Material Selection For Drive Shaft Engineering Essay

Material Selection For Drive Shaft Engineering EssayThe drive radiotherapy is a rod or tube apply to carry rotational force from the engine to the four bladed fans to provide sufficient airflow to visit the temperature of the pump and the generator to a sufficient level when they both are working at maximum output and operating in an ambient temperature of up to 50C.In this selection of the terzetto different materials, there are compared based on different properties to choose the suitable material to be used for the drive shaft.http//media.noria.com/sites/archive_images/articles_200711_Case_-Study-Figure5.gifFigure 1- Fan and motor assembly with belt drive3.1 atomic number 13 Alloy3.1.1 IntroductionAluminum Alloy is a moderate to utmost strength heat treated misdirect with higher strength than 6005A. It is commonly used for heavy-duty structure in the railway coach, truck frames, shipbuilding, and bridges the military, aerospace applications including meat cleaver rotor sh ell, tubes, pylons and towers, transportation, boiler making, motorboats and rivets 1.3.1.2 Grade 6061-T6It has very good wearing resistance and excellent weld ability although reduced strength in the weld zone. It has medium fatigue strength. It has good cold formability in temper T4, but limited in temper T6. Not suitable for very complex cross parts.T6- closure heat treated and artificially agedSupplied forms- ExtrusionsLight weight very good corrosion resistanceBritish/ ISO threadbareAA 6061-T6 elastic Yield fortissimo (MPa)310Shear Strength (MPa)190Proof Stress (MPa)270Elongation over 50mm (%)12Hardness Vickers (HV)100Density (kg/m)2700 caloric Conductivity (W/m.K)166thawing Point ( C )650Electrical Resistivity (.m)0.040 x 10Table 1- property for aluminum Alloy Grade 6061-T63.2 unsullied Steel3.2.1 IntroductionStainless vane is also known as grades 304 and 304L respectively. Stainless steel 304 is the most versatile and wide used. Type 304 harmless steel are austenitic grades elicit be severely deep drawn. This property has led 304 became the dominant grade used in applications such as sink and cook.3.2.2 Grade 304Type 304 stainless steel is an austenitic grade that atomic number 50 be severely deep drawn. This property has resulted in 304 being the dominant grade used in applications handle sinks and saucepans and has excellent corrosion resistance in many environments and when in contact with different corrosive media. Pitting and crevice corrosion can occur in environments containing chloride. Pressure corrosion cracking can occur above 60C.Good machinabilitySupplied forms- Strip barExcellent corrosion resistanceBritish/ ISO StandardBS 970 Grade 304Tensile Yield Strength (MPa)520 to 720Compressive Strength (MPa)210Proof Stress (MPa)210Elongation over 50mm (%)45Modulus of elasticity (GPa)193Density (kg/m)7780Thermal Conductivity (W/m.K)16.2Melting Point ( C )1450Electrical Resistivity (.m)0.072 x 10Table 2- Property for Stainless steel Grad e 3043.3 Carbon steel3.3.1 IntroductionSteel is a metal alloy consisting mainly of iron and contains 0.2 to 2.1 percent carbon copy. All steel contains carbon, but the term carbon steel applies specifically to steel containing carbon as the main alloying constituents. Medium carbon steel is carbon steel that contains between 0.30 and 0.60 percent carbon. It also has a manganese case of between 0.6 and 1.65 percent. This type of steel provides a good balance between strength and ductility, and it is common in many kinds of steel parts 5.3.3.2 Grade 080M30It can provide a better combination of toughness, strength and hardness. It also provides a counterbalance weight during for low-oscillation rotary process. Despite its relatively limited corrosion resistance, carbon steel is used in large tonnages in marine applications, fossil fuel power and nuclear power plants, transportation, chemical processing, petroleum production and refining, pipelines, mining, social organisation and me tal-processing equipment6.Material cost economySupplied forms- Strip barLimited corrosion resistanceBritish/ ISO StandardBS970 080M30Tensile Yield Strength (Mpa)550Ultimate Tensile Strength (Mpa)930Elongation over 50mm (%)16%Hardness (HB)269Density (kg/m3)7820Youngs Modulus (Gpa)205Thermal Conductivity (W/m-K)46.6Specific Heat Capacity (J/g-C)0.475Electrical Resistivity (n-m)234Table 3- Property for Medium Carbon Steel Grade 080M303.4 Final selection of material based on design and material specificationBritish/ ISO StandardAluminium Alloy AA 6061-T6Stainless steelBS 970 Grade 304Carbon steelBS970 080M30Tensile Yield Strength (MPa)310520 to 720550Elongation over 50mm (%)124516Density (kg/m3)270077807820Thermal Conductivity (W/m-K)16616.246.6Electrical Resistivity (n-m)0.040 x 100.072 x 10234Price per tonne (USD)22204450740Table 5- Comparison between three selected materialsFor this drive shaft, Aluminium Alloy is chosen. The reason material Aluminium Alloy is production by extrusio n, has good mechanical properties and exhibits good weldability. Aluminium alloys are widely used in engineering components where light weight and very good corrosion resistance. A low torsion was needed for the design of drive shaft, the ductile yield strength of the Aluminium Alloy 310 MPa was enough for the requirement. The Aluminium Alloy cost USD2220 per tonne which was lower than Stainless Steel which cost USD4450 per tonne.Aluminium alloy surfaces will keep their apparent shine in a dry environment due to the formation of a clear, protective layer of aluminium oxide. In a wet environment, galvanic corrosion can occur when an aliminium alloy is placed in electrical contact with other metals with more negative corrosion potentials than aluminium7.Element% PresentCarbon (C)0.0 0.07Chromium (Cr)17.50 19.50Manganese (Mn)0.0 2.00Silicon (Si)0.0 1.00Phosphorous (P)0.0 0.05Sulphur (S)0.0 0.02Nickel (Ni)8.00 10.50Iron (Fe)BalanceTable 6- Chemical composition for Aluminium allo y