Hmmn, apologies if this has appeared previously, but for some reason my reader seems to think that it disappeared into the electronic aether, and Google couldn't find a record of it in archive.
I've checked through the latest issue of the ASM Handbook Volume 13A, Corrosion: Fundamentals, Testing, and Protection, but would appreciate any other contributions.
Any help gratefully received.
Regards,
Pete
------------- Peter J Gibs> Gents,
does anyone have any hard test data regarding Solid Metal Induced
> Embrittlement, specifically with respect to the effect of Cadmium on > Titanium?
>
> Google provided plenty of "don't even think about it", however I
> cannot find any actual hard information?
>
> The usual Mil-Specs/Mil-Hdbks gave conflicting information relating to
> situations where Cadmium may cause embrittlement
> e.g.
>
> Mil-Hdbk-697 states "...in the case of titanium alloys, molten
> cadmium will cause cracking..." (ie above 250°C/450°F)
> Mil-Std-889 states "...Cadmium coating is prohibited on Titanium..."
> Mil-S-5002 states "...under certain conditions, titanium can be
> embrittled by contacting cadmium or silver components. Embrittlement
> has been determined to occur in cadmium plated titanium parts at
> temperatures as low as 150°F..."
> Mil-Hdbk-1568 states "... Titanium parts shall not be cadmium or
> silver plated. Cadmium plated clamps, tools, fixtures and jigs shall
> not be used for fabrication or assembly of titanium components or > structures."
>
> Presumably someone must have done some extensive studies into the
> effect of SMIE of Cd/Ti? Are the results of these studies available
> in the Public Domain, or are they purchasable?
>
> Is there any place where there are details regarding diffusion
> constants and/or critical pressure/stress concentrations or time > dependencies?
>
> Any pointers gratefully received.
>
> Cheers,
>
> Peter
> ;o)