Iron-Carbon Phase Diagram | Creating | Steel | Cast Iron | hypo-eutectoid | hyper-eutectoid

In this video we deal with steels as the most important alloy in mechanical engineering, consisting of iron and carbon. We will explain the phase diagram relevant for steels, which is also referred to as the iron-carbon phase diagram (steel part). In this context, we discuss in more detail the stable system with its graphite precipitation, which is relevant for cast irons, and the metastable system with its cementite precipitation (Fe3C), which is relevant for steels. We will also explain the determination of microstructural components such as ferrite and pearlite or grain boundary cementite for hypereutectoid, eutectoid and hypoeutectoid steels.
00:00 Iron, steel and cast iron
00:43 Cooling curve of soft iron (pure iron)
02:34 Creating iron-carbon phase diagram
03:45 Lattice transformation & solubility
05:34 Complete iron-carbon phase diagram
08:00 Solidification of steels
09:03 Gamma-Alpha lattice transformation (austenite into ferrite)
10:25 Stable system (precipitation of graphite in cast iron)
11:36 Metastable system (precipitation of cementite in steels)
13:34 Stable and metastable phase diagram in comparison
14:28 Complete cooling curve of soft iron (delta-iron)
16:47 Microstructure transformation of steels
19:27 Eutectoid steel
21:09 Solubility of carbon in austenite (gamma-iron)
22:55 Hypereutectoid steel
24:50 Approaching the eutectoid composition
26:31 Hypoeutectoid steel
28:13 Approaching the eutectoid composition
29:47 Summary
32:18 Determination of the microstructure proportions (hypoeutectoid steel)
34:55 Determination of the phase fractions (hypoeutectoid steel)
36:12 Determination of the microstructure proportions (hypereutectoid steel)
37:07 Determination of the phase fractions (hypereutectoid steel)
37:44 Microstructure diagram

[@ogheneruonainkori8067]

This is simply the most informative Video on the Iron-carbon Phase diagram I have ever come across.
So helpful

[@tec-science]

Thank you 🙏🏾

[@atharvinamdar1995]

Much better explanation ✨

[@tec-science]

Thanks 🙏🏽

[@AkifKaynak]

This excellent video is packed with information and creative illustrations including fundamental reasons behind the phase transformations, the difference between stable Fe-C and metastable Fe-Fe3C and cooling curves at different carbon concentrations, all perfectly explained, most likely the best on the topic.

[@tec-science]

thank you very much!

[@enkhchimeechinbat2995]

Amazing. Simple discerption and understandable speech.

[@tec-science]

Thanks a lot buddy for appreciating all my effort 🙏

[@user-tk8yg8jo1t]

Thank you very much. It helped me a lot in learning the iron-carbon diagram.

[@tec-science]

You're welcome 🙏🏾

[@itsamankumar403]

TYSM 🙏🙏

[@tec-science]

thank you!

[@amiramiri3711]

Really great job!

[@tec-science]

Thank you very much for appreciating the hard work. The videos usually take several days or even weeks to produce. That's why I'm happy if you like the videos.

[@kuntoajibukanpenyanyi]

Great explanation video. Do you mind to explain a little further about Ferrite decarburization phenomena, related to this carbon enrichment ?

[@tec-science]

During the lattice transformation from austenite to ferrite, the carbon atom simply no longer has a place in the already transformed ferrite lattice. It therefore diffuses into the adjacent austenite, which has not yet decomposed into ferrite. As a result, carbon accumulates in the remaining austenite over time.

[@nabeelgaffar]

Very informative. Can you make a video about the phase diagram of Iron -Chromium-carbon phase diagram