Creative Spoonfeeding- Techniques To Learn Metallurgy Easy

Replies

• 

  zaveri

  bring it soon dude.
• 

  Ambarish Ganesh

  Okay. Let's begin with the Iron-Carbide diagram first-
  
  
  
  Note the Eutectic and Eutectoid points. Now you'll have to memorize the basic sketch-up of this graph. No need to memorize all the temperatures and Ferrite %ages.
  
  Now label the Austenite zone, the liquid zone and (cementite+ledeburite) zone. Note that Pearlite comes only at the bottommost part and nowhere else. The other zones can be easily marked once these are done. (Zone ECB is between Liquid and Austenite, so it is Liquid+Austenite and so on...)
  
  Now make a note of the ferrite present everywhere along the temperature axis. The rest of the labelling is now extremely easy. 😀
• 

  Ambarish Ganesh

  I had further simplified the above by denoting each substance by a symbol.
  
  γ (gamma) for Austenite and so on. Try this technique, I'm sure it will simplify this diagram a lot, enabling you to memorize it in a few minutes.
  
  Choose any symbol you like, but make sure you remember the substance it's associated with. 😀
• 

  Ambarish Ganesh

  Ok, now let's do the INVARIANT reactions!
  
  In a Iron carbide diagram, you'll encounter 3 Invariant reactions.
  
  First Is Peritectic Reaction. (At 1495 degree Celsius)
  
  δ-ferrite + Liquid ----> γ (Austenite)
  
  Now, δ being an interstitial solid solution- symbolize it with a straight standing man (Iron Man, if you may 😉 ).
  Liquid - Assume it to be Alcohol.
  
  
  
  Now see, ferrite + Liquid ---> γ
  
  Please note that how the man after heavy drinking has fallen while his legs make a 'γ' symbol (in red). Hope this helps in memorizing this Peritectic reaction quickly. 😀
  
  Other 2 reactions will follow soon.
• 

  sweet_honey

  its a great way to remeber...
  bring such tutorials for other subjects also...
• 

  Ambarish Ganesh

  sweet_honey

  its a great way to remeber...
  bring such tutorials for other subjects also...

  😀 Glad you liked it!
• 

  Ambarish Ganesh

  Now, moving ahead to the second Invariant reaction- Eutectic reaction.
  
  It's this- (at 1130 degree celcius)
  
  Liquid ----> Austenite + Cementite
  
  Now, the liquid as we mentioned earlier is an alcoholic drink, and to the right side of the arrow is specified the Alcoholic Content. Do note the play of colors here.
  
  See, Eutectic wrapped up in 2 minutes! 😀 Happy Learning!