Effect of grain size on macroscopic phase transition stress hysteresis of polycrystalline materials
Qingpingng SUN (Hong Kong Univ. of Sci. & Tech)
Instability in Solids and Structures
Mon 9:00 - 10:30
Barus-Holley 190
In this talk, we present recent experimental and theoretical work on the roles of grain size in the instability and macroscopic stress hysteresis during stress-induced phase transition of nanostructured polycrystalline shape memory alloys. We found that when the grain size is reduced to a few nanometers, both stress hysteresis and the temperature dependence of stress vanishes due to the lacks of instability and two phase co-existence.