Recovery of yield stress in dilute Ni alloys after electron and neutron irradiations at low temperatures
Recovery of yield stress in dilute Ni alloys after electron and neutron irradiations at low temperatures
复制标题
低温电子和中子辐照后稀镍合金屈服应力的恢复
DOI：
10.1016/0022-3115(91)90454-f
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发表时间：
1991
影响因子：
3.1
通讯作者：
M. Kobiyama
中科院分区：
文献类型：
--
作者：
K. Nakata;S. Takamura;M. Kobiyama
通过拉伸试验研究了7种稀镍合金和纯镍合金在低温下电子和中子辐照引起的屈服应力增大以及辐照后的等时退火行为。在78 K的电子辐照下，溶质尺寸过小的Si合金和原子尺寸不匹配较大的Au和In合金的屈服应力增加明显。辐照后等时曲线出现了两个恢复阶段（78 ~ 300 K）和恢复阶段（300 ~ 450 K）。在Au、in和Mn溶质过大的合金中没有发现第二阶段。相反，随着Ni溶质原子尺寸的增大，第三阶段屈服应力恢复增大，最大恢复温度向更高温度移动。在78 K时，溶质对辐射诱导的屈服应力增加和78 ~ 723 K的等时退火行为影响不大。
Yield stress increase due to electron and neutron irradiations at low temperatures and the isochronal annealing behaviour after the irradiations have been studied by tensile tests in seven kinds of dilute Ni alloys and pure Ni. In the electron irradiation at 78 K, the yield stress increase was remarkably large in the alloys with an undersized solute, Si, and oversized ones with large atomic size misfit, such as Au and In. Two recovery stages II (78–300 K) and III (300–450 K) appeared in the isochronal curves after the irradiation. Stage II was not found in the alloys with oversized solutes of Au, In and Mn. On the contrary, the yield stress recovery in stage III increased with atomic size of the solutes in Ni, and the maximum recovery temperature shifted to higher temperatures. Little effect of solutes on the radiation-induced yield stress increase at 78 K and isochronal annealing behaviour from 78 to 723 K were observed in the case of neutron irradiation.