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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2015.1
- 수록면
- 832 - 841 (10page)
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High temperature deformation behavior of the 7075 aluminum alloy sheets fabricated by twin roll casting and rolling was investigated by hot tensile tests at different temperatures from 350 to 500 °C and various initial strain rates from 1×10-3 to 1×10-2 s-1. The results show that flow stress increased with increasing initial strain rate and decreasing deformation temperature. A large elongation of 200% was obtained at relatively high strain rate of 5×10-3 s-1 at 450 °C. It is closely related with the grain boundary sliding at elevated temperature attributed to the recrystallized fine grains and the large volume fraction of high-angle grain boundaries. The fracture transformation mechanism changes from ductile transgranular fracture to ductile intergranular fracture due to the recrystallized fine grains at high temperature. High density and uniform cavities observed in large elongation samples at high temperature reveals the contribution of grain boundary sliding. Necking-controlled failure mode was characterized by rare cavities with low elongation.
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참고문헌 (33)
참고문헌 신청
Xu Chen / 2013 / Transition of Crack Propagation from a Transgranular to an Intergranular Path in an Overaged Al-Zn-Mg-Cu Alloy During Cyclic Loading / Metals and Materials International 19(2):197~203
A. Heinz / 2000 / Mater. Sci. Eng. A 280:102
J. C. Williams / 2003 / Acta Mater 51:5775
N. P. Jin / 2009 / Mater. Charact 60:530
Jae-Hyung Cho / 2014 / Microstructure and Mechanical Properties of Al-Si-Mg Alloys Fabricated by Twin Roll Casting and Subsequent Symmetric and Asymmetric Rolling / Metals and Materials International 20(4):647~652
A. Heinz / 2000 / Mater. Sci. Eng. A 280:102
J. C. Williams / 2003 / Acta Mater 51:5775
N. P. Jin / 2009 / Mater. Charact 60:530
Jae-Hyung Cho / 2014 / Microstructure and Mechanical Properties of Al-Si-Mg Alloys Fabricated by Twin Roll Casting and Subsequent Symmetric and Asymmetric Rolling / Metals and Materials International 20(4):647~652
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