Titanium and Titanium Alloys
Specimen Preparation (Class 6 Procedures)
Titanium alloys are very useful because they have a good strength to weight ratio. This makes them idea for use in areas ranging from areospace to sports equipment. Preparation of titanium and titanium alloys is fairly straight forward by conventional metallographic techniques.
For final polishing a method known as Attack Polishing using a combination of colloidal silica and hydrogen peroxide combined with Kroll's reagent has been demonstrated to produce an excellent final metallographic surface finish for titanium and titanium alloys.
SECTIONING
MAXCUT Abrasive blade (Cat. No. MAX-C or MAX-I series)
MOUNTING
Compression Mounting with Phenolic, Epoxy or Diallyl Phthalate compression mounting resins
POLISHING
Abrasive/surface |
Lubricant |
Force/ sample |
Speed
(Head/base) |
Time |
Individual
Force mode |
Central Force
mode |
120 grit SiC paper*
240 grit SiC paper*
|
Water |
5-10 lbs |
200/200 rpm |
Planar
1 min
|
|
|
360 grit SiC paper
600 grit SiC paper
|
Water |
5-10 lbs |
200/200 rpm |
1 min
1 min |
|
|
9 um DIAMAT diamond
on POLYPAD polishing pad |
DIALUBE Purple
Extender |
5 lbs |
200/200 rpm |
3 min |
|
|
6 um DIAMAT diamond
on TEXPAN polishing pad |
DIALUBE Purple
Extender |
5 lbs |
200/200 rpm |
3 min |
|
|
1 um DIAMAT diamond
on GOLDPAD polishing pad |
DIALUBE Purple
Extender |
5-10 lbs |
200/200 rpm |
2 min |
|
|
Titanium Attack mixed
with Kroll's reagent on
MICROPAD polishing pad |
|
5-10 lbs |
200/200 rpm |
5-10 min |
|
|
*Required for central polishing force. Click here for more information on central vs. individual polishing force polishing.
|
Ti6Al4V titanium alloy, 400X (DIC), etched
|
|
Wrought Titanium, 200X (BF), Etchant Ammonium Bifluoride.
|
|
Alpha-rich Case Wrought Titanium, 200X (BF).
|
ETCHING
CAUTION:Safety is very important when etching. Be sure to wear the appropriate protective clothing and observe all WARNINGS on chemical manufacuters SDS (Safety Data Sheets). Also review the COMMENTS and CONDITIONS Section for each etchant.
PACE TECHNOLOGIES CONTACT
PACE Technologies
3601 E. 34th St.
Tucson, Arizona 85713
+1-520-882-6598
FAX +1-520-882-6599
email: pace@metallographic.com
https://www.metallographic.com
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