A study on wear behavior of TiN/AlCrN multilayer coatings at high temperature testing conditions

Abstract

Nitride coatings are generally used to enhance the surface property of the materials in order to perform wear and sliding environments to provide resistance against wear. Titanium Nitride coatings and Aluminium Chromium Nitride coatings were deposited as multilayer over the SS316L surface and the tribological studies were performed at high and room temperatures. The hardness of the multilayer coatings (TiN/AlCrN) provides 1000 VHN which is around five times higher than that of SS316L. The various wear mechanisms have been found from SEM morphology of worn surfaces for the different loading conditions at a high temperature of 400 °C. Chemical reactions led to the different wear mechanisms which were due to the thermal influence of the testing. Oxidation resistance was found for the elevated testing condition and the oxide formations were restricted with the elements of Ti, Cr, Fe, and Al, unlike room temperature testing.

A comparison of wear between unidirectional and reciprocating sliding motions under different applied loads and lubricants

“…Tribological research is of great significance for exploring new lubricant and wear-resistant materials and selecting suitable tribo-pairs. Currently, most of the research focuses on the tribology under special conditions, such as vacuum [1], high temperature [2][3][4], heavy load [5], high speed [6][7][8][9], etc, or the tribology of new materials, such as super-lubricant materials [10], 2D nanomaterials [11], diamond-like carbon (DLC) coatings [12][13][14], etc. However, less attention is paid to the wear difference between reciprocating sliding motion (RSM) and unidirectional sliding motion (USM) in the friction system, which increases the difficulty for selecting suitable lubricants or judging the wear resistance of materials as the wear mechanism of two sliding motions is not clear.…”

Investigation of corrosion behavior on plastically deformed aa 7075 t651 by shot peening process

“…Compressive factor of residual stress was measured availing sin 2 Ψ method [25]. The XRD peaks of the specified specimen are depicted in detail in With the addition of residual (compressive) factor and hardness, the impeding of dislocations surges along the grain boundaries causing a major contributor to the passive layer formation along the surface aiding the surge in corrosion resistance in the peened AA 7075 T651 sample.…”