RETRACTED: Repetitive tube expansion and shrinking (RTES) as a novel SPD method for fabrication of nanostructured tubes

The authors have plagiarized part of a paper that had already appeared in [Mater. Sci. Eng. A, 528 (2011) 3930-3934, 10.1016/j.msea.2011.01.028]. One of the conditions of submission of a paper for publication is that authors declare explicitly that their work is original and has not appeared in a publication elsewhere. Re-use of any data should be appropriately cited. As such this article represents a severe abuse of the scientific publishing system. The scientific community takes a very strong view on this matter and apologies are offered to readers of the journal that this was not detected during the submission process