Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10142036 | Materials Science and Engineering: A | 2018 | 25 Pages |
Abstract
The effects of Ultrasonic Nanocrystal Surface Modification (UNSM) on the gas nitriding behavior of Ti6Al4V alloy have been investigated. Gas nitriding was performed at 700 and 800â¯Â°C. The microstructure after UNSM and gas nitriding was characterized using X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Microstructural investigations revealed the formation of an approximately 10â¯Âµm thick severe plastic deformation layer as well as nano-grains after UNSM treatment. The UNSM-treated Ti6Al4V alloy formed 0.26â¯Âµm and 1.35â¯Âµm thick nitride layers after nitriding at 700â¯Â°C and 800â¯Â°C, respectively, and UNSM resulted in an increased layer thickness relative to untreated samples at both temperatures. The results suggest that nitrogen adsorption and reaction capability were enhanced in the UNSM-treated Ti6Al4V alloy. This enhancement can be attributed to high-density dislocations and grain boundaries that were introduced by UNSM and served as efficient channels for nitrogen diffusion.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Jun Liu, Sergey Suslov, Azhar Vellore, Zhencheng Ren, Auezhan Amanov, Young-Sik Pyun, Ashlie Martini, Yalin Dong, Chang Ye,