Xiaoxin Ye

RETRACTED: Effect of electropulsing treatment and ultrasonic striking treatment on the mechanical properties and microstructure of biomedical ti-6Al-4V alloy

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the Editor-in-Chief. The authors have reused figures and text that have already appeared in their previous articles. Figure 6a duplicates figure 6a (horizontally flipped) in Reference [1], while figure 6c duplicates figure 6c in Reference [1] and figure 3c in Reference [2] (albeit different scale is reported for each of these three figures). Figure 7 duplicates panels from figure 9 in Reference [3]. The article also duplicates parts of the text that appeared in Reference [1]. 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 an 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. Journal records indicate that confirmation of the submission and publication of the article was sent to the first author’s email address but not to the corresponding authors email address. References [1] Surf Coat Tech 258 (2014) 467-484, http://dx.doi.org/10.1016/j.surfcoat.2014.08.052. [2] J Alloys Compd 616 (2014) 173-183, http://dx.doi.org/10.1016/j.jallcom.2014.07.143. [3] J Mater Res 29 (2014) 1500-1512, http://dx.doi.org/10.1557/jmr.2014.171.

RETRACTED: Mechanical properties and phase transition of biomedical titanium alloy strips with initial quasi-single phase state under high-energy electropulses

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the Editor-in-Chief. The authors have reused figures and text that have already appeared in their previous articles. Figure 4 duplicates figure 4 in Reference [1], figure 6 in Reference [2], figure 8 in Reference [3] and figure 4 in Reference [4], while Figure 7a-b duplicates figure 7a-b in Reference [4]. The article also duplicates significant parts of the text that appeared in References [1] and [4]. 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. As such this article represents an 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. Journal records indicate that confirmation of the submission and publication of the article was sent to the first author’s email address but not to the corresponding authors email address. The corresponding author and the first author wish to mention that the co-author Zion T.H. Tse was not involved in the preparation and handling of this article. He was not informed about the publication nor granted the use of his name and affiliation in the publication. References [1] J Mater Res 30 (2015) 206-223, http://dx.doi.org/10.1557/jmr.2014.367. [2] Mat Sci Eng A 622 (2015) 1-6, http://dx.doi.org/10.1016/j.msea.2014.11.003. [3] J Mater Res 29 (2014) 1500-1512, http://dx.doi.org/10.1557/jmr.2014.171. [4] Adv Eng Mater 17 (2015) 995-1007, http://dx.doi.org/10.1002/adem.201400273.

Effects of electropulsing cutting on the quenched and tempered 45 steel rods

Electropulsing is introduced into the cutting process for quenched and tempered 45 steel, which is a novel method to improve the material machinability compared with the conventional cutting process. The effects of electropulsing on cutting performances, microstructure evolution, and surface qualities of 45 steel rods were studied. The results indicate that electropulsing is beneficial for the cutting process in 3 aspects as follows: (1) reducing the principal cutting force, surface microhardness and surface roughness of the machined sample dramatically; (2) improving the machining efficiency and prolonging the life of cutting tools; (3) decreasing the thickness of rheological layer which was usually caused by work hardening in the cutting process. The morphology and microstructure of the cutting chips showed that the length of the chips increased significantly with the increase of the current density. The advantage of electropulsing is that it can improve the plastic deformation capability as well as increase the lubricating property between the specimen and the cutting tool.

Surface nanocrystallization of C45E4 steel by ultrafast electropulsing-ultrasonic surface treatment

The effect of high-energy electropulsing-ultrasonic surface treatment (EUST) on the surface properties and the microstructure evolution of C45E4 steel was investigated. Refined microstructure and reduced surface roughness were obtained owing to the surface nanocrystallization process. Compared with the ultrasonic surface treatment (UST), the impact depth of the surface strengthened layer was increased by 40% to 700 μm after EUST. The average grain size of the surface nanocrystallization layer was reduced to 30-50 nm. The surface roughness of the C45E4 steel was reduced to 0.25 μm, and the surface microhardness was dramatically enhanced to 460 HV. The improvement of microstructure and micro-hardness at ambient temperature was likely attributed to the acceleration of atomic diffusion and the enhancement of plastic deformation ability in the surface strengthened layer under the influence of electropulsing. Due to the electropulsing-assisted ultrasonic strengthening effect, the surface nanocrystallization in this ultrafast procedure was noticeably enhanced.