[TheForge] New metal alloys overcome strength-ductility tradeoff

[Rob Fertner]

Hi Mike,
I realize the odds of getting any new stock of any new alloy are pretty
slim. But sooner or later some of it will end up scrapped and scrounged.
Wichita is an aircraft town and we've come across some weird forging scrap
on occasion. So this new stuff will be a PITA to forge also.
Thanks.

Rob
Wichita, KS

-----Original Message-----
From: TheForge [mailto:theforge-bounces at mailman.qth.net] On Behalf Of
Michael via TheForge
Sent: Monday, May 23, 2016 8:38 AM
To: theforge at mailman.qth.net
Cc: newenglandforge at aol.com
Subject: Re: [TheForge] New metal alloys overcome strength-ductility
tradeoff


Hey Rob,
I think to start with, we need to assume that the more alloyed the steel,
the more difficult it is to forge, and the lower the melting temperature.
The dual phase alloys and precipitation hardening alloys are much harder
when in the annealed state than standard quench and temper materials, i.e.
HRC 35 or higher when annealed, thus much harder to forge.  The forging
temperature forging range is also very narrow and you need at least a power
hammer to forge them.  The steel alloys developed in the 20th Century were
all developed to serve a specific purpose, stainless steels now number over
250 grades, again each to do a specific job, so if you are looking for an
alloy that is easily forged, easily forge welded, wide forging range, safe
to forge at lower temps, think low carbon or iron.   Also, these new
materials often require very specialized equipment to forge, as they are
first forged to an oversize, then (a dwell) allowed to cool from the initial
forging temp to a much low
 er temperature like 1400F, then the final blow(s) "warm work-harden" the
forging to very high strengths.  I'm not strong enough to do much reduction
of a piece at 1400F and even a small drop hammer wouldn't be able to do the
required reduction.  Then there is availability, most of us call these
materials "Unobtainable Alloys", as a smith, your chance of getting some to
try is near non-existent.
-Mike Schermerhorn
Boston



-----Original Message-----
From: Rob Fertner <rfertner at cox.net>
To: 'Blacksmithing List Sponsored by ABANA' <theforge at mailman.qth.net>
Sent: Fri, May 20, 2016 7:02 pm
Subject: [TheForge] New metal alloys overcome strength-ductility tradeoff


New alloys are being developed. I wonder how forgeable they'll be?

http://phys.org/news/2016-05-metal-alloys-strength-ductility-tradeoff.html


Rob
Wichita, KS


______________________________________________________________
TheForge mailing list
Home: http://mailman.qth.net/mailman/listinfo/theforge
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:TheForge at mailman.qth.net

TheForge mail list group photo site is
http://www.shutterfly.com
Login: blacksmithblacksmith at hotmail.com
Password: anvil

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to newenglandforge at aol.com

______________________________________________________________
TheForge mailing list
Home: http://mailman.qth.net/mailman/listinfo/theforge
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:TheForge at mailman.qth.net

TheForge mail list group photo site is
http://www.shutterfly.com
Login: blacksmithblacksmith at hotmail.com
Password: anvil

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to rfertner at cox.net