Among the test coupon you were provided with, which material hasthe highest potential for strain hardening? This means the yield strength ofthe material can be improved, as a percentage of its current yield strength,by the largest margin. Justify your answer.temHIPSnylon 6 (fiber)ABSpolypropyleneTensile strength52 MPa63 МРа44 MPa34 MPаExperimental Modulus of885 MPa980 MPа950 MPa480 MPаelasticityCross Sectional Area2.482 mm?2.482 mm?2.482 mm?2.482 mm?Tensile elongation at break100-200%12-16%80-110%100 - 650%

Among the test coupon you were provided with, which material has the highest potential for strain hardening? This means the yield strength of the material can be improved, as a percentage of its current yield strength, by the largest margin. Justify your answer. Item HIPS nylon 6 (fiber) ABS polypropylene Tensile strength 52 MPa 63 MPa 44 MPa 34 MPa Experimental Modulus of 885 MPa 980 MPa 950 MPa 480 MPa elasticity Cross Sectional Area 2.482 mm2 2.482 mm2 2.482 mm? 2.482 mm? Tensile elongation at break 100-200% 12-16% 80-110% 100 - 650%

Among the test coupon you were provided with, which material has the highest potential for strain hardening? This means the yield strength of the material can be improved, as a percentage of its current yield strength, by the largest margin. Justify your answer. Item HIPS nylon 6 (fiber) ABS polypropylene Tensile strength 52 MPa 63 MPa 44 MPa 34 MPa Experimental Modulus of 885 MPa 980 MPa 950 MPa 480 MPa elasticity Cross Sectional Area 2.482 mm2 2.482 mm2 2.482 mm? 2.482 mm? Tensile elongation at break 100-200% 12-16% 80-110% 100 - 650%

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter6: Introduction To Mechanical Properties

Section: Chapter Questions

Problem 15ETSQ

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Question No.2 Figure P1.16 shows the stress-strain relations of metals A and B during ten- sion tests until fracture. Determine the following for the two metals (show all calculations and units): a. Proportional limit b. Yield stress at an offset strain of 0.002 m/m. c. Ultimate strength d. Modulus of resilience e. Toughness f. Which metal is more ductile? Why? 000 -Metal A S 600 -Metal B 300 0.00 a.02 0.04 0.06 0.08 0.10 0.12 0.14 Strain, mim FIGURE P1.16 Stress, MPa
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Another of the steel components manufactured by michael's company is steel railway track sections. Thecomponent has a length of 120m (at a temperature of -10°C) and is to be exposed to a temperaturerange of -10°C to 55°C. In order to calculate the gaps which need to be left between the sections michael'scustomer needs to determine the maximum length which each railway track section will expand to andmichael have been asked to carry out the calculation for them. michael have also been instructed to determinethe percentage change in volume and surface area when exposed to the same initial and finaltemperatures. The customer has informed him that the cross sectional profile of the railway track isrectangular and of breadth 14cm and height 32cm. Assume the coefficient of thermal expansion ofsteel is 12x10-6 /°C. Briefly discuss the changes that occur with in the steel as a result of the change intemperature.
S Figure P1.16 shows the stress-strain relations of metals A and B during ten- sion tests until fracture. Determine the following for the two metals (show all calculations and units): a. Proportional limit b. Yield stress at an offset strain of 0.002 m/m. c. Ultimate strength d. Modulus of resilience e. Toughness f. Which metal is more ductile? Why? 900 Metal A 600 Metal B 300 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 Strain, m/m FIGURE P1.16 Stress, MPa
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