MI updates

1. Team Members
Akash Gupta
Dipen Patel

2.  Establish process-structure linkages for AM30 Magnesium alloy during channel-die
compression.
 These linkages will reveal the effect of process parameters like temperature,
strain rate and % strain on the evolution of texture during channel-die
compression.
 Source of Dataset - Orientation map datasets generated from EBSD test done on
channel die compressed samples are provided by Prof Haitham El Kadiri,
Mississippi State University

3.  Channel die tests allows the faces of the sample to remain plane (homogeneous
deformation) while being compressed and prevent any lateral spreading.
 EBSD datasets containing orientation maps are generated at different processing
conditions of temperature, strain rate and strain level
Schematic diagram of (a) assembled channel
die, and (b) various parts of channel die
Ref: Antonyraj, A., Marin, E., Ma, Q., Wang, P., Horstemeyer, M.,
& King, R. (Oct 2010). TMS 2011, California
Temp(deg C) Strain rate (1/s)
Strain
0% 3% 6% 9% 18%
RT 1
0.1 1 1 1
0.01 1 1
0.001 1 1 1 1
Strain
0% 30% 60% 73% 90%
1
0.1 1 1 1
0.01 1 1 1
0.001 1 1 1
1
0.1 1 1 1
0.01 1 1 1 1
0.001 1 1 1
0
0.1 1 1 1
0.01 1 1 1
0.001 1 1 1
Total microstructures = 40
200
300
400

4.  2-D pixel data containing
crystal orientations for Mg
alloy polycrystalline
material generated at
different processing
conditions.
300C EBSD
DATA
10-1
10-2
10-3
0% 60% 73% 90%
STRAI
N
RATE
STRAIN

5.  Extracting orientations from .oim files and Image Segmentation
 Microstructure function – h (crystal orientations)
 Number of local states too high if we bin the microstructure using fundamental
zone for hexagonal(depends on bin size)
 Alternative approach is using GSH to generate n-point statistics