How Chipping of Edges Happens at a Microscopic Level

[Larrin]

New article on chipping of edges where I attempted to answer questions such as:

What is toughness testing actually measuring?
Is there a difference between chipping an edge in one hit vs several?
Does retained austenite lead to more chipping?

http://knifesteelnerds.com/2018/05/28/chipping-of-edges/

 

[Dave Martell]

Great article Larrin, thanks.

 

[Larrin]

Great article Larrin

Thanks Dave.

 

[Kippington]

This is my favorite article of yours so far, thanks for posting!
Those thermodynamic software calculations have helped me improve my heat treating regime, let me know what you think:

Step 1: Austenitize at 1475°F and hold indefinitely.
Step 2: ...

Possible Step 3: Quench facing North?

:laugh:

But seriously, the collection of information in the public domain that you (and a few others such as Verhoeven, Cashen, Bhadeshia) have put out over the last few years is immense. Far more than a bladesmith needs to know (yet we're always wanting more), and so much better than the strange 'knowledge' we had floating around 10+ years ago.

Much appreciated! :thumbsup:

 

[Lazyboy]

Now I have a slightly less opaque understanding of why PM steels have the properties they do. Thanks for posting.

 

[Larrin]

Allowing the steel to reach thermodynamic equilibrium is rarely the result that you want. Never give the steel what it wants.

 

[Larrin]

Now I have a slightly less opaque understanding of why PM steels have the properties they do.

Me too!