Extra-Irradiation Hardening of Reduced Activation Ferritic/Martensitic Steel by Multi-Ion Irradiation

The effects of small amount (1 or 2 wt.%) of Ni additionson the irradiation hardening of the reduced-activation ferritic/martensitic steel, F82H, used as fusion reactor blanket structural materials were investigated by means of Fe-ion irradiation experimental test method and nano-indentation technique. The ion-irradiation hardening of Ni-added F82H is larger than that of the steel without Ni addition. The methodology to derive the irradiation hardening of ion-irradiated F82H steel was proposed from the results of hardness depth profile.

Download Full-text

Ion-irradiation hardening of Ti/Ta-added reduced activation ferritic-martensitic steel evaluated with a new nanopillar fabrication technique

Journal of Nuclear Materials ◽

10.1016/j.jnucmat.2018.10.004 ◽

2018 ◽

Vol 512 ◽

pp. 184-192 ◽

Cited By ~ 5

Author(s):

Jungwoo Heo ◽

Sangeun Kim ◽

Hwanuk Guim ◽

Hyung-Ha Jin ◽

Joonoh Moon ◽

...

Keyword(s):

Martensitic Steel ◽

Ion Irradiation ◽

Fabrication Technique ◽

Irradiation Hardening

Download Full-text

Evaluation of Argon ion irradiation hardening of ferritic/martensitic steel-T91 using nanoindentation, X-ray diffraction and TEM techniques

Radiation Effects and Defects in Solids ◽

10.1080/10420150.2017.1379520 ◽

2017 ◽

Vol 172 (7-8) ◽

pp. 678-694 ◽

Cited By ~ 4

Author(s):

N. Naveen Kumar ◽

R. Tewari ◽

P. Mukherjee ◽

N. Gayathri ◽

P. V. Durgaprasad ◽

...

Keyword(s):

Martensitic Steel ◽

Ion Irradiation ◽

X Ray Diffraction ◽

Irradiation Hardening ◽

X Ray ◽

Argon Ion

Download Full-text

Irradiation Hardening Behavior of He-Irradiated V–Cr–Ti Alloys with Low Ti Addition

Quantum Beam Science ◽

10.3390/qubs5010001 ◽

2020 ◽

Vol 5 (1) ◽

pp. 1

Author(s):

Ken-ichi Fukumoto ◽

Yoshiki Kitamura ◽

Shuichiro Miura ◽

Kouji Fujita ◽

Ryoya Ishigami ◽

...

Keyword(s):

Ion Irradiation ◽

Optimum Composition ◽

Solid Solution Hardening ◽

Irradiation Hardening ◽

Hardening Behavior ◽

Ti Alloys ◽

Void Swelling ◽

Before And After ◽

Cr Addition ◽

Ti Addition

A set of V–(4–8)Cr–(0–4)Ti alloys was fabricated to survey an optimum composition to reduce the radioactivity of V–Cr–Ti alloys. These alloys were subjected to nano-indenter tests before and after 2-MeV He-ion irradiation at 500 °C and 700 °C with 0.5 dpa at peak damage to investigate the effect of Cr and Ti addition and gas impurities for irradiation hardening behavior in V–Cr–Ti alloys. Cr and Ti addition to V–Cr–Ti alloys for solid–solution hardening remains small in the unirradiated V–(4–8)Cr–(0–4)Ti alloys. Irradiation hardening occurred for all V–Cr–Ti alloys. The V–4Cr–1Ti alloy shows the highest irradiation hardening among all V–Cr–Ti alloys and the gas impurity was enhanced to increase the irradiation hardening. These results may arise from the formation of Ti(CON) precipitate that was produced by He-ion irradiation. Irradiation hardening of V–Cr–1Ti did not depend significantly on Cr addition. Consequently, for irradiation hardening and void-swelling suppression, the optimum composition of V–Cr–Ti alloys for structural materials of fusion reactor engineering is proposed to be a highly purified V–(6–8)Cr–2Ti alloy.

Download Full-text