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Irradiation-induced hardening and softening of CLAM steel under Fe ion irradiation

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Abstract

The irradiation-induced hardening and softening of CLAM steel irradiated with 3.5 MeV Fe13+ ions at temperatures of 300 °C and 550 °C were investigated by nanoindentation tests in combination with microstructures. Irradiation- induced hardening occurred in the steel irradiated at 300 °C to doses of 0.46 dpa, 0.94 dpa, and 2.79 dpa. The hardening occurred at 300 °C is mainly attributed to the formation of irradiation-produced dislocation loops and a network of tangled dislocations in the irradiated steel samples. Significant hardening was found in the steel irradiated at 550 °C to 0.38 dpa. On the contrary, irradiation-induced softening occurred in the steel irradiated at 550 °C to both 0.76 dpa and 2.75 dpa. Irradiation-produced dislocation loops are not dominant effect on the irradiation hardening of the steel samples irradiated at 550 °C. The hardening and softening of the irradiated steel were explained in terms of the irradiation-produced defects and recovery process occurred during the irradiation.

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Authors and Affiliations

  1. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Qingshan Li, Yinzhong Shen, Xi Huang, Zhiqiang Xu & Jun Zhu

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  1. Qingshan Li
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  2. Yinzhong Shen
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  3. Xi Huang
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  4. Zhiqiang Xu
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  5. Jun Zhu
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Correspondence to Yinzhong Shen.

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Li, Q., Shen, Y., Huang, X. et al. Irradiation-induced hardening and softening of CLAM steel under Fe ion irradiation. Met. Mater. Int. 23, 1106–1111 (2017). https://doi.org/10.1007/s12540-017-7156-0

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  • DOI: https://doi.org/10.1007/s12540-017-7156-0

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