THE EFFECTS OF PRE-STRAIN ON TENSILE PROPERTIES OF NEUTRON IRRADIATION HIGH-PURITY ALUMINUM

Ye Xiangping; Duan Zhiwei; Yu Yuying; Geng Huayun; Li Xuemei; Hu Ling; Cai Lingcang; Liu Cangli

doi:10.6052/0459-1879-19-370

Volume 52 Issue 3

Jun. 2020

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Article Navigation > Chinese Journal of Theoretical and Applied Mechanics > 2020 > 52(3): 797-804

Ye Xiangping, Duan Zhiwei, Yu Yuying, Geng Huayun, Li Xuemei, Hu Ling, Cai Lingcang, Liu Cangli. THE EFFECTS OF PRE-STRAIN ON TENSILE PROPERTIES OF NEUTRON IRRADIATION HIGH-PURITY ALUMINUM[J]. Chinese Journal of Theoretical and Applied Mechanics, 2020, 52(3): 797-804. doi: 10.6052/0459-1879-19-370

Citation:

Ye Xiangping, Duan Zhiwei, Yu Yuying, Geng Huayun, Li Xuemei, Hu Ling, Cai Lingcang, Liu Cangli. THE EFFECTS OF PRE-STRAIN ON TENSILE PROPERTIES OF NEUTRON IRRADIATION HIGH-PURITY ALUMINUM[J]. Chinese Journal of Theoretical and Applied Mechanics, 2020, 52(3): 797-804. doi: 10.6052/0459-1879-19-370

Citation:

Ye Xiangping, Duan Zhiwei, Yu Yuying, Geng Huayun, Li Xuemei, Hu Ling, Cai Lingcang, Liu Cangli. THE EFFECTS OF PRE-STRAIN ON TENSILE PROPERTIES OF NEUTRON IRRADIATION HIGH-PURITY ALUMINUM[J]. Chinese Journal of Theoretical and Applied Mechanics, 2020, 52(3): 797-804. doi: 10.6052/0459-1879-19-370

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THE EFFECTS OF PRE-STRAIN ON TENSILE PROPERTIES OF NEUTRON IRRADIATION HIGH-PURITY ALUMINUM

doi: 10.6052/0459-1879-19-370

^*National Key Laboratory for Shock Wave and Detonation Physics, Institute of Fluid Physics, Mianyang 621900, Sichuan, China
^†China Academy of Engineering Physics, Mianyang 621900, Sichuan, China

Received Date: 2019-12-25
Publish Date: 2020-06-10

Abstract

Abstract

Neutron irradiation hardening and embrittlement of metallic materials is very important in the field of nuclear energy and safety. In order to further understand the effects of pre-strain on the plastic deformation and fracture characteristics of neutron irradiated metals and its microscopic mechanism, the tensile stress-strain, plastic instability stress and plastic instability strain of tensile pre-strain high-purity aluminum with different doses were studied in this paper. The results showed that a higher dose results in a higher density and size of voids, a higher yield strength and ultimate tensile stress, a smaller elongation ratio and plastic instability strain, which showed a typical radiation hardening and embrittlement effects, but the plastic instability stress was almost independent of dose. Under the same dose, the high density of dislocation inducing by pre-strain could significantly reduce the size and density of voids, coupling the irradiation annealing effect, that resulted in the pre-strain could reduce the growth rate of yield strength and the falling rate of plastic instability strain, which means the pre-strain could inhibit irradiation hardening and irradiation embrittlement of neutron irradiated high-purity aluminum to a certain degree, but the pre-strain could not improve ductility of high-purity aluminum. Finally, the neutron irradiation embrittlement model for annealed metals basing on Johnson-Cook constitutive model could be directly applied to pre-strain metal materials, and the predicted results of present model agreed well with the experimental data. This means the neutron irradiation embrittlement model for metals basing on Johnson-Cook constitutive model can predict the whole true stress-strain curve, and the fracture true strain of the irradiated annealed and pre-strain metal materials by using the true stress-strain of unirradiated annealed metal and the yield strength of metals with different doses and pre-strain only. That is very important in the field of estimating and predicting safety of nuclear reactor.
- neutron irradiation,
- high-purity aluminum,
- pre-strain,
- embrittlement model,
- plastic instability strain,
- plastic instability stress

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References(33)

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