Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Chapter 4, Problem 30RQ
To determine
Features that make the austenite attractive for forming and a starting structure for many heat treatments.
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Chapter 4 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 4 - What kind of questions can be answered by...Ch. 4 - Prob. 2RQCh. 4 - Supplement the examples provided in the text with...Ch. 4 - Prob. 4RQCh. 4 - What three primary variables are generally...Ch. 4 - Use the pressure–temperature diagram for water...Ch. 4 - Prob. 7RQCh. 4 - What form of equilibrium phase diagram is most...Ch. 4 - What is a cooling curve?Ch. 4 - Prob. 10RQ
Ch. 4 - Prob. 11RQCh. 4 - Prob. 12RQCh. 4 - Prob. 13RQCh. 4 - What types of changes occur upon cooling through a...Ch. 4 - Prob. 15RQCh. 4 - What is a tie�line? For what types of phase...Ch. 4 - What points on a tie�line are used to determine...Ch. 4 - Prob. 18RQCh. 4 - What is a cored structure? Under what conditions...Ch. 4 - What is the difference between a cored structure...Ch. 4 - Prob. 21RQCh. 4 - Prob. 22RQCh. 4 - Prob. 23RQCh. 4 - Prob. 24RQCh. 4 - For the various three�phase reactions, what does...Ch. 4 - Prob. 26RQCh. 4 - Prob. 27RQCh. 4 - Prob. 28RQCh. 4 - Prob. 29RQCh. 4 - Prob. 30RQCh. 4 - Prob. 31RQCh. 4 - Prob. 32RQCh. 4 - Prob. 33RQCh. 4 - Prob. 34RQCh. 4 - Prob. 35RQCh. 4 - Prob. 36RQCh. 4 - Prob. 37RQCh. 4 - What is carbon equivalent, and how is it computed?Ch. 4 - Prob. 39RQCh. 4 - Prob. 40RQCh. 4 - Prob. 1PCh. 4 - Prob. 2PCh. 4 - Prob. 3PCh. 4 - Consider the manufacture of a fishhook beginning...Ch. 4 - If a stainless steel were to be used, what type of...Ch. 4 - A wide spectrum of coatings and surface treatments...Ch. 4 - Prob. 1.4CSCh. 4 - Prob. 2.1CSCh. 4 - Prob. 2.2CSCh. 4 - Prob. 2.3CSCh. 4 - Prob. 2.4CS
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- What are the three steps in precipitation hardening?arrow_forwardIs this a austenite microstructure if so how can you tellarrow_forwardBelow is a continuous cooling transformation curve for steel (upper) and for a silicate melt (lower). Describe the similarities and differences as follows. a. What is the critical cooling rate in each case? b. What phase(s) form in each case when the critical cooling rate is exceeded? c. What phase(s) form in each case if the cooling rate is very slow? 800 1400 Ae lemperature Austenite *peorlite begins 10FI 700 1200 Austenitepearlite complete 1600 1000 5009 800 Tronsformation stops 400 600 300 400 Austenite -mortenstic structure 200 -Isathermal dogram Continuous transformaton diogrom Constant rate coding curves - 100 200 Findl structure Mortensite Morlensite i peorlile Peorite (softer, coorser- 0.1 10? 10 Tronsformation time, seconds Continuous Cooling-Transformation (C-T)Diagram (Derived from the isothermal-transformation diagram for a plain-carbon eutectoid steel) 1200 Glass Crystallization begins 1100 1000 Critical cooling rate Glass-ceramic 900 Crystallization ends 800 700 102 10…arrow_forward
- Excellent combinations of hardness, streneth, and toughness are obtained from bainite. One heat treater austenitized a eutectoid steel at 750°C, quenched and haid the steal at 250°C for 15 min, and finaly permitted the staal to cool to room temperature. Did he produce the required bainitic structure? Use the diegram below in your answer Answer: Tie ReckvellChndrearrow_forwardWrite the materials by low ductility to increased ductility: *steels are assumed to have no cold work and contain equilibrium phases* (Diamond, 1040 steel, 1040 steel with 10% cold work, pure copper, polymer)arrow_forwardWhich of the following may occur during an annealing heat treatment? (Please choose all that apply) Stresses may be relieved Ductility may decrease Toughness may increase Strength may increasearrow_forward
- 5. What is the role of austenitic gram size in martensitic transformations? Is austenitic grain size is important to the strength of martensite? What other factors are important to the strength and toughness in technological hardened steels?arrow_forwardWith respect to the S-N diagram shown below, answer the following questions:(a) for Gray cast iron, what is the projected number of cycles to failure for an induced stress of 20,000 psi?(b) What is the endurance limit and associated stress for a 0.47% heat treated carbon steel? (c) What is the endurance limit for the Aluminum-copper alloy?(d) What is the endurance strength for heat treated Alloy Steel at 400,000 cycles?arrow_forwardQuestion 1 You are working on a design team at a small orthopaedic firm. You have been asked to select a cobalt- chrome-molybdenum (CoCr) material that will not experience plastic deformation under a specific mechanical test, as follows... A tensile stress is applied along the long axis of a solid cylindrical rod that has a diameter of 10 mm. An applied load of some magnitude F produces a 7x10³ mm change in diameter (see figure below, original shape is blue, elongated shape is unshaded). Q1F: How would the "new alloy" material (with different properties as shown below) behave, assuming it has the same initial diameter (10mm) and applied load (F) in the tensile test? That is, would it experience plastic deformation (yield) under the conditions of this problem?arrow_forward
- In your own words describe the following heat treatment procedures for steels and, for each, the intended final microstructure: (a) full annealing (b) normalizing (c) quenching (d) tempering.arrow_forwardUse the following TTT Diagram for the following questions: 800 A 1400 -Eutectoid temperature 700 1200 600 1000 500 800 400 600 300 Mistart) 200 50% 400 M+A M(50%) M(90%) 100 200 10-1 10 102 103 10 105 Time (s) Temperature ("C) Termperature (°F)arrow_forwardContinuous Cooling Transformation (CCT) Diagram for Steel 1. If a sample of austenite is cooled from 760°C to room temperature at a rate of 85°C/s (midway between the red and blue dotted lines), estimate the following values: a) How much time would it take for pearlite to begin forming and at what temperature would this occur? b) How much time would it take for martensite to begin forming and at what temperature would this occur? Temperature (°C) 800 Eutectoid temperature 1400 700 Pearlite 600 500 400 300 Critical cooling rate 200 140°C/s Austenite 35°C/s 1200 1000 800 600 M (start) 400 100 Martensite Martensite I + ++ Pearlite 200 Pearlite 0 10-1 1 10 102 103 104 105 Time (s) Temperature (°F)arrow_forward
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