Effects of temperature variation on damage microstructures in Fe-Cr-Ni alloy induced by heavy ion irradiation
Effects of temperature variation on damage microstructures in Fe-Cr-Ni alloy induced by heavy ion irradiation
复制标题
温度变化对Fe-Cr-Ni合金重离子辐照损伤组织的影响
DOI：
10.1016/0022-3115(94)90067-1
复制
发表时间：
1994
影响因子：
3.1
通讯作者：
N. Yoshida
中科院分区：
文献类型：
--
作者：
Qiu Xu;Hideo Watanabe;T. Muroga;N. Yoshida
为研究变温对Fe-Cr-Ni奥氏体模型合金显微组织演变的影响，用4 MeV的Cu离子在473、573、773 K恒温和473/773、573/773 K变温条件下辐照。在较低的温度下预照射增加间隙环密度在随后的照射在较高的温度下，即使前照射的剂量低。而在473 K或573 K时形成的间隙环在773 K的第二步辐照中基本消失。这种现象不认为是热退火的结果，而认为是由在较低温度和较高温度下形成的缺陷或缺陷簇的反应引起的。辐照过程中晶体和空位的缺陷聚集模型表明，在变温辐照的情况下，小空位团簇的分解暂时导致意外的富空位状态。
To study the effects of varying temperature on microstructural evolution, Fe-Cr-Ni austenitic model alloy was irradiated with 4 MeV Cu ions at constant temperatures of 473, 573, 773 K and stepwise temperature variation of 473/773, 573/773 K. Preirradiation at lower temperatures increased interstitial loop density in the subsequent irradiation at higher temperature, even if the dose of the former irradiation was low. However, most of the interstitial loops formed at 473 K or 573 K disappeared in the second step irradiation at 773 K. This phenomenon is not thought to be the result of thermal annealing but believed to be caused by reaction of defects or defect clusters formed at both lower temperature and higher temperature. A defect clustering model for interstitials and vacancies during irradiation indicates that the resolution of small vacancy clusters causes unexpected vacancy-rich condition temporarily in the case of temperature-variant irradiation.