|About this Abstract
||Materials Science & Technology 2019
||Late News Poster Session
||P2-20: Processing-structure-property Relations in 70/30 Brass with Spatially Varying Grain Size Distributions
||Nicholas James Breeuwer, Daniel J Lewis, Milo V Kral, Catherine M Bishop
|On-Site Speaker (Planned)
||Catherine M Bishop
Spatial variations in alloy grain size result from common processes such as forming and casting. Non-uniform grain sizes cause non-uniform properties, including strength, creep resistance and corrosion resistance, that are important for mechanical design. Quantifying the microstructure in non-uniform samples and understanding the relationship between processing and microstructure was the aim of this work.
A simple method was developed to create samples using tensile specimens with non-uniform gage cross sections in the model alloy 70/30 brass. Finite element analysis and digital image correlation were used to design and validate particular non-uniform plastic strain profiles. Non-uniform grain sizes as a function of distance along the gage were obtained after annealing.
The spatial variation of grain size distribution determined from large-scale optical images was characterised. The relationships between plastic strain, recrystallised grain size and hardness were determined. Grain growth behaviour of non-uniform samples was studied for the first time.