Identify the physical properties of the Feldspar mineral family, their formation, and uses in Civil Engineering
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Identify the physical properties of the Feldspar mineral family, their formation, and uses in Civil Engineering.
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- Why are ceramics used in compression only? What are the kinds of bonds that exist in ceramics? Relate the identified bonds to possible properties generated by them in the ceramic.Three materials X, Y, and Z are available for a certain usage. Any material selected must have a good weldability. Tensile strength, stiffness, stability and fatigue strength are required with fatigue strength considered being the most important and stiffness the least important of these factors. The three materials are rated as follows in these factors. Properties X Y Weldability Excellent Рoor Good Tensile strength G E Fair Stiffness Very Good G G Stability G E G Fatigue strength F G E Which material should be selected? Explain your choice.Explain how dislocations have paradoxically rationalized why metals can be bothmechanically weak and strong. How have dislocations helped to explain work hardening of metals.
- Explain in detail the effect of Temperature on the Elastic Modulus and Yield Strength ofEngineering materials.(a) What is the effect of increasing the carbon content in steel on each of the each of the following items? 1. Yield strength 2. Modulus of elasticity 3. Ductility (b) Materials are generally classified into three categories based on the predominant types of bond. What are these three categories and what are the predominant types of bond in each category? For each category, provide two examples of common materials used by civil engineers.What are the materials/processes (and its development): STEELS AND CAST IRONS -STAINLESS STEEL -CAST IRONS
- 1. The tensile strength vs. temperature curves of aluminum are plotted below. Explain the meaning of these two curves. 400 Ultimate strength 300 Yield strength 200 100 -200 -150 -100 -50 50 100 150 200 250 Temperature, °C Strength, kPaConsider an 6061-T6 aluminun alloy having an elastic modulus of 75 GPa and yield strength of 260 MPa. What is the modulus of resilience of the given material ?Identify the physical properties of the Biotite mineral family, their formation, and uses in Civil Engineering.
- c). Interpret the following diagram? The effect of carbon and heat treatment on the properties of plain carbon steels. 160 140 Tensile 120 strength 100 Impact energy | 100 Annealed 80 80 Normalized 60 60 Annealed 40 `Yield strength 20-% Elongation Annealed 20 Normalized- 0.2 0.4 0.6 0.8 1.0 Weight percent carbon Figure-4 Yield and tensile strength (ksi) Normalized % Elongation or impact energy (ft • Ib)Which one of the following types of steel is used in the manufacturing of metro and monorails? A B Mild steel D Cast steel C Manganese steel Bessemer steelBoth tensile strength and hardness are indicators of a metal’s resistance to plastic deformation. Consequently, they are roughly proportional as shown in Figure 4b (ii) below for different types of metals including brass, thus the hardness values can be estimated from the material’s Ultimate Tensile Stress (UTS) and vice versa. What are the Brinell and Rockwell hardness numbers for the brass specimen with its engineering stress/strain curve shown in Figure 4b (i)?
