I need the answer quickly 1. What is the resultant microstructure of each shown cooling paths (A, B and C)?2. Write a brief description for cach resultant microstructure of 1, including the generalfeatures and the mechanical properties.8001400Eutectoid temperature70012006001000500800400300600Mstart200M+A50%400MR50%)M90%)1002001011010101010Time (s)(5.) aunjeaduaTemperature (F)

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Answered: rite a brief description for cach…

rite a brief description for cach resultant microstructure of 1, including the general atures and the mechanical properties.

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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13 °C 900 800 700 600 500 400 300 200 100 S CONTINUOUS COOLING TRANSFORMATION DIAGRAM '44' C ANALYSIS Wt% (See note on page 8) Mn PS Cr 0.81 0.035 0.037 0.14 Ac, Ac₁ M₂ mm 0,1 BAR 15 DIAMETER C Si 0.44 0.28 10 M 0.2 10 + + I 20 A 50 5 Mo 0.04 50 AUSTENITISED AT 850 C PREVIOUS TREATMENT ROLLED 1000 COOLING RATE AT 700 C Ni Al 0.15 500 200 100 10 - 100 20 Nb 50 50 100 150 200 V Cu 0.12 20 10 C PER MIN 100 200 1 300 150 200 300 500 500 Sn 0.016 5 START] FINISH 500 1000 mm OIL -mm WATER 10% 50% 90% 2000 mm LAIR Figure A3-2: CCT diagram for AISI 1044 with applicable 20 mm bar diameter annotation for water (black dashed line) and air (red dashed line). F = ferrite, P = pearlite, B = bainite and M = martensite.
Design of a Melting Procedure for a Casting You need to produce a M=1000 kg Cu-Ni alloy having minimum yield strength of Sy = 20,000 psi, a minimum tensile strength of Sut = 60, 000 psi, and a minimum % elongation of 20%. %3D You have in your inventory a Cu-20% Ni alloy and pure 1500 1400 1300 1200 nickel. 1100 1000 Design a method for producing castings having the required properties. 80,000 80 Tensile strength Cu strengthens Ni 60,000 60 40,000 40 Ni strengthens Cu % Elongation 20.000 20 Yield strength 20 40 80 Weight percent nickel 60 Ni Strength (psi) Temperature ('C) &Elongation
35. (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.
04: A) Consider the engineering stress-strain curves for three materials labeled A, B, and C below. Qualitatively, put the materials in the order in terms of largest-to- smallest strain hardening and Ductility. Stress B A Strain
M4.24 (Sl units) Aluminum has a density of 2.70 g/cm2 at room temperature (20°C). Determine its density at 650°C, using data in Table 4.1 of the book for reference (Hint: Assume a 1 cm2 cube, 1 cm on each side). Round to the nearest thousandth of a g/cm2.
Question 5: Following is tabulated data that were gathered from a series of Charpy impact tests on a tempered 4140 steel alloy. Temperature (°C) 100 75 50 25 0 -25 -50 -65 -75 -85 -100 -125 -150 -175 Impact Energy (J) 89.3 88.6 87.6 85.4 82.9 78.9 73.1 66.0 59.3 47.9 34.3 29.3 27.1 25.0 (a) Plot the data as impact energy versus temperature. (you can use Excel or other software). (b) Determine a ductile-to-brittle transition temperature as that temperature corresponding to the average of the maximum and minimum impact energies. (c) Determine a ductile-to-brittle transition temperature as that temperature at which the impact energy is 70 J.
Viscosity (Pa-s) 400 1016 1014 1012 1010 108 105 104 10² 1 200 800 Borosilicate glass Temperature (°F) 1200 1600 2000 96% silica glass Working range Melting point 400 600 Fused silica 2400 2800 3:200 Strain point Annealing point Softening point Working point Soda-lime glass 1018 1016 1014 1012 1010 108 106 104 10² 800 1000 1200 1400 1600 1800 Temperature (°C) Viscosity (P)
10. Measure the diameter of impression using the profile projector and compute for the hardness number using the formula: Where: 2P P – Applied Load D - Diameter of steel ball (8.0 mm) BHN «D(D- /D² – d² d - Ave. diameter of indentation | Raw data: Diameter Specimen (carbon steel) d1 d2 Air cooled 5.13 5.22 Oil quenched Water quenched 4.12 4.36 3.74 3.81 Note: All dimensions are in mm.
Q1/ A 2 kg of specimen has a ratio of 90 and 10 % wt (Pb and Sn alloy, respectively) is heated to 260° C and at the same temperature it is entirely a-phase solid solution. The alloy is melted to be liquid in a ratio of 50% while the rest is a-phase. This is achieved by either heating or replacement the alloy composition at a constant temperature. a- What is the temperature must be the sample heated? b- How much tin must be added to the sample (2 kg) at 260 °C to get this state?
Q1/ A 2 kg of specimen has a ratio of 90 and 10 % wt (Pb and Sn alloy, respectively) is heated to 260° C and at the same temperature it is entirely a-phase solid solution. The alloy is melted to be liquid in a ratio of 50% while the rest is a-phase. This is achieved by either heating or replacement the alloy composition at a constant temperature. a- What is the temperature must be the sample heated? b- How much tin must be added to the sample (2 kg) at 260 °C to get this state? Composition (at% Sn) 20 40 60 80 100 327°C 600 300 Liquid 500 232°C 200 B+L 400 183°C 18.3 61.9 97.8 300 100 200 100 20 40 60 100 (PD) Composition (wt% Sn) (Sn) Temperature ("C) 8 Temperature ("F)
1, What does steel have in terms of hot and cold shortness? What led to the Titanic disaster (focus only on the materials engineering component of the disaster in your response)? 2. What are the remedies for steel that is too hot or too cold? Respond succinctly. 3. What does metals and alloys' hydrogen embrittlement entail? What is the cheapest way to prevent hydrogen embrittlement in metals and alloys?
Cyclic Stresses (Fatigue); The S-N Curve 4. The fatigue data for a ductile cast iron are given as follows: Cycles to Failure Stress Amplitude [MPa (ksi)] 248 (36.0) 236 (34.2) 224 (32.5) 213 (30.9) 201 (29.1) 193 (28.0) 193 (28.0) 193 (28.0) 1 × 105 3 x 105 1 x 10⁰ 3 x 106 1 x 107 3 x 107 1 108 3 × 108 (a) Make an S-N plot (stress amplitude versus logarithm cycles to failure) using these data. (b) What is the fatigue limit for this alloy? (c) Determine fatigue lifetimes at stress amplitudes of 230 MPa (33,500 psi) and 175 MPa (25,000 psi). (d) Estimate fatigue strengths at 2 × 105 and 6 × 106 cycles.