Effects of Copper and Magnesium on Phase Formation Modeling and Mechanical Behavior in AL-CU-MG Alloys

The significant demand for copper and brass in industrial applications, the automotive industry and building industry is increasing; this requires the improvement of their mechanical properties by the addition of suitable alloying elements. The objective of this research is to study the effect of adding various alloys to copper and brass and their effects on their tensile strength, hardness and microstructure. The mechanical properties of two copper alloys and two brass alloys have been characterized in terms of tensile strength, impact strength and Rockwell hardness. The mechanical properties and microstructure of annealed specimens of Cu and brass alloys were observed. The results showed that by increasing the addition of alloys, the tensile strength also increases for both cases. The microstructure of the fracture surface after tensile testing has been examined using an inverted microscope. The experimental result shows that after the annealing at two temperatures of specimens of two copper alloys and two brass alloys, E-Cu shows more ductility than pure copper and C38500 brass alloy shows more ductility, yield strength and tensile strength than brass type 1.

Section: Microstructurementioning

confidence: 99%

Experimental Analysis of Microstructure and Mechanical Properties of Copper and Brass Based Alloys

Jha¹,

Balakumar²,

Paluchamy³

2015

“…The magnesium alloy is characterized as a lightweight material and has high energy absorption capability. Magnesium alloys can naturally withstand impacts effectively because of their unique combination of high tensile strength, low density, and superior shock absorbency which are 100 times greater than that of ordinary aluminum alloys [5,8,9]. Split Hopkinson Pressure Bar (SHPB) was modernized by Herbert Kolsky in 1949 [10,11] and is applicable to high velocity impact for high strain rate testing [2,4,5].…”

Section: Introductionmentioning

confidence: 99%

Improvement of high velocity impact performance of carbon nanotube and lead reinforced magnesium alloy

Abdullah

Abdullah²,

Rahman

et al. 2022

This paper presented the effect of strain rate changes due to Carbon Nanotube (CNT) and Lead addition in Magnesium Alloy, AZ31B on high velocity impact performance. This metal is normally used to fabricate armored vehicle panel. The changing strain will affect the strain rate and had been widely used in automotive applications to accommodate high velocity impact. High strain rate material was applied on the armored vehicle to withstand the impact of the projectile. AZ31B alloy was reinforced with CNT and Lead using Disintegrated Melt Deposition (DMD) method. AZ31B ingots were melted at a temperature of 660 ºC and produced the reinforcement of CNT and Lead during the melting process. Mixed materials were completely inserted into the mold for further process. Microstructure analysis was performed to observe the variance structure of samples. The high velocity impact experiment was performed using a Split Hopkinson Pressure Bar machine. The diameter of the sample was 18 mm with 12.5 mm thickness. The addition of materials such as CNT and Lead into AZ31B had increased the material strain rate. The effect of increasing the strain rate was in line with the increase of energy absorption. The result showed that the strain rate had increased about 30% from the original material, AZ31B and consequently also increased the energy absorption. Thus, the addition of CNT and Lead would increase the strain rate of the original material of magnesium alloy and hence increase the energy absorption capability during impact.

“…The mechanical and electrical properties of the Cu-Ag alloys have been studied during cold working operations and it was found that by adding a percentage of Cr, tensile strength increases whereas electrical conductivity decreases [9]. A research investigated the microstructural behaviour and mechanical properties of copper and brass alloys by the tensile and impact tests and found that during dynamic loading, brass showed a high strength with reduced ductility [10].…”

Section: Introductionmentioning

confidence: 99%

Investigation of micro-structure and mechanical properties of three steel alloys

Jha¹

2017

The significant demands of steel in industrial applications and automotive and building industries are increasing. Thus, there is a need for the improvement of its mechanical properties by adding suitable alloy elements to them so that they have more strengthweight ratio. The objective of this research is to study the effect of adding various alloys to steel material and their effects on tensile and impact strengths, hardness, and microstructure. The tensile test was conducted on a round bar standard specimens of three kinds of steel having different compositions to investigate their mechanical properties. The results of tensile tests are given in tables, based on their stress-strain curves plotted to facilitate the design engineer to know the strength and accordingly design lightweight structures from this material. After the test, the microstructure of the fracture surface was observed using an inverted microscope. The tensile and impact strengths and hardness of carbon steel, EN 8 steel, and mild steel were evaluated and compared based on the chemical composition and microstructural observation. The experimental result showed that the increasing percentage of carbon and silicon in EN 8 steel increased its ultimate tensile and yielded strengths but reduced the percentage elongation compared to carbon steel. Similarly, less content of manganese with an increased content of nickel enhanced the impact strength of the mild steel but slightly reduced the tensile strength and hardness of mild steel compared to EN 8 steel.