The mechanics of superplastic forming: how to incorporate and model superplastic and superplastic-like conditions

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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Abstract

Much work has been carried out in understanding the mechanics of superplasticity (SP). Some of the present challenges in SP forming revolve around the use of lower forming temperatures and faster strain rates, which may involve pushing the process boundaries to incorporate “superplastic-like” forming – perhaps also in materials with non-optimized microstructures. For process optimization there is a requirement to be able to model both within the SP and superplastic-like processing window in an integrated way. From a mechanics point of view the presence of high rate sensitivity is often seen as the key factor in controlling SP response. However, changes in phase distribution and grain morphology, or the accumulation of damage (cavitation) may compromise this assumption. The paper will examine the range of validity of some SP constitutive models and how they may be adapted to take into account processing routes that may incorporate superplastic-like and more conventional SP deformation modes.
Original languageEnglish
Title of host publicationMaterials Science Forum
Place of PublicationSwitzerland
Pages468-475
Number of pages8
Volume838-839
DOIs
Publication statusPublished - 8 Jan 2016
Event12th International Conference on Superplasticity in Advanced Materials, ICSAM 2015 - Tokyo, Japan
Duration: 7 Sep 201511 Sep 2015

Publication series

NameMaterials Science Forum
Volume838-839
ISSN (Print)02555476

Conference

Conference12th International Conference on Superplasticity in Advanced Materials, ICSAM 2015
Country/TerritoryJapan
CityTokyo
Period7/09/1511/09/15

Keywords

  • constitutive modelling
  • superplastic
  • finite element
  • visco-plastic

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