[meteorite-list] Etching Iron Meteorites

From: Drake <Monel_at_meteoritecentral.com>
Date: Thu, 1 Feb 2007 05:06:13 -0500
Message-ID: <021f01c745e8$9be035c0$7400a8c0_at_DADS>

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" Damer?u
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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Received on Thu 01 Feb 2007 05:06:13 AM PST