- The microstructure for AISI 1080 carbon steel after heat 760°C then For AISI 1080 carbon steel, heat to 760°C after suitable holding time, cool rapidly to 650°C, hold for 90s, then quench to room temperature. A. 50% martensite 50% perlite B.100% pearlite C. 50% bainite 50% pearlite D. 100% bainite -The microstructure for AISI 1080 carbon steel after heat to 760°C then rapidly cool to 600°C, hold for 4 s, rapidly cool to 450°C, hold for 100 s, then quench to room temperature. A. 50% pearlite, 25% bainite, and 25% martensite B. 50% pearlite 50% bainite C. 25% pearlite, 25% bainite, and 50% martensite D. 50% pearlite, 50% martensite - The microstructure for AISI 1080 carbon steel after heat to 760°C then cool rapidly to 400°C, hold for 15 s, then quench to room temperature A. 100% martensite B. 100% bainite C. 50% bainite 50% martensite D. 25%bainite 75% martensite

- The microstructure for AISI 1080 carbon steel after heat 760°C then For AISI 1080 carbon steel, heat to 760°C after suitable holding time, cool rapidly to 650°C, hold for 90s, then quench to room temperature. A. 50% martensite 50% perlite B.100% pearlite C. 50% bainite 50% pearlite D. 100% bainite -The microstructure for AISI 1080 carbon steel after heat to 760°C then rapidly cool to 600°C, hold for 4 s, rapidly cool to 450°C, hold for 100 s, then quench to room temperature. A. 50% pearlite, 25% bainite, and 25% martensite B. 50% pearlite 50% bainite C. 25% pearlite, 25% bainite, and 50% martensite D. 50% pearlite, 50% martensite - The microstructure for AISI 1080 carbon steel after heat to 760°C then cool rapidly to 400°C, hold for 15 s, then quench to room temperature A. 100% martensite B. 100% bainite C. 50% bainite 50% martensite D. 25%bainite 75% martensite

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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Question

- The microstructure for AISI 1080 carbon steel after heat 760°C then For AISI 1080 carbon steel, heat to 760°C
after suitable holding time, cool rapidly to 650°C, hold for 90s, then quench to room temperature.
A. 50% martensite 50% perlite
B.100% pearlite
C. 50% bainite 50% pearlite
D. 100% bainite
-The microstructure for AISI 1080 carbon steel after heat to 760°C then rapidly cool to 600°C, hold for 4 s,
rapidly cool to 450°C, hold for 100 s, then quench to room temperature.
A. 50% pearlite, 25% bainite, and 25% martensite
B. 50% pearlite 50% bainite
C. 25% pearlite, 25% bainite, and 50% martensite
D. 50% pearlite, 50% martensite
- The microstructure for AISI 1080 carbon steel after heat to 760°C then cool rapidly to 400°C, hold for 15 s,
then quench to room temperature
A. 100% martensite
B. 100% bainite
C. 50% bainite 50% martensite
D. 25%bainite 75% martensite
- The microstructure for AISI 1080 carbon steel after heat to 760°C then rapidly cool to 600°C, hold for 90 s,
rapidly cool to 250°C, hold for 100 s, then quench to room temperature
A. 100% martensite
B. 50% bainite 50% pearlite
C. 100% pearlite
D. 50%perlite 50% martensite
- The microstructure for AISI 1080 carbon steel after heat to 760°C then rapidly cool to 350°C, hold for 10 s,
then quench to room temperature in water. Reheat to 300°C for 1h and slowly cool to room temperature.
A. 100% martensite
B. 100% tempered martensite
C. 100% bainite
D. 100% reheated bainite
-The microstructure present in a 10110 steel after heat to 900°C, quench to 400°C and hold for 20 s, and quench
to 25°C.
A. 50%bainite 50%martensite
B. 100% bainite
C. 25% bainite 75%martensite
D. 100% martensite

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