Tribological behavior of Fe₇₀Ni₃₀ alloy with nanoscale twins under liquid paraffin lubrication

Abstract

Fe 70 Ni 30 alloy with nanoscale twins was obtained by deep cryogenic treatment (DCT) of coarse grained Fe 70 Ni 30 alloy (CG-Fe 70 Ni 30 ) at liquid nitrogen temperature. The tribological behavior of DCT-Fe 70 Ni 30 alloy was investigated under liquid paraffin oil lubrication compared with that of CG-Fe 70 Ni 30 alloy. The experimental results showed that the wear resistance of DCT-Fe 70 Ni 30 alloy was improved significantly after the introduction of nanoscale twins, and DCT-Fe 70 Ni 30 alloy also showed a little lower friction coefficient relative to CG-Fe 70 Ni 30 alloy. The results indicated that twins play a positive role in the material's friction-reduction and anti-wear properties, which is attributed to the better oil-adsorption ability and enhanced hardness of DCT-Fe 70 Ni 30 alloy caused by structural refinement. Wear mechanisms were discussed.

Friction and wear behavior of nanoeutectic Fe1.87C0.13 under air and vacuum conditions

“…[1][2][3][4][5][6] In recent years, the tribological behavior of nanostructured materials related to the effect of grain size, hardness, or strength has been studied extensively. [7][8][9][10][11][12][13] Generally, nanostructured materials have higher hardness and strength than their coarse grained counterparts, which is beneficial to the wear resistance. Lu et al 14 produced nanoscale twins on the surface of Cu by surface mechanical attrition treatment (SMAT), and improved the wear resistance markedly.…”

B-Spline Collocation Simulation of Non-Linear Transient Magnetic Nanobio-Tribological Squeeze-Film Flow

“…(s)(16) as a function (f s ; s=1, 2, 3) of the independent variable, , and the function z(w), under the boundary conditions (11a-11b), we obtain the desired numerical solution. The method of spline collocation at Gaussian points using a B-spline basis has been implemented to calculate the B-splines and their derivates.…”