MAE203
Lab Report # 2: Metallography sample preparation, etching,
microstructure (SEM) (15 points)
(Individual submission)
Class session (Day and time):
Submission date (mm/dd/yyyy):
Student Name:
Student Signature:
List names of your group members:
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MAE203
Please include optical microscope images of the surface of brass sample for the following
conditions:
1. As-received brass and aluminum sample surface: (2 points)
a) Optical microscope (brass)
Scanning electron microscope (SEM) (brass)
b) Optical microscope (aluminum)
Scanning electron microscope (SEM) (aluminum)
2. Brass and aluminum sample surface after grinding with a 600 grit SiC paper: (2
points)
a) After 10 minutes (brass):
b) After 10 minutes (aluminum):
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3. Brass and aluminum sample surface after polishing with 6 micron diamond paste:
(2 points)
a) After 10 minutes (brass):
b) After 10 minutes (aluminum):
4. Brass and aluminum sample surface after polishing with 1 micron diamond paste:
(2 points)
a) After 10 minutes (brass):
b) After 10 minutes (aluminum):
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5. Brass and aluminum sample surface after etching with suitable etchants: (2 points)
a) Brass:
Optical microscope (brass)
Scanning electron microscope (SEM) (brass)
c) Aluminum:
Optical microscope (aluminum)
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6. Do the grain size analysis from SEM image of etched Brass (posted on CANVAS)
using Fiji-ImageJ software. Plot the histogram using excel and calculate d50 value. (5
points) (You must show the steps of image analysis same as shown in lab report#3 of
grain size analysis using ImageJ (Fiji), otherwise you will receive zero points).
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