Fellow TechNetters;

   Is there anyone out there with experience with CFA cross section and
chemical etchants to delineate grain boundary?   Do not have the
specific CFA alloy.
I used the following chemical etchant:
No. 5 Keller's etch        HF (conc)        1.0ml
			HCL  (conc)      1.5ml
			HNO3  (conc)    2.5ml
			H20                95.0ml	


Immerse for 10-20 sec; wash in stream of warm water,   Microstructure of
duraluminum type alloy.  17ST, AND ALCLAD

Not able to se grain boundary.

vic,

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------