Low temperature embritllement of low energy He implanted pure iron and iron-based alloys

Y. Nakamura; S. Kitajima; K. Shinohara; S. Ishimoto; T. Shodai; T. Torimaru; K. Yasuda

doi:10.1016/0022-3115(91)90197-F

Low temperature embritllement of low energy He implanted pure iron and iron-based alloys

Y. Nakamura, S. Kitajima, K. Shinohara, S. Ishimoto, T. Shodai, T. Torimaru, K. Yasuda

Quantum Sciences of Materials

Research output: Contribution to journal › Article

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Abstract

Polycrystalline plates of pure iron, Fe-0.0018 wt% C and 0.0042 wt% C alloys, Fe-3.25 wt% Si alloy and JFMS steel were injected with 100 keV He ions up to a dose of 4 × 10²¹ ions/m², and tensile-tested at 77 K. He-injected pure iron and Fe-Si alloy showed brittle fracture in intergranular and transgranular manners, respectively. Surface cracks, which started at grain boundaries, extended to a depth of several 10 μm. These results indicate that surface cracks trigger off brittle fracture of injected pure iron and Fe-Si alloy. He-injected Fe-C alloys and JFMS steel showed transgranular fracture and surface cracks which formed at grain boundaries did not extend into the interior. The present results were discussed in terms of the weakening of grain boundaries by implanted He bubbles and the ratio of the strength of the grain boundary to that of the matrix.

Original language	English
Pages (from-to)	749-752
Number of pages	4
Journal	Journal of Nuclear Materials
Volume	179-181
Issue number	PART 1
DOIs	https://doi.org/10.1016/0022-3115(91)90197-F
Publication status	Published - Jan 1 1991

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Materials Science(all)
Nuclear Energy and Engineering

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10.1016/0022-3115(91)90197-F

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Nakamura, Y., Kitajima, S., Shinohara, K., Ishimoto, S., Shodai, T., Torimaru, T., & Yasuda, K. (1991). Low temperature embritllement of low energy He implanted pure iron and iron-based alloys. Journal of Nuclear Materials, 179-181(PART 1), 749-752. https://doi.org/10.1016/0022-3115(91)90197-F

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title = "Low temperature embritllement of low energy He implanted pure iron and iron-based alloys",

abstract = "Polycrystalline plates of pure iron, Fe-0.0018 wt% C and 0.0042 wt% C alloys, Fe-3.25 wt% Si alloy and JFMS steel were injected with 100 keV He ions up to a dose of 4 × 1021 ions/m2, and tensile-tested at 77 K. He-injected pure iron and Fe-Si alloy showed brittle fracture in intergranular and transgranular manners, respectively. Surface cracks, which started at grain boundaries, extended to a depth of several 10 μm. These results indicate that surface cracks trigger off brittle fracture of injected pure iron and Fe-Si alloy. He-injected Fe-C alloys and JFMS steel showed transgranular fracture and surface cracks which formed at grain boundaries did not extend into the interior. The present results were discussed in terms of the weakening of grain boundaries by implanted He bubbles and the ratio of the strength of the grain boundary to that of the matrix.",

author = "Y. Nakamura and S. Kitajima and K. Shinohara and S. Ishimoto and T. Shodai and T. Torimaru and K. Yasuda",

year = "1991",

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doi = "10.1016/0022-3115(91)90197-F",

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T1 - Low temperature embritllement of low energy He implanted pure iron and iron-based alloys

AU - Nakamura, Y.

AU - Kitajima, S.

AU - Shinohara, K.

AU - Ishimoto, S.

AU - Shodai, T.

AU - Torimaru, T.

AU - Yasuda, K.

PY - 1991/1/1

Y1 - 1991/1/1

N2 - Polycrystalline plates of pure iron, Fe-0.0018 wt% C and 0.0042 wt% C alloys, Fe-3.25 wt% Si alloy and JFMS steel were injected with 100 keV He ions up to a dose of 4 × 1021 ions/m2, and tensile-tested at 77 K. He-injected pure iron and Fe-Si alloy showed brittle fracture in intergranular and transgranular manners, respectively. Surface cracks, which started at grain boundaries, extended to a depth of several 10 μm. These results indicate that surface cracks trigger off brittle fracture of injected pure iron and Fe-Si alloy. He-injected Fe-C alloys and JFMS steel showed transgranular fracture and surface cracks which formed at grain boundaries did not extend into the interior. The present results were discussed in terms of the weakening of grain boundaries by implanted He bubbles and the ratio of the strength of the grain boundary to that of the matrix.

AB - Polycrystalline plates of pure iron, Fe-0.0018 wt% C and 0.0042 wt% C alloys, Fe-3.25 wt% Si alloy and JFMS steel were injected with 100 keV He ions up to a dose of 4 × 1021 ions/m2, and tensile-tested at 77 K. He-injected pure iron and Fe-Si alloy showed brittle fracture in intergranular and transgranular manners, respectively. Surface cracks, which started at grain boundaries, extended to a depth of several 10 μm. These results indicate that surface cracks trigger off brittle fracture of injected pure iron and Fe-Si alloy. He-injected Fe-C alloys and JFMS steel showed transgranular fracture and surface cracks which formed at grain boundaries did not extend into the interior. The present results were discussed in terms of the weakening of grain boundaries by implanted He bubbles and the ratio of the strength of the grain boundary to that of the matrix.

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