Powder metallurgy is defined as the process of mixing of powder materials in some desired ratio, compacting the powder mixture to some higher pressures in a compaction die so that the bond formation would takes place followed by the sintering process at higher temperatures (nearly around melting temperatures) so as to achieve sufficient strength. The resulting parts are solid bodies of material with sufficient strength and density for use in diverse fields. Highly porous parts, precise high performance components and composite materials can be produced by P/M route. P/M offers compositional flexibility, minimized segregation and ability to produce graded microstructures with varying physical and mechanical properties. P/M also offers advantages
of 600c, Conc. of 700 gm/lit, Time of 8min. This is the optimum setting obtained under the condition in which the experiments were performed. The Etch factor decreases with increase Concentration. The result of ANOVA for the Etch factor is presented in table 10.9.
For example strain hardening, as the ductile material is deformed more and more its strength and its hardness increases because of the generation of more and more dislocations, so, in engineering applications, especially the ones which have safety concerns involved, ductile materials are the obvious choice. Safety and dependability are the main concern in a material design, but in order to attain these goals, there needs to be a thorough understanding of the fracture both brittle and ductile. Understanding fracture and failure of materials will lead the materials engineer to develop a safer and more dependable materials and
If steel wool is made of fine strands of steel, and steel is a form of metal, metal is known to be a good conductor of heat because of the close packing of the metal ions in the lattice and the delocalised electrons that can carry kinetic energy through the lattice. That’s why steel wool was predicted to be the best insulator to keep heat in and the stubby was predicted to be the best cooling insulator. THE INDEPENDENT VARIABLE(S) The independent variables can be changed such as the different types of materials used which are the steel wool, the bubble wrap and the stubby. THE DEPENDENT VARIABLE The dependent variable is the type that can’t be changed. In this practical the dependent variable is the temperature.
Finally, tensile properties are often used to predict the behavior of a material under forms of loading other than uniaxial tension. Tensile specimens: First, tensile specimens have to have shoulders or thick part in both ends because of gripping. Moreover, the most important part in specimens are the gage section, the cross-sectional area of the gage section is reduced base on deformation and future which supposed to happen in this area. Then The distances between the ends of the gage section and the shoulders should be great enough so that the larger ends do not constrain deformation within the gage section, and the gage length should be great relative to its diameter. Otherwise, the stress state will be more complex than simple tension.
This is because the steel is hard but brittle and has internal stresses. The solution to this is by tempering to increase toughness, reduce the brittleness but in turn reduces hardness. Tempering a steel heats up the steel to temperatures ranging from 200-500°C depending on the desired mechanical properties. Heating after the quenching allows the carbon to diffuse into the martensite to relieve internal stresses. The end result would be the shock absorption capability which depends on the tempering temperature (higher the temperature, higher the shock
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Create a Metal by Welding Process Metal Fabrication is one of the conventional methods for making substantial hardware and today numerous welding organizations are giving an advanced touch to this strategy. Metal creation might be portrayed as a quality expansion handle that involves the development of machines and structures from different crude materials. There can be doubtlessly metal creation welding grants quality and security for a working gear or gadget. Metal Fabrication and welding for overwhelming mechanical gadgets fits distinctive work examples and yields. Manufacture is fairly a wide term to indicate building metal structures through the three unique steps - cutting, twisting, and gathering.