|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||Solidification Processing of Light Metals and Alloys: An MPMD Symposium in Honor of David StJohn
||A Brief History of Grain Refinement
||Mark A. Easton, Ma Qian, Michael Bermingham, Peng Cao
|On-Site Speaker (Planned)
||Mark A. Easton
One of the key technologies in light metals solidification processing is how to control the grain size. A fine equiaxed microstructure has a number of benefits including the reduction in defects such as hot tearing and porosity size, improved homogeneity of properties and improved performance of post-processing operations. This presentation will discuss the development of the interdependence theory as a method for understanding and predicting grain size changes. It will also discuss how its application has led to a number of commercial applications including a reduction in the cost of grain refining additions in aluminium billets, the optimization of additions to Al-Si foundry alloys, the development of a magnesium grain refiner (microZir), understanding of grain refinement using ultrasonics, titanium grain refinement and most recently in additive manufacturing.