Foundations of Materials Science and Engineering
6th Edition
ISBN: 9781259696558
Author: SMITH
Publisher: MCG
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 9.13, Problem 55AAP
If a thin sample of a eutectoid plain-carbon steel is hot-quenched from the austenitic region and held at 700°C until transformation is complete, what will be its microstructure?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
If a eutectoid steel sample is heated to 800°C and then quenched in a cold-water bath then
what would be the possible microstructure? Draw the microstructure and label it.
What is the% C ratio of two different steels with 80% and equal austenite content at 724 Celsius?
Question-5
(a) Describe the structural changes that take place when a 0.4%-C plain-carbon steel is slowly
cooled from the austenitic region just above the upper transformation temperature.
(b) What is a binary eutectic alloy system? Mention all important points. Give some examples.
Chapter 9 Solutions
Foundations of Materials Science and Engineering
Ch. 9.13 - (a) How is raw pig iron extracted from iron oxide...Ch. 9.13 - (a) Why is the FeFe3C phase diagram a metastable...Ch. 9.13 - (a) What is the structure of pearlite? (b) Draw a...Ch. 9.13 - Distinguish between the following three types of...Ch. 9.13 - Prob. 5KCPCh. 9.13 - (a) Define an FeC martensite. (b) Describe the...Ch. 9.13 - (a) What is an isothermal transformation in the...Ch. 9.13 - How does the isothermal transformation diagram for...Ch. 9.13 - Draw a continuous-cooling transformation diagram...Ch. 9.13 - (a) Describe the full-annealing heat treatment for...
Ch. 9.13 - Describe the process-annealing heat treatment for...Ch. 9.13 - What is the normalizing heat treatment for steel...Ch. 9.13 - Describe the tempering process for a plain-carbon...Ch. 9.13 - (a) Describe the martempering (marquenching)...Ch. 9.13 - (a) Describe the austempering process for a...Ch. 9.13 - (a) Explain the numbering system used by the AISI...Ch. 9.13 - (a) What arc some of the limitations of...Ch. 9.13 - (a) What compounds docs aluminum form in steels?...Ch. 9.13 - Prob. 19KCPCh. 9.13 - (a) Define the hardenability of a steel. (b)...Ch. 9.13 - Prob. 21KCPCh. 9.13 - Prob. 22KCPCh. 9.13 - Prob. 23KCPCh. 9.13 - What is the difference between a coherent...Ch. 9.13 - Prob. 25KCPCh. 9.13 - Prob. 26KCPCh. 9.13 - Prob. 27KCPCh. 9.13 - (a) Describe the three principal casting processes...Ch. 9.13 - Prob. 29KCPCh. 9.13 - Prob. 30KCPCh. 9.13 - Prob. 31KCPCh. 9.13 - Prob. 32KCPCh. 9.13 - Prob. 33KCPCh. 9.13 - Prob. 34KCPCh. 9.13 - Prob. 35KCPCh. 9.13 - (a) What are the cast irons? (b) What is their...Ch. 9.13 - Prob. 37KCPCh. 9.13 - Prob. 38KCPCh. 9.13 - Prob. 39KCPCh. 9.13 - Prob. 40KCPCh. 9.13 - Prob. 41KCPCh. 9.13 - Prob. 42KCPCh. 9.13 - Prob. 43KCPCh. 9.13 - Prob. 44KCPCh. 9.13 - Prob. 45KCPCh. 9.13 - (a) Why arc titanium and its alloys of special...Ch. 9.13 - Prob. 47KCPCh. 9.13 - Prob. 48KCPCh. 9.13 - Prob. 49KCPCh. 9.13 - Prob. 50KCPCh. 9.13 - Prob. 51KCPCh. 9.13 - Prob. 52KCPCh. 