Engine building mailing list?

[Greg Hermann]

>At 10:26 AM 11/19/98 -0800, you wrote:
>>Hi Barrett
>>
>>What's hipping?
>>
>
>HIP = Hot Isostatic Press. Put the material in a sealed furnace and
>apply a gas pressure at elevated temperatures to it in order to
>remove any closed flaws (pores, etc) in the part. Used for things
>like turbine blades where creep deformation has resulted in
>internal cavity formation. The small lab HIP that I use for sinter
>/ HIP'ing silicon nitride can go to about 2100 C (3800 F) and 200
>MPa (20,000 psi) in nitrogen or argon.

OK--but is it primarily for sintered (powdered metallurgy) parts), or is it
also applicable to more conventional billets/forgings, etc.??

Regards, Greg
>
>Jay