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PROCESS-STRUCTURE LINKAGES FOR CHANNEL–DIE COMPRESSED
AM30 MAGNESIUM ALLOY
Team Members
Akash Gupta
Dipen Patel
PROJECT DESCRIPTION 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
PROCESS DATA 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 levelTemp(deg C) Strain rate (1/s)
0% 3% 6% 9% 18%RT 1
0.1 1 1 10.01 1 1
0.001 1 1 1 1
0% 30% 80% 130% 180%1
0.1 1 10.01 1 1 1
0.001 1 1 11
0.1 1 1 10.01 1 1 1 1
0.001 1 1 11
0.1 1 1 10.01 1 1 1
0.001 1 1 1
40Total microstructures =
Strain
Strain
200
300
400
Schematic diagram of (a) assembled channel die, and (b) various parts of channel dieRef: Antonyraj, A., Marin, E., Ma, Q., Wang, P., Horstemeyer, M., & King, R. (Oct 2010). TMS 2011, California
STRUCTURE DATA 2-D pixel data containing
crystal orientations for Mg alloy polycrystalline material generated at different processing conditions.
300C EBSD DATA
10-2
10-3
10-
1
80% 130% 180%0%
PRESENT STATUS AND WAY FORWARD
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