Study on Wear Resistance of Ti-6Al-4V Alloy Composite Coating Prepared by Laser Alloying

Abstract

Titanium alloy has extensive applications in numerous fields, such as in aerospace, shipbuilding, petrochemical, and bio-medical. However, under the condition of high temperature (above 700 °C), it is difficult to meet the requirements of the performance of the turbine blades, piston rings, valves, etc. In this paper, the alloy powder is composed of Ni60A, TiN, Al, and Si in accordance with the proportion of 1:3:4:2 (mass ratio), and the composite coating, such as TiN, TiB, Ti5Si3, and Al3Ti were synthesized on Ti-6Al-4V alloy by Yttrium Aluminium Garnet(YAG) laser. The friction and wear experiments were carried out on Ti-6Al-4V alloy and alloyed coatings at different loads (3N, 6N, 9N), and different temperatures (25 °C, 350 °C, 700 °C). The impact of load and temperature on wear performance were analyzed by analyzing the friction traces. The results showed that the abrasion loss, wear width, and depth, wear volume, and wear ratio of the alloyed coatings were less than Ti-6Al-4V alloy, and the surface of furrow was shallow and the wear was less. However, under high temperature conditions, the alloy coating wears worse than Ti-6Al-4V alloy, and the high temperature wear resistance is not ideal.

Effect of Laser-Textured Surface of Ti6Al4V on Frictional Wear Behavior

“…This indicates the WR is improved by 86.96% compared to untextured because of surface oxidation, as reported by Molinari et al [15]. The final period corresponds to the stabilization of the friction coefficient [18], and there was no more pre-wear period. As shown in Figure 12, the improvement of wear rate is 37% for laser textured surfaces compared to untextured surfaces, and the COF significantly drops by 8.2%.…”

“…The analysis of these results distinguishes several periods (phases) on successive regimes of friction and wear behavior [1]. From Figure 10, (1) the first period is the accommodation (or pre-wear period) in the first 10 seconds when the coefficient of friction goes up instantly because the surface of both surfaces is the most flexible [18]. Plastic deformation smooths out the surface and makes it less rough.…”

Wear behaviour of titanium based composites reinforced with niobium pentoxide in saline and acidic environments

“…12 ). The wet media could serve as a lubricating layer between the CpTi and Ti–Nb 2 O 5 surfaces and that of the ball counterface, thereby reducing the available amount of abraded material from the test samples [ 9 ]. This can also result in less plastic shearing during contact with the counterface – hence less surface adhesion, as in the case of both wet environments, compared with the dry environment where more surface roughness is noted.…”

“…Chen et al [ 9 ] investigated the friction and wear performance of Ti–6Al–4V reinforced with Al, TiN, Ni60 A, and Si powders in the ratio of 4:3:1:2 to meet the performance requirements expected of turbine blades, piston rings, and valves. The composites were coated with TiN, TiB, Ti5Si 3 , and Al 3 Ti, and the tests on friction and wear were conducted at three specific loads of 3, 6, and 9 N as well as three different temperatures of 25, 350, and 700 °C.…”

Characterization of Titanium Alloy Obtained by Powder Metallurgy

“…However, the high friction coefficient and lower wear resistance than steel and Ni -based alloys have been a major drawback to its practical applications [ 21 , 22 ]. In this context, the addition of small quantities of metals, such as: Al, Sn, Mn and Fe, leads to improved wear resistance, while reducing manufacturing costs.…”