[meteorite-list] Etching Iron Meteorites

[Drake]

You must have misread my post. I did not say high carbon steels had
Widmanstatten structures. To the contrary, the alloys I listed do not
have any carbon at all. The only steel I listed was HSLA and I mentioned
that it is difficult to get Widmanstatten patterns in them. 

Pearlite is not the same as Widmanstatten, nor is martensite or bainite.
Pearlite is a structure made of iron and iron carbide and only found in
heat treated steels with carbon contents over 0.20% by weight.

To confirm this, all you need to do is ask a professional metallurgist,
but then that’s what I am. 

Drake

Quis Custodiet Ipsos Custodes

Drake "Doc" Dameräu
President, NEPRA
NAR Section 614
L3CC member
TRA 9934 L3
 
www.nepra.com
www.rocketmaterials.org 
http://home.sprynet.com/~monel/home.htm 

 
 


> -----Original Message-----

> From: meteorite-list-bounces at meteoritecentral.com

[mailto:meteorite-list-

> bounces at meteoritecentral.com] On Behalf Of Mr EMan

> Sent: Wednesday, January 31, 2007 10:09 PM

> To: Gerald Flaherty; Sterling K. Webb; Drake; meteorite-

> list at meteoritecentral.com

> Subject: Re: [meteorite-list] Etching Iron Meteorites

> 

> Dear Jerry, Why do you say "WOW!"? just WOW?  I enjoy

> a good discussion like everyone else so imagine my

> disappointment in opening posts that just say Wow or

> Cool or Gosh... It is better to interact like this is

> a message board and not a chat room, in my opinion. If

> we all do so it will knock my mailbox down to under

> 200 messages a day. Thank you. Now to the discussion

> at hand.

> 

> So while some were moved to awe at this alleged

> revelation, the fact remains to be proven that the

> pearlite/ferrite/cementite patterns in high carbon

> steel are correctly identified as Widmanstatten

> patterns proper. They are micro structures and not

> visible ASAIK to the naked eye. Plus they are

> artifacts of human industry. We have yet to have Drake

> confirm that these are other occurrences of

> Widmanstatten patterns found in other than meteorites.

> 

> Elton

> 

> --- Gerald Flaherty <grf2 at verizon.net> wrote:

> 

> > WOW!

> > Jerry Flaherty

> 

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