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Meeting MS&T22: Materials Science & Technology
Symposium Development in Light Weight Alloys and Composites
Presentation Title Investigation of the Residual Stress on AlSi10MnMg Alloy with Various Grain Size
Author(s) Minjeong Jeon, Eunkyung Lee
On-Site Speaker (Planned) Minjeong Jeon
Abstract Scope AlSi10MnMg alloy with different initial grain size manufactured by high-pressure die casting(HPDC) and mold casting was subjected to T4 heat treatment and then furnace-cooled and water-quenched to control variables that could affect residual stress in addition to microstructure changes. The average grain size of non-heat treated HPDC and mold casting specimens was 12.21μm, 448.39μm, residual stress was 35MPa, 57MPa, and grain average misorientation(GAM) was 16.42, 12.19°, respectively. The average grain size of furnace-cooled HPDC and mold casting was 13.66μm, 658.81μm, residual stress was 42MPa, 89MPa, and GAM was 19.15°,13.98, respectively. The average grain size of water-quenched HPDC and mold casting specimens was 13.17μm, 123.85μm, residual stress was 56MPa, 67MPa, and GAM was 19.15°,13.98°. As the grain size decreases, the high angle grain boundary fraction is increased, and thus the high value of misorientation is distributed. Also, more dislocation piles up around large grains, resulting in greater residual stress values.

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