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PACE Technologies Metallographic Preparation CLASS Chart icon

7075 Aluminum Alloy
Specimen Preparation (Class 1 Procedures)
Metallographic Class 1 sample preparation

The difficulty in preparing these materials arises from the fact that these materials have oxide inclusions in the microstructure. Proper specimen preparation retains these oxides and thus eliminates scratching and smearing from these particles. If the specimen is not prepared properly, the microstructure will not be accurately represented.

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
P120 grit ALO paper*
P220 grit ALO paper*
Water 5-10 lbs 100/100 rpm Planar
1 min
  Metallographic central polishing force
P500 grit ALO paper
P1200 grit ALO paper
Water 5-10 lbs 100/100 rpm 1 min
1 min
Metallographic individual polishing force Metallographic central polishing force
1 um DIAMAT diamond
on ATLANTIS polishing pad
Water 5-10 lbs 100/100 rpm 2 min Metallographic individual polishing force Metallographic central polishing force
0.05 um Nanometer alumina
on NAPPAD polishing pad
  5-10 lbs 100/100 rpm 1 min Metallographic individual polishing force Metallographic central polishing force

*Required for central polishing force. Click here for more information on central vs. individual polishing force polishing.

Metallographic micrograph of 7075 aluminum alloy
7075 Aluminum Alloy, Etched Kellers Reagent, 200X

ETCHING

Common Etchants
PACE Technologies Recommended Etchants

PACE Technologies Etchant Database

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.


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email: pace@metallographic.com
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Metallographic
Consumables

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PACE TECHNOLOGIES® - 3601 E. 34th St., Tucson, AZ 85713, USA
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