VOID SWELLING IN BINARY FE-CR ALLOYS AT 200 DPA
VOID SWELLING IN BINARY FE-CR ALLOYS AT 200 DPA
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DOI：
10.1016/0022-3115(95)00053-4
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发表时间：
1995-08-01
影响因子：
3.1
通讯作者：
GELLES, DS
中科院分区：
文献类型：
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作者：
GELLES, DS
在425℃~ 200dpa的FFTF/MOTA中，对一系列二元Fe-Cr合金进行了显微组织检查。这些数据代表了迄今为止在中子辐照铁素体合金中报道的最高膨胀水平。合金成分在3% Cr增量范围内为3 ~ 18% Cr，辐照温度符合该类合金的峰值膨胀条件。密度测量显示膨胀率高达7.4%，其中Fe-9Cr和-6Cr合金的膨胀率最高。显微组织检查显示，最高膨胀条件包含发育良好的空洞，通常大至100 nm，以及由a/2[111]和a[100] Burgers矢量组成的位错网络。其他合金的溶胀率较低，溶胀率的减小与析出量的增加有关。这些结果是根据目前铁素体合金的低膨胀理论来考虑的，但没有发现一个理论可以完全解释这些结果。
Microstructural examinations have been performed on a series of binary Fe-Cr alloys irradiated in the FFTF/MOTA at 425 degrees C to 200 dpa. The data represent the highest swelling levels reported to date in neutron-irradiated ferritic alloys. The alloy compositions ranged from 3 to 18% Cr in 3% Cr increments and the irradiation temperature corresponded to the peak swelling condition for this alloy class. Density measurements showed swelling levels as high as 7.4%, with the highest swelling found in the Fe-9Cr and -6Cr alloys. Microstructural examinations revealed that the highest swelling conditions contained well-developed voids, often as large as 100 nm, and a dislocation network comprised of both a/2[111] and a[100] Burgers vectors. Swelling was lower in the other alloys, and the swelling reduction could be correlated with increased precipitation. These results are considered in light of the current theories for low swelling in ferritic alloys, but no theory is found to completely explain the results.