural damage on Fe-rich intermetallic
particles that were cracked in a 7075 Al-alloy. This cracking of the Fe-rich intermetallic particles
was due to a function of strain under uniaxial tension, compression, and torsion. The comparison of the data
on the strained samples revealed that at tensile strain, the number fraction of the cracked Fe-rich particles
was significantly higher than those at torsion while the compression strains and the average volume of the
cracked Fe-rich particles increased when the strain increased. The percentage-cracked particles had a linear
relationship with all of the strains for all of the loading conditions. Significant rotations of Fe-rich intermetallic
particles occurred during the deformation of this alloy under torsion. These rotations tended to align themselves
along the direction of applied/induced tensile stretch, which in turn affected the progression of damage due
to particle cracking.

다국어 초록 (Multilingual Abstract)

The utility of a novel digital image processing technique for automatic detection and separation of cracked
constituent particles was applied to quantitatively characterize the microstructural damage on Fe-rich intermetallic
particles that were cracked in a 7075 Al-alloy. This cracking of the Fe-rich intermetallic particles
was due to a function of strain under uniaxial tension, compression, and torsion. The comparison of the data
on the strained samples revealed that at tensile strain, the number fraction of the cracked Fe-rich particles
was significantly higher than those at torsion while the compression strains and the average volume of the
cracked Fe-rich particles increased when the strain increased. The percentage-cracked particles had a linear
relationship with all of the strains for all of the loading conditions. Significant rotations of Fe-rich intermetallic
particles occurred during the deformation of this alloy under torsion. These rotations tended to align themselves
along the direction of applied/induced tensile stretch, which in turn affected the progression of damage due
to particle cracking.

참고문헌 (Reference)

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