Lalvani, Himanshu; Rist, Martin and Brooks, Jeffery W.
|DOI (Digital Object Identifier) Link:||http://doi.org/10.4028/www.scientific.net/AMR.89-91.313|
|Google Scholar:||Look up in Google Scholar|
In order to investigate the influence of δ-phase precipitation during high temperature forging of Inconel 718, hot axi-symmetric compression tests have been performed on specimens with two distinct initial microstructures: i) as-received material containing a dense population of δ precipates at grain boundaries and along intragranular slip planes, and ii) material solution-treated to dissolve the δ phase. Results indicate that the presence of δ leads to a slight increase in peak stress and a proportionately greater post-peak reduction in flow stress, as compared to solution-treated material. For both types of microstructure flow softening is associated with grain refinement, but in different ways: in δ-free material conventional dynamic recrystallisation leads to the formation of new grains, whereas the presence of plate-like δ appears to cause the mechanical break-up and segmentation of prior grains.
|Item Type:||Journal Article|
|Copyright Holders:||2010 Trans Tech Publications Ltd|
|Keywords:||Inconel 718; delta phase; hot deformation|
|Academic Unit/Department:||Mathematics, Computing and Technology > Engineering & Innovation
Mathematics, Computing and Technology
|Depositing User:||Martin Rist|
|Date Deposited:||26 Jan 2010 11:49|
|Last Modified:||15 Jan 2016 12:18|
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