Ni ion damage structures and hardness changes in austenitic stainless steels and their model alloys
Ni ion damage structures and hardness changes in austenitic stainless steels and their model alloys
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DOI：
10.1088/1742-6596/674/1/012009
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发表时间：
2016-01
期刊：
影响因子：
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通讯作者：
K. Sato;S. Ishioka;Q. Xu;T. Yoshiie;H. Tsuchida;A. Itoh
中科院分区：
文献类型：
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作者：
K. Sato;S. Ishioka;Q. Xu;T. Yoshiie;H. Tsuchida;A. Itoh
采用正电子湮没寿命和显微硬度测量方法研究了6 MeV Ni离子辐照后奥氏体不锈钢及其模型合金的缺陷组织。室温辐照后，获得了150 ~ 180 ps的长寿命，随着辐照剂量的增加，维氏硬度增加。在573 K辐照后，所有合金的寿命谱都没有分解成两个组分。硬度随辐照剂量的增加而增加，但与室温下相比增强幅度较小。利用Na-22源可以在表面附近检测到离子辐照引起的缺陷。硬度与缺陷团簇的密度和大小有关。
Defect structures of austenitic stainless steels and their model alloys after 6 MeV Ni ion irradiation were studied using positron annihilation lifetime measurements and Vickers hardness obtained from micro-hardness measurements. After irradiation at room temperature, a long lifetime of 150-180 ps was obtained and the Vickers hardness increased with increasing the irradiation dose. After irradiation at 573 K, all the alloys exhibited lifetime spectra that were not decomposed into two components. Their hardness also increased with the irradiation dose, but the enhancement was small compared with that at room temperature. Defects introduced by the ion irradiation could be detected near the surface using a Na-22 source. The hardness is correlated with the density and size of the defect clusters.