The Science and Engineering of Materials (MindTap Course List)
7th Edition
ISBN: 9781305076761
Author: Donald R. Askeland, Wendelin J. Wright
Publisher: Cengage Learning
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Determine the modulus of resilience for each of the following alloys using modulus of
elasticity given in the below table
The properties of a titanium allow used in commercial airplanes are shown in the table:
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0.020
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0.055
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- A copper-zinc alloy has the following properties: Grain Diameter (mm) Strength (MPa) 0.015 170 MPa 0.025 158 MPa 0.035 151 MPa 0.050 145 MPa Determine (a) the constants in the Hall-Petch equation; and (b) the grain size required to obtain a strength of 200 MPa.arrow_forwardUsing the values found in the previous two questions, use the Hall-Petch equation and the graph below for a 70 Cu-30 Zn cartridge brass to predict the yield strength (in MPa) of this alloy when the average grain diameter is 1.0 x 10³ mm. Enter only the numerical value, do not include the unit. Grain size, d (mm) 10- 10-2 5 x 103 200 150 100 50 4 8. 12 16 d1/2 (mm-1/2) Yield strength (MPa)arrow_forwardMoving to another question will save this response. uestion 37 Materials with dislocations have lower shear strengths than materials with no dislocations. Is this true or false? Moving to another question will save this response. Larrow_forward
- Strength of metals and their alloys increases as grain size decreases. Find out the amount of increase in strength if total area of grain boundaries doublesarrow_forwardThe number of copper-nickel alloys with a mention of the applications of each of themarrow_forwardWhich of the following statements are true of dislocations: Select one or more: a. Dislocations are spatially fixed defects b. Dislocations enable plasticity in metals Dislocations can be viewed without the aid of a microscope Dislocations can arise due to shear deformation of the lattice □ c. d. e. Dislocations arise due to insertion of a foreign atom into a lattice site of a "host" metalarrow_forward
- Q3: Analyze the following figure and answer the following question (Fe-C Diagram) ? 1639 Liquid 1400 +y 7+L L-Fec 1146 C Fe.C- 910 7- Fesc 727 C o.025 a- Fesc 6.67 of Hypo ectd- Hyper ectd 0810 Steel Cast Iron I- What are the % solubility and temperature of exist of a-ferrite? b- 0.025% and 273°c to 910 c. d- 0.05% and 910°c to 1124°c. a-0.05% and 273°c to 910°c. c- 2.1% and 910°c to 1394°c. 2- What are the % solubility and temperature of exist of Austenite (Y)? a- 0.05% and 273°c to 910°c. c- 2.1% and 910°c to 1394°c. b- 0.025% and 273°c to 910°c. d- 0.09% and 1394°c to 1539°c. 3- What are the % solubility and temperature of exist of 8-ferrite? a- 0.05% and 273°c to 910°c. b-0.025% and 273 e to 910°e. c- 2.1% and 910°c to 1394°c. d- 0.09% and 1394°c to 1539°c. 4- What is the % C content in Cementite Fe3C? AB a- 6.67%. b- 0.025%. c- 2.1%. d- 0.09%. (araduarrow_forwardAccording to Hall-Petch equation, the 1 point decreasing in grain size causes strengthening of metals * True Falsearrow_forwardDetermine the percentage of ductility of a metal alloy having the following tensile stress-strain diagram.arrow_forward
- The engineering yield strength of an alloy is 80 ksi.arrow_forwardUse the following Phase Diagram for a Ge-Si alloy for the following questions: Ge - Si Alloy Phase Diagram 1500 1400 Liquid 1300 1200 Liquid 1100 1000 900 20 40 60 80 100 Composition (wt% Si) Temperature (°C)arrow_forwardA copper-zine alloy has the properties shown in the table below. Grain Diameter (mm) Strength (MPa) 0.015 170 MPa 0.025 158 MPa 0.035 151 MPa 0.050 145 MPa Determine (a) the constants in the Hall-Petch equa- tion; and (b) the grain size required to obtain a strength of 200 MPa.arrow_forward
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