Nanoindentation investigation of ion-irradiated Fe-Cr alloys using spherical indenters
Nanoindentation investigation of ion-irradiated Fe-Cr alloys using spherical indenters
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DOI：
10.1557/jmr.2011.304
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发表时间：
2012-01-01
影响因子：
2.7
通讯作者：
Hardie, Christopher D.
中科院分区：
文献类型：
--
作者：
Bushby, Andrew J.;Roberts, Steve G.;Hardie, Christopher D.
材料在大剂量中子辐射下的性能研究是当前发展核聚变能源生产的重要课题。用2 MeV Fe+离子对一种Fe12%Cr合金进行高剂量(6 Dpa)辐照，模拟中子辐照引起的损伤结构，得到了一层深度约为0.7微米的损伤层。利用半径为5、10和20微米的球形纳米压痕，确定了该材料在辐照和未辐照条件下的初始屈服压力、塑性变形演化和弹性模量值的可靠数值。结果表明，损伤层内的初始屈服压力是可以确定的，在未辐照条件下，初始屈服压力约为相同材料屈服压力的两倍。辐照后的材料表现出屈服后的应变软化。
The performance of materials exposed to high doses of neutron radiation is currently of great interest for the development of nuclear fusion energy production. An Fe12%Cr alloy was subjected to high-dose (6 dpa) radiation with 2MeV Fe+ ions to simulate the damage structures caused by neutron radiation, resulting in a damage layer similar to 0.7 mu m in depth from the surface. Spherical nanoindentation, using indenters with radii of 5, 10, and 20 mu m, was used to determine reliable values for the initial yield pressure, the evolution of plastic deformation and the elastic modulus of this material, in the irradiated and unirradiated condition. The results showed that the initial yield pressure within the damage layer can be determined and was approximately a factor of two higher than that of the same material in the unirradiated condition. The irradiated material appeared to display strain softening following yield.