A researcher is working on aluminum bronze alloy to be used as a pump. During production of the alloy, the researcher quenched and tempered the product. Will the fracture toughness of this product be high or low? Would you expect the resistance of the alloy to crack nucleation differ from resistance to crack growth? Briefly discuss

A researcher is working on aluminum bronze alloy to be used as a pump. During production of the alloy, the researcher quenched and tempered the product. Will the fracture toughness of this product be high or low? Would you expect the resistance of the alloy to crack nucleation differ from resistance to crack growth? Briefly discuss

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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As the head of R&D in your company which deals with aluminum, you are faced with aluminum alloy 2014 which was solution heat-treated. The alloy needs to be hardened by precipitation hardening to have a minimum yield strength of 345 MPa and ductility of at least 12% EL. What practical precipitation heat treatment with respect to temperature and time will you recommend to give these mechanical properties? Explain your answer Usc - A Z Type here to search @ 2 W S alt TRINIT # X 3 aps E D $ 4 C R Atomic percentage, magnesium O ene F % 5 T D V G 6 Y B & 7 H U N 8 J 9 11 M K Ľ L P 73 prt sc ? Ľ 1 backspace pause 40) Turn 8:59 AM 9/13/2022 11 enter 7 home A 28. 1 5 end 9
evwVmpreun atatus: QUESTION 34 Consider a single crystal of RENE NS, a second generation Nbased superaloy. This alloy is used in the hottest part of gas turbine engines for aerospace. The matrix phase has a face-centered-cubic (FCC) crystal structure. This single crystal has been subjected to a tensile stress that is applied along a (314) crystal direction (aka, the axis f sip occurs on a (1 1 1) plane in a (101) direction, please cakulate the stress in MPa at which ylelding will occur. The critical resolved shear stress for this alloy is 800 MPa. cose Fo cos dcos (CRSS) (1SJos dcose 3184.3 O 41,600.0 O800.1 O 6368.7 579.0 400.1 Save A A es nit to sove ond subent. Cck Sae All A es to save dll ansers 3.
(a) Briefly describe at least five methods to increase the strength of materials. (b) What are the metallurgical/processing techniques employed to enhance the creep resistance of metal alloys? (c) Cite three variables that determine the microstructure of an alloy. (d) What are the most common types of crystal defects and how do they affect properties? (e) Briefly describe the phenomenon of coring and why it occurs.
Compute the elastic modulus for the following metal alloys, whose stress-strain behaviors may be observed in the "Tensile Tests" module of Virtual Materials Science and Engineering (VMSE): (a) titanium, (b) tempered steel, (c) aluminum, and (d) carbon steel. How do these values compare with those presented in Table 6.1 for the same metals? Part 1 a) What is the elastic modulus of titanium in GPa using the data from VMSE? b) What is the elastic modulus of titanium in GPa from Table 6.1? a) E= i GPa b) E= i GPa eTextbook and Media Save for Later Attempts: 0 of 5 used Submit Answer
For the aluminum alloy whose stress-strain behavior can be observed in the "Tensile Tests" module of Virtual Materials Science and Engineering (VMSE), determine the following: (a) the approximate yield strength (0.002 strain offset), MPa (b) the tensile strength, and i MPa (c) the approximate ductility, in percent elongation. i %EL
Q3 contd. (d) The yield strength values of pure aluminium (Al) and pure copper (Cu) are 25 MPa and 20 MPa, respectively; whereas the yield strength values of cold rolled Al-Mn-Mg alloy and cast 60-40 Brass (60% Cu, 40% Zn) are 200 MPa and 105 MPa, respectively. With aid of schematics, explain the main mechanisms account for the increases in the strengths. (e) A cylindrical tie rod with a diameter of 18.4 mm is subjected to cyclic loading. The stress range is +/- 200 kN. Figure Q3.3 shows the S-N curve of the material of which the rod is made, how many cycles will this rod survive? Stress amplitude O₂ (MPa) 1500 1400 1300 1200 1100 1000 900 800 700 600 500 400 10² 10³ 104 4340 low-alloy steel Stress ratio = -1 Fig. Q3.3 105 106 Number of cycles to failure, Nf 107 108
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A sample of an aluminum alloy has a tensile strength of 140 MPa,What will be the maximum force that can be withstood by a rod of thatalloy with a cross-sectional area of 1 cm2?
You are given three metal test samples, with the same chemical composition and differing grain sizes: A: 5.0, B: 10.0 and C: 20.0 microns. Samples A and B have been tested and have yield stresses of 142.4 MPa and 135.8 MPa (all numbers are rounded off to the 1st decimal point). Based on this information, which of the following values do you think will be the closest to the yield stress of Sample C? In calculating the answer, use the Hall-Petch relation between yield stress of a metal ovield and the grain size of the metal d, which is Oyield = 00 + kd¯1/2 where k and og are constants. (This question has only one correct answer) a. 128.1 MPa O b. 115.8 MPa О с. 100.6 MPa O d. 131.1 MPa Ое. 152.4 MPa
You are given three metal test samples, with the same chemical composition and differing grain sizes: A: 5.0, B: 10.0 and C: 20.0 microns. Samples A and B have been tested and have yield stresses of 142.4 MPa and 135.8 MPa (all numbers are rounded off to the 1st decimal point). Based on this information, which of the following values do you think will be the closest to the yield stress of Sample C? In calculating the answer, use the Hall-Petch relation between yield stress of a metal o vield and the grain size of the metal d, which is Oyield = 00 + kd¬1/2 where k and og are constants. (This question has only one correct answer) а. 100.6 MPa b. 131.1 MPa С. 152.4 MPa O d. 115.8 MPa е. 128.1 MPa
What is the effect of solid solution strengthening on Tensile strength (TS) and Ductility (%EL,%AR)?
- Classify the following materials based on the propertiesbrass trayrubber bandbamboo basketwooden tablesteel chairplastic glasssteel hammerconcrete electric postsoft rockcopper wirespoonmilk canchewing gumknifemalleability-ductility-elasticity-brittleness-hardness-