|About this Abstract
|2022 TMS Annual Meeting & Exhibition
|Ultrafine-grained and Heterostructured Materials (UFGH XII)
|Strain Hardening and Ductility by Grain Refinement-induced Plasticity in Multi-level Hetero-structured Brass
|On-Site Speaker (Planned)
Grain refinement in metals has dual effects of strengthening and strain hardening, but it seldom occurs during tensile deformation. Here we report a dynamic grain refinement induced plasticity and strain hardening during tensile deformation in a Cu-30% Zn (wt percent) alloy processed by cold rolling followed by recrystallization annealing. The initial heterogeneous tri-modal grain structure was designed on purpose from high to low including micrometer-, ultrafine-, and nano-grains. To be specific, nano-grains are mostly corner twins located at grain boundaries and triple junctions of ultrafine-grains. Upon tensile straining, the successive generation of corner twins which later evolves into nano-grains causes the dynamically reinforced grain refinement-induced plasticity (GRIP) effect to produce a superior strength and ductility synergy especially at the high strength level, making an inversed strength-and-ductility banana relationship.
|Mechanical Properties, Nanotechnology, Process Technology