Jiajun Liu

TL;DR: In this paper, a series of plasma nitriding experiments were carried out for commercial titanium (UNS R50400/Gr. 2/TA2/CP3) at various temperatures ranging from 650 to 950 °C for 8h to investigate the effects of nit riding temperature on microstructures and mechanical properties.

TL;DR: In this article, an ultrafine-grained (UFG) deformation layer with a thickness of 200μm was produced on the USRP Ti, and its mean surface grain size was refined to about 38nm from 45μm.

TL;DR: In this paper, a modification layer with a depth of 350 lm was formed by ultra sonic cold forging technology (UCFT) on AISI D2 surface, and a series of plasma nitriding experiments for both treated and untreated samples were conducted at various temperatures ranging from 350 C to 550 C for 4 h.

TL;DR: In this article, the authors used X-ray photoelectron spectroscopy (XPS) to analyze the tribological properties of 316L stainless steel (LSS) treated by ultrasonic cold forging technology (UCFT) which is one of the methods of surface nanocrystallization.

TL;DR: In order to further enhance the tribological properties of TiN coatings used on mechanical parts, W ion implantation with Metal Vapor Vacuum Arc (MEVVA) source was carried out on PVD TiN coating at the implantation dose as high as 9.