|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Deformation and Transitions at Interfaces
||Blocky Alpha Grain Growth in Zircalloy4
||Vivian Tong, T Ben Britton
|On-Site Speaker (Planned)
||T Ben Britton
Grain boundaries are an important microstructural feature, often conferring improved mechanical properties. In materials engineered to have a fine microstructure and uniform texture (e.g. Zircaloy 4), the growth of very large grains (from ~10 μm to >1 mm) in thin parts is not desired. This process may occur due to abnormal grain growth mechanisms which initiate during annealing after low strain deformation. We use a combination of thermomechanical processing and characterisation (EBSD, DIC and HR-EBSD) to understand phenomena of blocky alpha grain growth and the role of different deformation mechanisms on the ultimate grain size and texture in Zr4. We observe striking textures and grain morphologies as a result of particular processing strategies due to deformation near particular grain boundaries. We correlate ultimate grain size, shape and texture with the sense and magnitude of strain applied, and relate these to mechanisms producing the final grain structure and texture.