Microstructure development and superplasticity in Inconel 718 sheet
Microstructure development and superplasticity in Inconel 718 sheet
Within the range of temperatures and strain rates investigated, mechanical testing identified the optimum forming condition for Inconel 718 sheet as being 965°C with a strain rate of 10-4 s-1. A detailed investigation of the microstructural behaviour under these deformation conditions was carried out and is reported here. Typically superplastic deformation would generate an enhanced rate of grain growth. This was not the case with the present material; instead it was found that a slight apparent grain size reduction occurred and there was evidence of substantial dislocation activity. It was concluded that the material was deforming on the borderline between 'true' superplasticity and normal slip based deformation.
461-466
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Blackwell, Paul L.
1f011a1a-541c-45fa-8ce9-0c7cb780fead
April 2003
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Blackwell, Paul L.
1f011a1a-541c-45fa-8ce9-0c7cb780fead
Huang, Yi and Blackwell, Paul L.
(2003)
Microstructure development and superplasticity in Inconel 718 sheet.
Materials Science and Technology, 19 (4), .
(doi:10.1179/026708303225002000).
Abstract
Within the range of temperatures and strain rates investigated, mechanical testing identified the optimum forming condition for Inconel 718 sheet as being 965°C with a strain rate of 10-4 s-1. A detailed investigation of the microstructural behaviour under these deformation conditions was carried out and is reported here. Typically superplastic deformation would generate an enhanced rate of grain growth. This was not the case with the present material; instead it was found that a slight apparent grain size reduction occurred and there was evidence of substantial dislocation activity. It was concluded that the material was deforming on the borderline between 'true' superplasticity and normal slip based deformation.
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Published date: April 2003
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 196279
URI: http://eprints.soton.ac.uk/id/eprint/196279
ISSN: 0267-0836
PURE UUID: c3f03c54-ad3f-48b7-80c7-539202c30abb
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Date deposited: 06 Sep 2011 08:22
Last modified: 15 Mar 2024 03:39
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Author:
Yi Huang
Author:
Paul L. Blackwell
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