Re: [meteorite-list] Patterns in Meteorwrong
Hello All, Regarding Widmanstatten patterns in meteorites and terrestrial iron... The typical problem that most run into is with cosmically (or possibly terrestrially) reheated/recrystallized irons that oftentimes share an uncanny resemblance in structure to terrestrially manufactured metal. In many cases, especially with some of the smaller NWA and Antarctican irons (which tend to have odd physical characteristics and chemical traits), the irons will exhibit only the faintest pattern, or sometimes simply a fine-grained sparkly-looking etched surface. This is macroscopically indistinguishable from the crystal patterns that commonly form in metal that has been put through common manufacturing practices, as it cools slowly enough to form a small crystal pattern that makes up a remarkably similar physical appearance. So, do terrestrial pieces of iron exhibit Widmanstatten patterns? No, not really, but they can display something that's not too far off Regards, Jason On 2/4/07, Steve Dunklee [EMAIL PROTECTED] wrote: I have found what looks similar to widmanstatten pattern in metal parts especially rail car parts that have received years of pounding under the pressures involved with towing cars weighing around 263k lbs with a string of 30 or more cars I imagine there is a lot of force involved. Most of the ones I have observed are parallel lines radiating from the impact point. I will have to check back thru my junk pile to see if I can find any . I am sure there are probably some metalurgist around here that can direct you to more information on stress fractures in metal. Best regards Steve -- Be a PS3 game guru. Get your game face on with the latest PS3 news and previews at Yahoo! Games. http://us.rd.yahoo.com/evt=49936/*http://videogames.yahoo.com __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Patterns in Meteorwrong
I have found what looks similar to widmanstatten pattern in metal parts especially rail car parts that have received years of pounding under the pressures involved with towing cars weighing around 263k lbs with a string of 30 or more cars I imagine there is a lot of force involved. Most of the ones I have observed are parallel lines radiating from the impact point. I will have to check back thru my junk pile to see if I can find any . I am sure there are probably some metalurgist around here that can direct you to more information on stress fractures in metal. Best regards Steve - Be a PS3 game guru. Get your game face on with the latest PS3 news and previews at Yahoo! Games.__ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Patterns in Meteorwrong
I have a comment. There is no Widmanstatten pattern in meteorwrongs. End of discussion. So, lets not start another BS tread that will be harder to endure than a stick in the eye. Thanks From: Gary K. Foote [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] Patterns in Meteorwrong Date: Sat, 03 Feb 2007 11:10:37 -0500 Along the lines of the discussion on whether or not Widmanstatten patterns appear in non- meteoric materials I have put up some pictures of a meteorwrong with definite crystalized interior patterns. Anyone have any cogent comments on this? I'm quite interested... http://www.meteorite-dealers.com/images/slag-closeup.jpg Gary __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list _ Get in the mood for Valentine's Day. View photos, recipes and more on your Live.com page. http://www.live.com/?addTemplate=ValentinesDayocid=T001MSN30A0701 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Patterns in Meteorwrong
Not trying to start a BS thread - just trying to understand what I am seeing. Thanks for your input. Gary On 3 Feb 2007 at 9:23, Howard Steffic wrote: I have a comment. There is no Widmanstatten pattern in meteorwrongs. End of discussion. So, lets not start another BS tread that will be harder to endure than a stick in the eye. Thanks From: Gary K. Foote [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] Patterns in Meteorwrong Date: Sat, 03 Feb 2007 11:10:37 -0500 Along the lines of the discussion on whether or not Widmanstatten patterns appear in non- meteoric materials I have put up some pictures of a meteorwrong with definite crystalized interior patterns. Anyone have any cogent comments on this? I'm quite interested... http://www.meteorite-dealers.com/images/slag-closeup.jpg Gary __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list _ Get in the mood for Valentine's Day. View photos, recipes and more on your Live.com page. http://www.live.com/?addTemplate=ValentinesDayocid=T001MSN30A0701 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
