b) This diagram shows an optical micrograph of a polished steel specimen. The black regions are cementite. 50 um i) Label the phases and microstructures shown in the micrograph. ii) Explain how this microstructure is formed when molten steel at 1200°C is cooled. You may find it helpful to illustrate your explanation with a diagram.

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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b) This diagram shows an optical micrograph of a polished steel specimen. The
black regions are cementite.
50 um
i)
Label the phases and microstructures shown in the micrograph.
ii)
Explain how this microstructure is formed when molten steel at 1200°C is
cooled. You may find it helpful to illustrate your explanation with a
diagram.
Transcribed Image Text:b) This diagram shows an optical micrograph of a polished steel specimen. The black regions are cementite. 50 um i) Label the phases and microstructures shown in the micrograph. ii) Explain how this microstructure is formed when molten steel at 1200°C is cooled. You may find it helpful to illustrate your explanation with a diagram.
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