Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7967216 | Journal of Nuclear Materials | 2014 | 4 Pages |
Abstract
Irradiation of dilute Cu-W alloys with 1.8 MeV Kr+ between 300 K and 573 K is found to induce nucleation of a high density of W nano-precipitates. HRTEM and aberration-corrected STEM reveal that the â¼3 nm precipitates have a preferred orientation relationship with the matrix. A variant of the Bain relationship exists with preferred alignment occurring along Cuã2 2 0ã || Wã010ã, with small angular differences amongst the particles, which is compensated by interfacial dislocations or strain. The formation mechanism for such an orientation relationship is rationalized on the basis that small W clusters form within the local melt of an energetic displacements cascade, resulting in the partial alignment of the nanoprecipitates with the Cu lattice as the Cu solidifies.
Related Topics
Physical Sciences and Engineering
Energy
Nuclear Energy and Engineering
Authors
Kaiping Tai, Robert S. Averback, Pascal Bellon, Nhon Vo, Yinon Ashkenazy, Shen J. Dillon,