A Novel Al‐Rich/Ti–6Al–4V Layered Composite with Superior Wear and Electrochemical Behavior

Abstract

By adding a certain amount of Al to the surface of Ti–6Al–4V (TC4) alloy, a novel layered composite composed of TC4 alloy matrix and Al‐rich alloy is designed and successfully fabricated by a blended elemental powder metallurgy (BE PM) method. The results demonstrated that after the addition of 1 wt% Al, the layered composite exhibits superior wear and electrochemical behavior over powder metallurgy Ti–6Al–4V (PM TC4) alloy, which indicates that a wear‐resistant and corrosion‐resistant layer can be in situ synthesized on the sample surface. Moreover, the volume fraction of α phase, the thickness of α colonies, porosity, Rockwell hardness, and wear resistance of the layered composites increase significantly with Al addition, resulting in the decrease in area, width, and depth of wear tracks, and the reduction of average friction coefficients (COFs). Furthermore, with the addition of Al, the galvanic effect at the interface of α/β phase reduces, whereas the porosity of the layered composites, the chemical activity, and the corrosion rate of α phase increase significantly. Therefore, the corrosion resistance of the layered composites increases first and then decreases with Al addition, and the optimum value can be achieved when the added amount of Al is 1 wt%.

Greenly building strong interactions between epoxy and carbon fiber fabric via vapor assisted ozone

“…Additionally, the high costs associated with these two methods pose limitations to their use in industrial-scale production. [18][19][20][21] Strategies for optimizing the interfacial layer to achieve superior mechanical properties, while addressing issues related to costly reagents and hazardous reaction conditions, should be devised. These strategies should focus on simplifying experimental operations and minimizing the number of additional materials required, thereby hastening the transition from laboratory-scale synthesis to industrial-scale production.…”

Laser‐Directed Energy Deposition Additive Manufacturing of Nickel–Titanium Coatings: Deposition Morphology, Microstructures, and Mechanical Properties

“…[4] With the development of modern industry, the low hardness and poor wear resistance of Ti-6Al-4V are struggling to meet surging performance demand from engineering materials. [5] To improve the surface tribological properties of Ti-6Al-4V components, various ceramic materials (such as TiB, [4] TiB 2 , [6] and TiC [7,8] ) or metal materials (such as Ta, [9] Zr, [10] Nb, [10] and NiTi [11] ) were used to modify the Ti-6Al-4V substrate surface. Notably, NiTi alloys have attracted much attention due to their unique superelasticity, excellent wear resistance, and ability to achieve good interfacial bonding with the Ti-6Al-4V substrate.…”