Hello, I’m a 3rd-year student in metallurgical engineering. I’m trying to understand the microstructure of a hypo-eutectic cast iron with 3.2 wt% carbon at a temperature of 650°C.
I know this temperature is below the eutectoid point (727°C), so I expect a mixture of pearlite and graphite, but I’d like to know exactly what phases form and how they look under SEM/optical microscope.
Can anyone please help me with:
- An image of the microstructure at this condition (simulated or experimental)?
- A zoomed-in region from the iron-carbon phase diagram?
- Any software recommendation to simulate this?
Thank you in advance! 🙏
Dear Madhu Kumar
On cooling four steps in micro structure transition of cast iron based on the metastable iron-carbon phase diagram these steps discussed briefly in [1] .The fourth step start when the eutectoid temperature is reached, the remaining austenite transforms to pearlite (lamellar cementite (Fe3C) and ferrite (iron with some carbon in solid solution). Some alloying additions may modify this final transformation, for example if enough Ni is present the austenite will not transform to pearlite. The final microstructure shows graphite flakes in a matrix of transformed ledeburite, see micrograph entry number 63 shown in [2]'
Now, in [3] figure 9 showing the microstructure of graphite (black areas) surrounded by pearlite. The pearlite appears in different colors due to different cutting angles of the lamellas. This means that both grey/brown areas and white are pearlite. Hope that is helpful to well understand the microstructure of a hypo-eutectic cast iron with 3.2 wt% carbon at a temperature of 650°C. My best regards...
[1]https://www.doitpoms.ac.uk/tlplib/microstructural_exam/castiron.php
[2]https://www.doitpoms.ac.uk/miclib/micrograph.php?id=63
[3]https://publications.lib.chalmers.se/records/fulltext/152927.pdf
Mohammed Hussein j. H. Al'Atia Thank you so much sir that was great explanantion
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Composites
- Nanocomposites