A computational study of plastic deformation in AISI 304 induced by surface mechanical attrition treatment

X. C. Zhang, J. Lu, San-Qiang Shi

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

As a technique of grain refinement process by plastic deformation, surface mechanical attrition treatment (SMAT) has been developed to be one of the most effective ways to optimize the mechanical properties of various materials including pure metals and alloys. SMAT can significantly reduce grain size into nanometer regime in the surface layer of bulk materials, providing tremendous opportunities for improving physical, chemical and mechanical properties of the materials. In this work, a computational modeling of the surface mechanical attrition treatment (SMAT) process is presented, in which Johnson-Cook plasticity model and the finite element method were employed to study the high strain rate, elastic-plastic dynamic process of ball impact on a metallic target. AISI 304 steel with low stacking fault energy was chosen as the target material. First, a random impact model was used to analyze the statistic characteristics of ball impact, and then the plastic deformation behavior and residual stress distribution in AISI 304 stainless steel during SMAT were studied. The simulation results show that the compressive residual stress and vertical deformation of the surface structures were directly affected by ball impact frequency, incident impact angle and ball diameter used in SMAT process.
Original languageEnglish
Title of host publicationISCM II and EPMESC XII - