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PACE Technologies Metallographic Preparation CLASS Chart icon

SiC particles in Titanium Matrix Welded to Carbon Steel (MMC)
Specimen Preparation (Class 9 Procedures)
Metallographic Class 9 sample preparation  

Welding of disimilar metals can be challenging due to the individual properties, including melting temperatures and chemical compositions of the various metals. This is complicated more if one or more of the disimilar metals is a composite material. By analyzing the microstructure and the heat affected zone (HAZ), the quality, strength and properties of the metal interface can be examined.

SECTIONING
Diamond Wafering blade - medium grit / low concentration)

MOUNTING
Castable Mounting with Epoxy or Acrylic resins

POLISHING
Abrasive/surface Lubricant Force/ sample Speed
(Head/base)
Time Individual
Force mode
Central Force
mode
70 micron diamond grinding disk*
Water 5-10 lbs 200/200 rpm Planar
  Metallographic central polishing force
30 um DIAMAT diamond
suspension on CERMESH
Metal Mesh cloth
  5-10 lbs 200/200 rpm 5 min Metallographic individual polishing force Metallographic central polishing force
6 um DIAMAT diamond
on TEXPAN polishing pad
SIAMAT
colloidal silica
10 lbs 200/200 rpm 5 min Metallographic individual polishing force Metallographic central polishing force
1 um DIAMAT diamond
on GOLDPAD or ATLANTIS
polishing pad
SIAMAT
colloidal silica
10 lbs 200/200 rpm 5 min Metallographic individual polishing force Metallographic central polishing force
SIAMAT Colloidal silca
on TEXPAN polishing pad
  10 lbs 200/200 rpm 5 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 SiC particles in a titanium matrix welded to carbon steel
SiC-Titanium / Carbon-steel Weld, 200X,
Etched Sarajan's Reagent
(73% DI water, 16% HF, 6% HNO3, 5% HCl)

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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