In situ TEM study of G-phase precipitates under heavy ion irradiation in CF8 cast austenitic stainless steel
In situ TEM study of G-phase precipitates under heavy ion irradiation in CF8 cast austenitic stainless steel
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DOI：
10.1016/j.jnucmat.2015.04.042
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发表时间：
2015-09-01
影响因子：
3.1
通讯作者：
Lian, Tiangan
中科院分区：
文献类型：
--
作者：
Chen, Wei-Ying;Li, Meimei;Lian, Tiangan
在阿贡国家实验室的IVEM-Tandem装置中，用1 MeV Kr离子在300、350和400 ℃下对热时效铸造奥氏体不锈钢（卡斯）CF 8进行辐照，辐照剂量为1.88 x 10（19）离子/m（2）（类似于3 dpa）。辐照前，铁素体中G相析出物的分布呈现空间变化，其尺寸和密度受铁素体-奥氏体相界和M23 C6碳化物的影响。在300 ° C辐照下，原位TEM观察表明，在相界M23 C6碳化物附近，G相析出物相对不变，而铁素体基体中G相析出物的密度随着辐照剂量的增加而增加。在350 ℃和400 ℃下，在相边界M23 C6碳化物附近观察到G相析出物的粗化。由爱思唯尔公司出版
Thermally-aged cast austenitic stainless steels (CASS) CF8 was irradiated with 1 MeV Kr ions at 300, 350 and 400 degrees C to 1.88 x 10(19) ions/m(2) (similar to 3 dpa) at the IVEM-Tandem Facility at the Argonne National Laboratory. Before irradiation, the distribution of G-phase precipitates in the ferrite showed spatial variations, and both their size and density were affected by the ferrite-austenite phase boundary and presence of M23C6 carbides. Under 300 degrees C irradiation, in situ TEM observation showed G-phase precipitates were relatively unchanged in the vicinity of the phase boundary M23C6 carbides, while the density of G-phase precipitates increased with increasing dose within the ferrite matrix. Coarsening of G-phase precipitates was observed in the vicinity of phase boundary M23C6 carbides at 350 degrees C and 400 degrees C. Published by Elsevier B.V.