Effect of surface roughness on impact expansion fracture of 6061 aluminum alloy thin-walled cylindrical tube

LIU Longfei; ZHOU Qiang

doi:10.11883/bzycj-2016-0389

Volume 38 Issue 4

May 2018

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LIU Longfei, ZHOU Qiang. Effect of surface roughness on impact expansion fracture of 6061 aluminum alloy thin-walled cylindrical tube[J]. Explosion And Shock Waves, 2018, 38(4): 749-758. doi: 10.11883/bzycj-2016-0389

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LIU Longfei, ZHOU Qiang. Effect of surface roughness on impact expansion fracture of 6061 aluminum alloy thin-walled cylindrical tube[J]. Explosion And Shock Waves, 2018, 38(4): 749-758. doi: 10.11883/bzycj-2016-0389

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Effect of surface roughness on impact expansion fracture of 6061 aluminum alloy thin-walled cylindrical tube

doi: 10.11883/bzycj-2016-0389

School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China

Received Date: 2016-12-20
Rev Recd Date: 2017-09-09
Publish Date: 2018-07-25

Abstract

Abstract

Dynamic expansion crack freezing recovery tests of 6061 aluminum alloy thin-walled cylindrical tubes with different roughnesses after surface processing were carried out with the split Hopkinson pressure bar experimental technique, and the crack initiation, propagation and final fracture mode of the thin-walled metal cylindrical tubes of dynamic expansion fracture process were studied. The results show that: under the same impact pressure, the greater the surface roughness of the thin-walled metal cylindrical tube, the more prone to the expansion of the material in the process of expanding fracture; the crack initiating on the surface of the outer wall is extended from the outside to the inside, and the crack propagation is mainly affected by the stress state at the crack; the fracture mode is dominated by the tensile and shear fracture mechanism, the fracture mode is a mixed type of tension and shear fracture.
- 6061 aluminum alloy,
- split Hopkinson pressure bar (SHPB),
- thin-walled cylindrical tube,
- expansion fracture

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References(15)

References

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