Helium Bubble Growth in He+ Ions Implanted 304L Stainless Steel Processed by Laser Powder Bed Fusion During Post-Irradiation Annealing at 600 °C
Journal article, 2022
The abundancy of defect sinks in the microstructure of laser powder bed fusion (LPBF) processed austenitic stainless steels was found to be beneficial for helium resistance. In the current study, the influence of the novel microstructure in LPBF processed 304L on the helium bubble growth behaviour was investigated using transmission electron microscopy in samples implanted with He+ ion and post-irradiation annealing treated at 600 °C for 1 h. Two variants of LPBF processed 304L samples were used, one in as-built condition and the other solution-annealed. The comparison between the two samples indicated that the helium bubble growth was inhibited and remained stable in the as-built sample but coarsened significantly in the solution-annealed sample. The sub-grain boundaries and oxide nano-inclusions acted as defect sinks to trap helium atoms and inhibited the growth of helium bubble in the as-built sample under the post-irradiation annealing conditions used.
Laser powder bed fusion
Nano oxide inclusions
Irradiation tolerance
Stainless steel
Helium bubble growth
Author
Hui Liu
University of Shanghai for Science and Technology
Shiling Min
University of Shanghai for Science and Technology
Menglei Jiang
University of Shanghai for Science and Technology
Fuzhong Chu
University of Shanghai for Science and Technology
Ying Li
University of Shanghai for Science and Technology
Zhuoer Chen
Chalmers, Industrial and Materials Science, Materials and manufacture
Kai Zhang
Monash University
University of Shanghai for Science and Technology
Juan Hou
University of Shanghai for Science and Technology
China Nuclear Power Engineering Co., Ltd.
Aijun Huang
Monash University
Acta Metallurgica Sinica (English Letters)
1006-7191 (ISSN) 21941289 (eISSN)
Vol. 35 9 1509-1518Subject Categories
Manufacturing, Surface and Joining Technology
Other Materials Engineering
Metallurgy and Metallic Materials
DOI
10.1007/s40195-022-01391-w