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Roller burnishing (RB) is a finishing treatment method that is used to impart certain physical and mechanical properties, such as surface roughness, improved visual appearance, or increased corrosion, friction, wear, and fatigue resistance. The purpose of this paper is to study, the influence of RB on corrosion resistance in A53 steel in HCl solution.

Microhardness (MH), microstructure, weight loss, and potentiostatic polarization are investigated at pressing forces of 40, 60, 80, 100 and 120 N.

MH increases with increasing the applied force and the percentage improvements are found to be 12, 24, 28, 35 and 65 percent for 40, 60, 80, 100 and 120 N RB pressing forces, respectively. Weight losses, in general, showed an optimum value at about 80 N. Corrosion potential and corrosion current decrease with increasing pressing force and reached a minimum at about 80 N, then begin to increase with increasing RB force.

The results present in this paper are important to the understanding of the effect of the surface plastic deformation methods on surface properties and corrosion resistance in steel.

The purpose of this paper is to investigate the influence of mechanical surface treatments on the surface layer properties and the fatigue performance of the aircraft alloys Al 7075‐T73 and Ti‐6Al‐4V

Laser peening without coating (LPwC), shot peening (SP), ultrasonic shot peening (USP) and ball burnishing (BB) were applied and the resulting changes in surface roughness and residual stress‐depth profiles were evaluated. Fatigue performance of both alloys was tested in rotating beam loading (R=−1) on hourglass‐shaped specimens and the results were compared with the electrolytically polished (EP) reference conditions.

All studied mechanical surface treatments led to pronounced increases in fully reversed fatigue lives and fatigue strengths in both Al 7075‐T73 and Ti‐6Al‐4V.

To the authors' knowledge, this is the first paper that compares fatigue performance of a wide variety of mechanically surface treated conditions in two aircraft alloys.

The purpose of this paper is to analyze and optimize the roller burnishing process parameters using the design of experiments and grey relational analysis (GRA).

In this experimental work, the carbide burnishing tool has been selected for the machining of AISI-1040 high carbon steel to get better product quality and satisfactory machining characteristics. The material surface condition while machining, burnishing tool speed, feed rate, depth of penetration and No. of passes have been selected as process constraints to conduct experimental trials.

The surface roughness (SR) and surface hardness were considered as output responses. The experimental outcomes optimized by multi-parametric optimization showed considerable improvement in the process. The roller speed and number of passes are the most significant parameters for surface hardness, whereas the surface condition and roller penetration depth have the most significance on SR.

The GRA method shows the 0.03376 improvement in grey relational grade between the experimental values and the predicted values.

The experimental outcomes optimized by multi-parametric optimization showed the considerable improvement in the process and will facilitate steel industries to enhance and improve productivity while burnishing high carbon steel (AISI-1040).

This research represents valid work, and the authors have no conflict of interests.

This paper aims to investigate and deliver experimental evidence to establish ball burnishing (BB) as an effective procedure for processing fused filament fabricated parts (FFF). This study, which is a novel contribution to applying BB on FFF parts of materials with different properties, demonstrates the validity of this technology on polymers and provides generalizations for its implementation.

A BB tool has been designed and validated. Statistical models have been used to determine the process parameters that provide the best results. In addition, the process’ impacts on the dimensional accuracy, quality, hardness and mechanical performance of the treated parts under static bending and fatigue testing have been quantified and compared to the untreated samples.

This study shows the best combination of process parameters for two printing orientations which have been decisive in obtaining successful results. These positive results allow stating procedure guidelines and recommendations for use in the industrial environment.

This paper fulfills an identified need to enhance FFF parts' surface and mechanical properties, as more experimental evidence of studies demonstrating this technology's validity in additive manufacturing is yet to be found.

The purpose of this paper is to review, analyze and present the effects of the roller burnishing process on pure aluminum alloyed by pure copper at 3%, 6% and 9% percentages. Roller burnishing is one of the effective finishing treatment methods in terms of stabilization of surface layers properties along the depth, Roller burnishing is one of the effective methods used to improve the surface layer properties such as microhardness and average surface roughness.

Three different Al‐Cu alloys of 3%, 6% and 9% copper additions were prepared and microstructure, micro hardness and mechanical properties investigated. Then the roller burnishing mechanism was applied on Al‐Cu alloys on cylindrical work pieces, different conditions were used, and the results were obtained and discussed.

