TEM Characterization of Self-ion Irradiation Damage in Nickel-base Alloy C-276 at Elevated Temperature

J. Mater. Sci. Technol. ›› 2012, Vol. 28 ›› Issue (11): 1039-1045.

• High Temperature Structural Materials • Previous Articles Next Articles

TEM Characterization of Self-ion Irradiation Damage in Nickel-base Alloy C-276 at Elevated Temperature

Shuoxue Jin¹⁾, Liping Guo¹⁾, Yaoyao Ren¹⁾, Rui Tang²⁾, Yanxin Qiao³⁾

1) Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China
2) Nuclear Power Institute of China, Chengdu 610041, China
3) Suzhou Nuclear Power Research Institute, Suzhou 215004, China

Received:2012-03-31 Revised:2012-07-04 Online:2012-11-09 Published:2012-11-09
Contact: Liping Guo
Supported by:
the National Basic Research Program of China (No. 2007CB2009800), the National Natural Science Foundation of China (Nos. 11075119 and 11275140), the Fundamental Research Funds for the Central Universities (No. 20102020201000013) and the National Magnetic Confinement Fusion Program (No. 2011GB108009)

Abstract

Abstract:

The microstructure of nickel-base alloy C-276 irradiated at 500 °C with 300 keV self-ions (Ni⁺) to a peak displacement damage of 4.5 displacements per atom was investigated by transmission electron microscopy. Both black spots and dislocation loops were observed. The black spots were identified as small dislocation loops, with a density of (8.2±0.2)×10¹⁵ cm^-3 and the average loop size of about 15 nm. An increase of dislocation loop density would lead to the increase of the hardness in C-276 alloy, and the increment in yield strength was estimated by the dispersed barrier-hardening model. In [110] orientation, Burgers vectors of the dislocation loops were determined, and it was found that they were predominantly (a/2)<110>. In contrast to other nickel-base alloys, no voids were observed in C-276 alloy after being irradiated at elevated temperatures.

Key words: Irradiation damage , Transmission electron microscopy (TEM) , Nickel-base alloy C-276 , Super-critical water reactors

Shuoxue Jin, Liping Guo, Yaoyao Ren, Rui Tang, Yanxin Qiao. TEM Characterization of Self-ion Irradiation Damage in Nickel-base Alloy C-276 at Elevated Temperature[J]. J. Mater. Sci. Technol., 2012, 28(11): 1039-1045.

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TEM Characterization of Self-ion Irradiation Damage in Nickel-base Alloy C-276 at Elevated Temperature

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