The effect of surface temperature and particle size on mechanical properties during accumulative roll bonding of Al 1050-H4 aluminum alloy

Pita, M.; Mashinini, Peter Madindwa; Tartibu, Lagouge K.

doi:10.1109/icmimt49010.2020.9041231

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…Hardness Test. Mechanical properties of material play a vital role for structural applications [10,11]. As such, the 2 and 3 are graphically shown in Figure 2.…”

Section: Resultsmentioning

confidence: 99%

Investigating the Effect of Cooling Media on Hardness, Toughness, Coefficient of Friction, and Wear Rate of Mild Steel Heat Treated at Different Temperatures

Pita

Lebea

2022

Material Design & Processing Communications

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Mild steel is a common material used extensively in the manufacturing industry. This manuscript investigates the effect of cooling processes on the hardness, toughness, coefficient of friction, and wear rate of mild steel heat treated at different temperatures. The material was heat treated in a furnace at two different temperatures (500 and 900°C) and cooled by water, oil, and air. Microhardness and impact tests were conducted using ASTM E384 and ASTM E23-12C. For dry conditions, the tribology ASTM G99 test standard was used to determine the coefficient of friction and wear rate per sample. The results show that mild steel heat treated at 900°C and cooled with water increased the material’s hardness by 24% and toughness by 23.3% as compared to oil- and air-cooling media. The same heating temperature and water-cooling media produce the material with a low wear rate (3.223E-008).

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“…Hardness Test. Mechanical properties of material play a vital role for structural applications [10,11]. As such, the 2 and 3 are graphically shown in Figure 2.…”

Section: Resultsmentioning

confidence: 99%

Investigating the Effect of Cooling Media on Hardness, Toughness, Coefficient of Friction, and Wear Rate of Mild Steel Heat Treated at Different Temperatures

Pita

Lebea

2022

Material Design & Processing Communications

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“…Similar results were reported by the following researchers. The Hall-Petch relationship explains that fine grains produced by ARB increase the material hardness [15]. Material particle size decreased after the first ARB cycle enhanced the material properties [2].…”

Section: B Microhardnessmentioning

confidence: 99%

Investigating the Effect of Al- 1050-H4 Sample Position on Grain Size and Mechanical Properties During Accumulative Roll Bonding Process

Pita¹,

Sob²

2022

IJETAE

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— Nanocrystalline material polycrystals with grain sizes less than 100 nm—have the unique mechanical properties highly desirable for a wide range of applications. This paper compares the microstructure, grain sizes and hardness of top and bottom Al 1050-H4 rolled samples through an accumulative roll bonding process. The samples were rolled once at the speed of 9 rpm and an applied load of 5 ton. Rolled samples were characterised by optical microscopy and a linear intercept method based on the ASTM E122-12 standard was followed. The hardness test was performed on both samples following the ASTM E384 test standard. Simulation was performed using an Auto Desk Inventor and the mesh sizes of the samples were correlated with their grain sizes to analyse the material properties during the accumulative roll bonding (ARB). The obtained results show more property enhancement under the applied load and strain during the ARB process. The bottom sample was more refined and had higher mechanical properties (hardness) compared to the top sample. The average grain size of the bottom sample was 42.6 µm , and 47.6 µm for the top sample. The hardness results were 51.28 HV for the bottom sample and 42.08 HV for the top sample. From the simulation, it was observed that the elongation was useful, without any possibility of material failure in both 42.6 µm and 47.6 µm microstructural analyses. It was also observed that the elongation during the ARB process occurred without any material defects during the grain refining process. The length of the elongation during the ARB process was also revealed during the simulation process. . Keywords—ARB, properties, elongation, material, samples.

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“…During the monotonic deformation of conventional materials to nanomaterials, the material grain size decreases. e decrease in material grain size brings about an increase in the material's properties [6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Annealing on the Microstructure, Hardness, Electrical Conductivity, and Corrosion of Copper Material before Accumulative Roll Bonding Processes

Pita

Lebea

2022

Journal of Engineering

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Copper is one of the first metals to ever be mined and used by humans, and since the dawn of civilization, it has made important contributions to behavioral science. The exploration of copper has provided knowledge of nonfuel minerals and has consequently improved society. The objective of this paper is to investigate the effect of annealing on the microstructure, mechanical properties, and corrosion of copper material before undergoing an accumulative roll bonding process (ARB). The material was heated to 600°C and cooled with water before being rolled by a two-roller rolling machine. The second ARB experiment was conducted on copper material without annealing. The samples were characterized by a light microscope (LM). The ASTM E384 test method was followed during the hardness test. The results show that annealing and applying two passes of the ARB process reduce the grain size by 37%, which is significant. It also increases copper hardness by 65% and increases its electrical conductivity by 2.6%. Additionally, the results show that the open circuit potential during the first pass heated sample was −0.07237 V; this increased by 22.16% with the second pass heated sample.

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The effect of surface temperature and particle size on mechanical properties during accumulative roll bonding of Al 1050-H4 aluminum alloy

Cited by 5 publications

References 15 publications

Investigating the Effect of Cooling Media on Hardness, Toughness, Coefficient of Friction, and Wear Rate of Mild Steel Heat Treated at Different Temperatures

Investigating the Effect of Cooling Media on Hardness, Toughness, Coefficient of Friction, and Wear Rate of Mild Steel Heat Treated at Different Temperatures

Investigating the Effect of Al- 1050-H4 Sample Position on Grain Size and Mechanical Properties During Accumulative Roll Bonding Process

Effect of Annealing on the Microstructure, Hardness, Electrical Conductivity, and Corrosion of Copper Material before Accumulative Roll Bonding Processes

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