The best enhancement in hardness was 46.4% which was achieved at 9% Cu addition, whereas the best enhancement in the flow stress was 101.8% which was achieved at 9% Cu addition. Applying burnishing force 100 and 150 N resulted in an enhancement in the micro hardness of 80% and 102.8%, respectively, in the Al‐Cu% alloy, where the maximum enhancement on the surface roughness was 61% that resulted in pure Al when applying 150 N burnishing forces. Finally it was found that pure aluminum has the highest wear resistance.

This is new work on Al‐Cu alloys, thus the results after implementation of roller burnishing process are of great value and add an extra enhancement in the surface quality.

This paper seeks to investigate the effect of roller burnishing on the surface roughness and hardness of Zn−5% Al alloyed by copper at varied percentages.

Copper was added to molten Zn−5%Al cast alloy at different percentages, then the roller burnishing process with different parameters was carried out on the five Zamac5−Cu alloys, however the effect on the surface roughness and hardness was investigated.

It was found that there is an enhancement on the hardness and the maximum is 18 per cent in Zamac5−10% Cu alloy. The best surfaces result was 0.05 μm that obtained at 0.04 mm rev ⁻¹ burnishing feed rate in Zamac5−10% Cu alloy.

The addition of copper is recommended to be added to Zamac5 up to percentage of maximum solubility of copper in Zamac5 alloy.

In this study, two postprocessing techniques, namely, conventional burnishing (CB) and ultrasonic-assisted burnishing (UAB), were applied to improve the fatigue behavior of 316 L stainless steel fabricated through selective laser melting (SLM). The effects of these processes on surface roughness, porosity, microhardness and fatigue performance were experimentally investigated. The purpose of this study is to evaluate the feasibility and effectiveness of ultrasonic-assisted burnishing as a preferred post-processing technique for enhancing the fatigue performance of additively manufactured components.

All samples were subjected to a sandblasting process. Next, the samples were divided into three distinct groups. The first group (as-Built) did not undergo any additional postprocessing, apart from sandblasting. The second group was treated with CB, while the third group was treated with ultrasonic-assisted burnishing. Finally, all samples were evaluated based on their surface roughness, porosity, microhardness and fatigue performance.

The results revealed that the initial mean surface roughness (Ra) of the as-built sample was 11.438 µm. However, after undergoing CB and UAB treatments, the surface roughness decreased to 1.629 and 0.278 µm, respectively. Notably, the UAB process proved more effective in eliminating near-surface pores and improving the microhardness of the samples compared to the CB process. Furthermore, the fatigue life of the as-built sample, initially at 66,000 cycles, experienced a slight improvement after CB treatment, reaching 347,000 cycles. However, the UAB process significantly enhanced the fatigue life of the samples, extending it to 620,000 cycles.

After reviewing the literature, it can be concluded that UAB will exceed the capabilities of CB in terms of enhancing the surface roughness and, subsequently, the fatigue performance of additive manufactured (AM) metals. However, the actual impact of the UAB process on the fatigue life of AM products has not yet been thoroughly researched. Therefore, in this study, this paper used the burnishing process to enhance the fatigue life of 316 L stainless steel produced through the SLM process.

Acal Electronics Ltd. has introduced a new range of custom designed and integrated panels, data entry keyboards, and combination lighted assemblies for military and commercial applications. This new range is available exclusively in the UK from Acal. Manufactured by Jay‐El, the panel indicators and keys may be sunlight readable (SLR) and night vision compatible (NVG) allowing operation in environments ranging from total darkness to bright sunlight. Offering designers a unique service, these customised products are available at surprisingly short delivery times of 12–14 weeks and at competitive prices. Designed to meet military specifications the panels are both rugged and reliable.

IT would be quite refreshing to have an open breeze blowing through the ranks of work study technicians these days. Away with the ponderous exponents of the mystic art and, instead, finding the experts telling the workers how easy work study really is if only you sit down and think about it. It has, of course, many difficult and complex aspects but let us not confuse the issue, since these aspects can be left to the professionals' — after all that is what they get paid for — sorting out and providing solutions to the problems!

POROUS metal bearings are produced by partial compaction of metal powders in precision tools of the desired shape followed by the sintering of the powder compact in a reducing atmosphere at a temperature of about 80% of the absolute melting point of the metal. The sintered compact is repressed to restore dimensional accuracy, to produce a high surface finish and, by work hardening, to increase the elasticity. The amount of porosity depends mainly upon the degree of compaction of the powder, and does not change greatly during the subsequent sintering and repressing operations, whereas the size of the pores depends upon the particle size of the powder and the subsequent processing. Finally the porosity is impregnated with lubricating oil.