9.13 - Describe the structural changes that take place...Ch. 9.13 - Describe the structural changes that take place...Ch. 9.13 - If a thin sample of a eutectoid plain-carbon steel...Ch. 9.13 - If a thin sample of a eutectoid plain-carbon steel...Ch. 9.13 - (a) What types of microstructures arc produced by...Ch. 9.13 - A 0.65 % C hypoeutectoid plain-carbon steel is...Ch. 9.13 - A 0.25% C hypoeutectoid plain-carbon steel is...Ch. 9.13 - A plain-carbon steel contains 93 wt % ferrite7 wt%...Ch. 9.13 - A plain-carbon steel contains 45 wt% proeutectoid...Ch. 9.13 - A plain-carbon steel contains 5.9 wt%...Ch. 9.13 - A 0.90% C hypereutectoid plain-carbon steel is...Ch. 9.13 - A 1.10% C hypereutectoid plain-carbon steel is...Ch. 9.13 - If a hypereutectoid plain-carbon steel contains...Ch. 9.13 - A hypereutectoid plain-carbon steel contains 10.7...Ch. 9.13 - A plain-carbon steel contains 20.0 wt%...Ch. 9.13 - A 0.55% C hypoeutectoid plain-carbon steel is...Ch. 9.13 - A hypoeutectoid steel contains 44.0 wt% eutectoid...Ch. 9.13 - A hypoeutectoid steel contains 24.0 wt% eutectoid...Ch. 9.13 - A 1.10 % C hypereutectoid plain-carbon steel is...Ch. 9.13 - Draw timetemperature cooling paths for a 1080...Ch. 9.13 - Draw timetemperature cooling paths for a 1080...Ch. 9.13 - Thin pieces of 0.3-mm-thick hot-rolled strips of...Ch. 9.13 - Prob. 75AAPCh. 9.13 - Prob. 76AAPCh. 9.13 - Prob. 77AAPCh. 9.13 - Prob. 78AAPCh. 9.13 - Prob. 79AAPCh. 9.13 - Prob. 80AAPCh. 9.13 - Prob. 81AAPCh. 9.13 - Prob. 82AAPCh. 9.13 - An austenitized 40-mm-diameter 4340 steel bar is...Ch. 9.13 - Prob. 84AAPCh. 9.13 - Prob. 85AAPCh. 9.13 - Prob. 86AAPCh. 9.13 - Prob. 87AAPCh. 9.13 - Prob. 88AAPCh. 9.13 - Prob. 89AAPCh. 9.13 - Prob. 90AAPCh. 9.13 - Prob. 91AAPCh. 9.13 - Prob. 92AAPCh. 9.13 - (a) For a plain-carbon steel with 1 wt % carbon...Ch. 9.13 - Prob. 94SEPCh. 9.13 - Prob. 95SEPCh. 9.13 - Prob. 96SEPCh. 9.13 - Prob. 97SEPCh. 9.13 - Prob. 98SEPCh. 9.13 - Prob. 99SEPCh. 9.13 - Prob. 100SEPCh. 9.13 - Prob. 101SEPCh. 9.13 - Prob. 102SEPCh. 9.13 - Prob. 103SEPCh. 9.13 - Both 4140 and 4340 steel alloys may be tempered to...Ch. 9.13 - Prob. 105SEPCh. 9.13 - Aircraft fuselage is made of aluminum alloys 2024...Ch. 9.13 - Prob. 107SEPCh. 9.13 - Prob. 108SEPCh. 9.13 - Prob. 109SEPCh. 9.13 - (a) What makes austenitic stainless steels that...Ch. 9.13 - Prob. 111SEPCh. 9.13 - Prob. 112SEPCh. 9.13 - Prob. 113SEPCh. 9.13 - (a) Give examples of components or products that...Ch. 9.13 - Prob. 115SEPCh. 9.13 - Prob. 116SEPCh. 9.13 - Prob. 117SEP
Knowledge Booster
Learn more about
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
- 3.The TTT diagram of a plain carbon steel is given in Fig. 1. Identify whether this steel is a hypoeutectoid, eutectoid or hypereutectoid steel. Explain why the transformation happens slowly at 850°C as well as at 300°C. Determine the microstructures expected in this type of steel after the following heat treatment processes. a) Austenize at 900°C, quench to 400°C and hold for 1000 s and quench to 25°C. b) Austenize at 900°C, quench to 25°C. c) Austenize at 900°C, quench to 675°C and hold for 1 s, quench to 400°C and hold for 900 s and slowly cool to 25°C. 900 Acm Cs 800 A1 FezC + Y 33 Fe3C + pearlite 45 700 Ps 600 ++ Fe3C + pearlite Y+ bainite Bs 500 46 Bainite 400 Yu Bf 300 57 Ms 200 60 Mf Y+ martensite 100 62 Martensite 102 65 103 104 105 106 0.1 1 10 Time (s) Fig. 1 Temperature (°C) Rockwell C hardnessarrow_forwardWhat is the microstructure that will be formed after heat treatment of steel containing 1.4 carbon ratio with normalization and air cooling? support with phase diagram and TTT diagrams.arrow_forward(11.10) Suppose that a steel of eutectoid composi- tion is cooled to 550°C (1020°F) from 760°C(1400°F) in less than 0.5 s and held at this temperature. (a) How long will it take for the austenite- to pearlite reaction to go to 50% comple- ton? To 100% completion? (b) Estimate the hardness of the alloy that has completely transformed to pearlite? 11.12) Briefly cite the differences between pearl- rp. bainite, and spheroidite relative to crostructure and mechanical properties?arrow_forward
