Modelling the void deformation and closure by hot forging of ingot castings

Peter Christiansen, Jesper Henri Hattel, Petr Kotas, Vladimis Lászlo

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

After solidification and cooling cast ingots contain voids due to improper feeding and volume shrinkage. Such voids are normally unwanted, so besides of forming the ingot to the desired shape, one of the purposes of the post processing of the ingot by hot forging is to close such voids by mechanical deformation. The aim of this paper is to analyze numerically if and to what degree the voids areclosed by the forging. Using the commercial simulation software ABAQUS, both simplified model ingots and physically manufactured ingots containing prescribed void distributions are deformed and analyzed. The analysis concernsboth the void density change and the location of the voids in the part after deformation. The latter can be important for the subsequent reliability of the parts, for instance regarding fatigue properties. The analysis incorporates the Gurson yield criterion for metals containing voids and focuses on how the voids deform depending on their size and distribution in the ingot as well ashow the forging forces are applied.
Original languageEnglish
Title of host publicationProceedings of 1st International Conference on Ingot Casting, Rolling and Forging
Number of pages9
Publication date2012
Publication statusPublished - 2012
Event1st International Conference on Ingot Casting, Rolling and Forging: Rolling and Forging – Technology - Aachen, Germany
Duration: 3 Jun 20127 Jun 2012
http://icrf2012.com/

Conference

Conference1st International Conference on Ingot Casting, Rolling and Forging
CountryGermany
CityAachen
Period03/06/201207/06/2012
Internet address

Keywords

  • Ingot forging
  • Void defect evolution
  • Die geometry
  • Void distribution
  • Gurson model
  • Numerical simulation

Cite this

Christiansen, P., Hattel, J. H., Kotas, P., & Lászlo, V. (2012). Modelling the void deformation and closure by hot forging of ingot castings. In Proceedings of 1st International Conference on Ingot Casting, Rolling and Forging