Corrosion behavior of (Fe,Ni)–Gd intermetallic compounds in FeNi-based neutron-absorbing steels

Ha, Heung Yong; Lee, Tae‐Ho; Jo, Hyo-Haeng; Lee, Jin-Jong; Jang, Jae Hoon

doi:10.1016/j.jnucmat.2023.154367

Cited by 4 publications

(1 citation statement)

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“…The decreases in Rp value after the Gd addition were 69.01%, 74.41%, and 85.78% for 304, 316, and 5A, respectively. It is noteworthy that our results are similar to previous studies in that the corrosion properties of the Gd-incorporated alloys decreased as the contents of Gd increased [8,17,31]. This was attributed to the higher reactivity of Gd compared with Fe, Cr, and Ni.…”

Section: Corrosion Resistances Of the Alloyssupporting

confidence: 90%

Characterization of Various Stainless Steels Containing Gadolinium as Thermal Neutron Absorbing and Shielding Materials

Oh,

Ahn,

Jung

et al. 2023

Metals

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Developing next-generation thermal-neutron-shielding and -absorbing materials for the safe storage and transportation of spent nuclear fuel is a topic of active research in academia. Gadolinium (Gd) boasts superior neutron absorption capacity compared with other nuclei. Consequently, it has garnered significant attention as a potential replacement for boron in spent nuclear fuel (SNF) applications. In this study, the austenitic stainless steels 304 and 316 and the duplex stainless steel 5A were reinforced with 2 wt.% of gadolinium to explore their thermal-neutron-absorbing efficiency. Their properties were then compared with commercial-grade borated stainless steel, as per ASTM standard A887. After the inclusion of Gd, both the yield strength and ultimate tensile strength of the alloys slightly increased, which was attributed to the evenly distributed Gd intermetallics within the matrix. However, the elongation rate was reduced. The Charpy impact absorption energy also decreased. The influence of the Gd intermetallic was further explored by examining the fractography. While the corrosion resistance of the alloy slightly diminished after the addition of Gd, its neutron absorption capacity demonstrated superior performance, especially when the Gd content was equivalent to that of boron. Although most properties of the experimental alloy deteriorated after the Gd addition, they still outperformed commercial borated stainless steel, suggesting that this alloy might be a promising candidate for SNF applications.

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Section: Corrosion Resistances Of the Alloyssupporting

confidence: 90%