Excellent corrosion resistance and hardness in Al alloys by extended solid solubility and nanocrystalline structure

Abstract

Development of ultra-high strength and corrosion-resistant aluminum (Al) alloys is demonstrated by a combination of suitable alloying elements and processing technology able to cause extended solid solubility and nanocrystalline structure. Binary Al-transition metal (M: Cr, Ni, Mo, Si, Ti, Mn, V, Nb) alloys, produced by high-energy ball milling and subsequent cold compaction, have exhibited significantly high hardness and corrosion resistance compared to any commercial Al alloy. The cyclic potentiodynamic polarization tests revealed a significant improvement in pitting and repassivation potentials. X-ray diffraction analysis revealed the grain refinement < 100 nm and extended solid solubility. IMPACT STATEMENT High-energy ball-milled Al alloys, owing to excellent corrosion resistance and high hardness, are expected to be a new class of Al alloys and initiate a multidisciplinary research direction.

Effect of 4 Wt% Magnesium on The Micro-hardness Of Aluminum Alloy Synthesized by Mechanical Milling

“…With the increase in grinding (12-18 h), it is observed that the parameter continues to increase, tends to expand the crystalline network of Al, until 24 h where the parameter remains constant, suggesting that Mg has completely entered the Al lattice. The analysis of the phase quantification confirms the results of the lattice parameter, where at 6 h, the largest amount of Mg in the Al lattice [6].…”

Analysing the Mechanical Properties and Corrosion Phenomenon of Reinforced Metal Matrix Composite

“…The NaCl solution prepared by dissolving 30gm NaCl in one litre water. The specimens for the tests were cut to size 20x20x 6 mm, after which the sample surfaces were polished with emery paper starting from 120 grit down to 640 grit size [19][20][21] .…”

“…The Brinell hardness test is carried out to get to know the effect of the A6061 on the composites generated (Graphite, aluminium oxide, silicon carbide and boron carbide) in matrix material. The polished specimens were tested with the HBW micro durability tester and the values are depicted and shown below in Table 1 [16][17][18][19][20][21] . here the higher percentage (5%) gives a positive sign of hardness property in the prepared sample [18][19][20][21] .…”

“…The polished specimens were tested with the HBW micro durability tester and the values are depicted and shown below in Table 1 [16][17][18][19][20][21] . here the higher percentage (5%) gives a positive sign of hardness property in the prepared sample [18][19][20][21] . The values are depicted in the Table 3.…”

“…The impact of connected speed on the wear conduct of Al6061 combination and its composites is appeared in the Figure 4. The volumetric wear loss is rising as the typical load increments from 100RPM to 600RPM [17][18][19][20][21] . The wear rates of the prepared samples of 4% and 5% are shown in the Table 4.…”