Low Poisson's Ratio metal

[subsearobot]

I am looking for a low poisson's ratio metal (ideally ~.17).
Ideally, a titanium alloy.

We will use it as a "gasket" for a high pressure seal between a glass hemisphere and a metalic housing.

Can anyone help?

thanks in advance!

 

[btrueblood]

It is doubtful that you can achieve low Poisson's ratio in a monolithic, homogenous solid, which (I would think) you would want for a seal. Low poisson's ratio materials, and even negative poisson's ratio, are possible for certain foams - google for them. Cast iron has a low range of possible poisson's ratio, from 0.21 to .25 or so. Could you instead look for a high-ratio glass?

 

[subsearobot]

We need a very special glass (fused silica) for this project. I did a little googling; I found a paper on a Ti alloy that had a .14 ratio. I am guessing that's in the lab, on a 0.5 gram sample, however...

I will keep looking, thanks.

 

[saberblue]

Try contacting the Titanium producers association they might be able to help

A.R. "Andy" Nelson
Engineering Consultant
anelson@arnengineering.com

 

[RPstress]

According to MIL-HDBK-5 standard grade beryllium comes out at 0.10.