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I do not see a straightforward way from the relevant characteristics of
Titanium to the claims made.
In terms of the Young modulus and specific gravity, the basic
characteristics determining other properties like speed of sound etc., we
have from Phys. Handbook:
Young modulus (GPa) Specific gravity
Stainless steel 200 7.9
Titanium 109 4.5
Aluminum 70 2.7
In both these characteristics, Titanium is between steel and Aluminum. If
Titanium's mechanical properties are, indeed, responsible for its
performance allegedly superior to that of a steel hammer, then the
Aluminum hammer could be expected to do even a better job.
Also, I did not see in the referenced sources any reproducible
experimental tests; instead, we have just statements based mostly on
personal experience of some workers, most of whom remain unknown except
for their email ID.
At this level, the whole thing seems unsubstantiated.
Moses Fayngold,
NJIT
________________________________
Bob LaMontagne, <RLAMONT@providence.edu>, wrote:
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Sent: Monday, July 13, 2009 7:01:50 PM
Subject: Re: [Phys-l] Energy Transfer with hammers
Sounds a lot like the claims made in ads for selling golf clubs in various
magazines!
Bob at PC
________________________________________
From: phys-l-bounces@carnot.physics.buffalo.edu
[phys-l-bounces@carnot.physics.buffalo.edu] On Behalf Of Jack Uretsky
[jlu@hep.anl.gov]
Sent: Monday, July 13, 2009 6:49 PM
To: Forum for Physics Educators
Subject: Re: [Phys-l] Energy Transfer with hammers
What makes you think that the statements are correct?
Regards,
Jack
On Mon, 13 Jul 2009, chuck britton wrote:
http://www.finehomebuilding.com//item/8391/titanium-hammers-up-for-
grabs-want-one
has an interesting 'claim' about energy transfer.
"My reason for going with titanium: energy. A titanium hammer
transfers 97% of your energy from swinging the hammer to the nail
head, while a steel hammer transfers only 70% of your energy to the
nail. Titanium drives a nail more efficiently and there?s less recoil
energy to travel back into your arm."
This seems to BEG for some simple 'Mechanics' analysis.
Maybe 'Impedance matching'? admittedly - NOT a topic usually covered
in intro mechanics but maybe it SHOULD be?
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Forum for Physics Educators
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--
"Trust me. I have a lot of experience at this."
General Custer's unremembered message to his men,
just before leading them into the Little Big Horn Valley
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