Evolution of dislocation microstructure in irradiated Zr alloys determined by X-ray peak profile analysis

Abstract

During neutron irradiation of metals, owing to the enhanced number of vacancies and interstitial atoms, the climb motion of dislocations becomes significant at room temperature, leading to a recrystallization of the material. Moreover, the vacancies and interstitial atoms tend to form prismatic dislocation loops that play a crucial role in the plastic properties of the materials. X-ray peak profile analysis is an efficient nondestructive method to determine the properties of dislocation microstructure. In the first half of this article, the foundation of the asymptotic peak broadening theory and the related restricted-moments peak-evaluation method is summarized. After this, the microstructural parameters obtained by X-ray peak profile analysis are reported for irradiated E110 and E110G Zr alloys used as cladding material in the nuclear industry.

Research on densification mechanism of Inconel 718 alloy miniature gear by electric field-assisted sintering

“…when n=3.5, the sintering is in the state of high sintering stress, which occurs in the later stage of the densification process. At this time, the densification rate of the Inconel 718 alloy sample gradually decreases, and the densification process is mainly controlled by the dislocation climbing mechanism in the steady-state creep model [10].…”