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- In a stress strain curve of mild steel, the elastic limit will be before the limit of proportionality. Select one: O True O False The following figure represents Body Centered Cubic structure Select one: O True e here to search 99+ hp fs f6 f8 fg 3 & 7 LO %24Temperature (°C) 1600 0 1500 1400 1300 1200 1100 1000 1085°C 0 (Cu) 1 20 20 Alloy Brass Steel Composition (at% Ni) 40 Liquid Liquidus line Aluminum Titanium B @x+L 60 CE 40 60 Composition (wt% Ni) 80 Yield Strength [MPa (ksi)] 345 (50) 690 (100) 275 (40) 480 (70) Solidus line 1453°C 80 100 2800 2600 Problem 5 A structural member 250 mm (10 in.) long must be able to support a load of 44,400 N (10,000 lb,) without experiencing any plas- tic deformation. Given the following data for brass, steel, aluminum, and titanium, rank them from least to greatest weight in accordance with these criteria. 2400 8.5 7.9 2.7 4.5 2200 2000 100 (Ni) Density (g/cm³) Temperature (°F)4 ) Every temperature measuring instrument makes use of specific physical property in order to measure temperature objectively . Which physical properties are used in thermocouple , PT sensors and mercury - in - glass thermometer ? Briefly describe each of this methods.
- ne following data were collected from a standard 0.505-in. diameter test specimen of a copper alloy (initial length (lo) 2.0 in.): Load (b)) 0.0 3000 Al (in) 0.0 0.00167 (a) the 0.2% offset yield strength; (b) the tensile strength; (c) the modulus of elasticity: 6000 0.00333 (d) the % elongation; (e) the % reduction in area; After fracture, the total length was 3.014 in. and the diameter was 0.374 in. Plot the engineering stress-strain curve and calculate. 10500 12000 9000 7500 0.26 0.040 0.00417 0.009 (1) the engineering stress at fracture; and (g) the modulus of resilience.. 12400 11400 1.02 0.50 ite. led sel.a) Draw conclusions from the following diagram? 120 100 Tensile strength (ksi) (●) 80 60 Grain size (10-3 mm) (A) 40 Electrical conductivity (%) (O 20 Elongation (%) (×) 25 50 75 100 200 400 600 800 Percent cold work Annealing temperature Figure-1 Kuado35. (SI units) Zinc has a density of 7.15 g/cm3 at room temperature (20°C). Determine its density at 410°C, using data in Table 4.1 of the book for reference (Hint: Assume a 1 cm3 cube, 1 cm on each side). Round to the nearest thousandth of a g/cm3.
- F THIN NTVERSITY 195 Problem Atomic percent silver 30 If 500 g of a 40 wt % Ag-60 wt % °F °C 1100 10 20 40 50 60 70 80 90 Cu alloy is slowly cooled from 1084.5° 1900 1000°C to just below 780°C 1000 L. 961.93 1700 (a) How many grams of liquid and 900 53 L+a 1600 proeutectic a are present at 850°C? 800 F a L+B B 1400 (b) How many grams of liquid and 780° 7.9 71.9 91.2 700- proeutectic a are present at 780°C + AT ? 1200 600 a + B (c) How many grams of a are present in 1000 the eutectic structure at 780°C - AT ? 500 850 400 Cu (d) How many grams of B are present in 10 20 30 40 50 60 70 80 90 Ag Weight percent silver the eutectic structure at 780°C - AT ?Determine the equivalent spring stiffness constant of the following. 235 N/m 155 N/m 350 N/m wwwwwwwwwww 140 N/m 325 N/m ww www 100 N/m www F Answer:When stress is applied to a liquid over an application time tp the liquid needs a relaxation time tc to accordingly deform. Relaxation time tc is a physical property of liquids. The Deborah number is De= tdt, . The lower the Deborah number of a stress applied to a material the more.. : Select one: O The material behaves like a solid O The material behaves like visco-elastic O The material behaves like a liquid