- Part C. Which type of phase transformation is important in heat treatment of steels? (circle one)Peritectic Eutectic Eutectoid Incongruent meltingAt what temperature and overall composition wt% C, does it occur?Write the reaction equation for this transformation, and briefly describe the nature of each of the three important phases that are involved.arrow_forwardUsing the TTT diagram for eutectoid steel, draw the specified cooling path on the diagram. Indicate what phases you expect in the final product with percentage of each phase. Assume the material has been fully austenitized before cooling. a. Water cool to room temperature b. Hot quench in molten salt to 690°C and then cooled isothermally for 2 hours: c. Hot quench to 610°C hold 3 minutes and water quencharrow_forwardA steel contains 18% pearlite and 82%primary ferrite at room temperature. Esti-mate the carbon content of the steel. Is thesteel hypoeutectoid or hypereutectoid?arrow_forward
- (c) The steels with the following compositions are heat treated and the results of microstructures are indicated in Table 2(c). Table 2(c): Heat treated steels and the results of microstructures Steel A 0.35 wt% C Coarse Pearlite Steel B 0.25 wt% C Coarse Pearlite Steel C 0.35 wt% C Fine Pearlite Rank the above steels based on carbon content and microstructures from the highest to the lowest hardness with justification.arrow_forwardWhat is the% C ratio of two different steels with 80% equal and equal austenite content at 724 C?arrow_forwardQ3 (a) Three plain-carbon steel types are: eutectoid, hypoeutectoid, and hypereutectoid can be seen in the Iron-Carbon phase diagram as shown in Figure Q3(a). Explain the effect of heating to 780 °C and slow cooling to 650 °C on these material types for the carbon weight percentages of 0.4%, 0.8% and 1.2%.. (i) (ii) Draw the effect of temperature on the microstructure of one plain carbon steel tvpe. (1539* C) 2902 F 2554 F Liquid L+ Austenite L+Cementite Austenite 2065 "F (1130 C) Eutectic (Ledeburite) Aus, + Ferrite Austenite + Cementite (908* C) 1666* F 1333 F (723 C) K. Eutectoid (pearlite) Ferrite Ferrite + Cementite 0.8 2.0 4.3 6.67 Fe,C Percent carbon by weight Hypo- eutectoid Hyper- eutectoid Hypoeutectio - Hypereutectic Steels Castirons Figure Q3(a) Temperature, Farrow_forward
- What is the composition (wt% C) of a steel with AISI designation 1090? .Would this be considered a low, medium, or high carbon steel? (circle one)arrow_forwardQuenching a hypereutectoid steel from a two-phase region of austenite and cementite; the phases present in the microstructure arearrow_forwardDraw Iron - Iron Carbide Phase diagram and show the following: 1- Temperature, phases and carbon weight for Eutectic. 2- Temperature, phases and carbon weight for Eutectoid Thecementite, 3- austenite, ferrite, delta phases with their 4- Types of ferrous alloys on different carbon rates. 5- Draw the phase at T= 700 CD and 0.7 wt% C what is its name ? temperatures and carbon weight.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Welding: Principles and Applications (MindTap Cou...Mechanical EngineeringISBN:9781305494695Author:Larry JeffusPublisher:Cengage Learning
Welding: Principles and Applications (MindTap Cou...
Mechanical Engineering
ISBN:9781305494695
Author:Larry Jeffus
Publisher:Cengage Learning
Introduction to Ferrous and Non-Ferrous Metals.; Author: Vincent Ryan;https://www.youtube.com/watch?v=zwnblxXyERE;License: Standard Youtube License