Effect of self-ion irradiation on hardening and microstructure of tungsten

T. Hwang; M. Fukuda; S. Nogami; A. Hasegawa; H. Usami; K. Yabuuchi; K. Ozawa; H. Tanigawa

doi:10.1016/j.nme.2016.06.005

Nuclear Materials and Energy (Dec 2016)

Effect of self-ion irradiation on hardening and microstructure of tungsten

T. Hwang,
M. Fukuda,
S. Nogami,
A. Hasegawa,
H. Usami,
K. Yabuuchi,
K. Ozawa,
H. Tanigawa

Affiliations

T. Hwang: Department of Quantum Science and Energy Engineering, Tohoku University, 6-6-01-2 Aramaki-aza-Aoba, Aobaku, Sendai 980-8579, Japan
M. Fukuda: Department of Quantum Science and Energy Engineering, Tohoku University, 6-6-01-2 Aramaki-aza-Aoba, Aobaku, Sendai 980-8579, Japan
S. Nogami: Department of Quantum Science and Energy Engineering, Tohoku University, 6-6-01-2 Aramaki-aza-Aoba, Aobaku, Sendai 980-8579, Japan
A. Hasegawa: Department of Quantum Science and Energy Engineering, Tohoku University, 6-6-01-2 Aramaki-aza-Aoba, Aobaku, Sendai 980-8579, Japan
H. Usami: Department of Quantum Science and Energy Engineering, Tohoku University, 6-6-01-2 Aramaki-aza-Aoba, Aobaku, Sendai 980-8579, Japan
K. Yabuuchi: Department of Quantum Science and Energy Engineering, Tohoku University, 6-6-01-2 Aramaki-aza-Aoba, Aobaku, Sendai 980-8579, Japan
K. Ozawa: Japan Atomic Energy Agency, 2-166 Oaza-Obuchi-Aza-Omotedate, Rokkasho-mura, Kamikita-gun, Aomori 039-3212, Japan
H. Tanigawa: Japan Atomic Energy Agency, 2-166 Oaza-Obuchi-Aza-Omotedate, Rokkasho-mura, Kamikita-gun, Aomori 039-3212, Japan

DOI: https://doi.org/10.1016/j.nme.2016.06.005
Journal volume & issue: Vol. 9, no. C
pp. 430 – 435

Abstract

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The irradiation hardening and microstructures of pure W and W–3%Re for up to 5.0 dpa by self-ion irradiation were investigated in this work. The ion irradiation was conducted using 18 MeV W6+ at 500 and 800°C. A focused ion beam followed by electro-polishing was used to make thin foil specimens for transmission electron microscope observations. Dislocation loops were observed in all the irradiated samples. Voids were observed in all of the specimens except the W–3%Re irradiated to 0.2 dpa. The hardness was measured by using nanoindentation. The irradiation hardening was saturated at 1.0 dpa for pure W. In the case of W–3%Re, the irradiation hardening showed a peak at 1.0 dpa. The correlation between the microstructure and hardening was investigated.

Published in Nuclear Materials and Energy

ISSN: 2352-1791 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: http://www.journals.elsevier.com/nuclear-materials-and-energy/

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