B2-NiAl Strengthened PH 13–8 Mo Steel Under Fe+ Ion Irradiation: Precipitate Stability and Interaction with Damage Defects
Year: 2025
Type: article
Abstract: at room temperature with maximum damage up to 8 dpa. The pre- and post-irradiation samples are examined with selected area electron diffraction (SAED), scanning transmission electron microscopy (STEM) and Energy Dispersive Spectroscopy (EDS). Before the irradiation, B2 NiAl precipitates are uniformly distributed in matrix with increased sizes of 2.5, 4.9 and 8.1 nm. After the irradiation, the intensity of SAED superlattice pattern of B2 NiAl with 8.1 nm diminishes rather than disappeared in the remaining samples, indicating that the ordered B2 structure of NiAl precipitates of smaller size are mostly destroyed. EDS results proves that no elemental diffusion took place between the precipitates and matrix. Moiré fringes are found to be located beside dissolved precipitates attributed to radiation-enhanced diffusion. This work will provide advice for the material design of other intermetallic strengthened alloys especially in nuclear applications.
Source: Materials
DOI: 10.3390/ma18245524
Authors: Zijing Huang, Roudi Yang, Ming Chen, Yiting Ding, Chenglu Liu, Jiahan Zhang, Binghang Li, Ce Zheng
Institutions: Xiamen University, Northwestern Polytechnical University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,137
OpenAlex ID: W4417156326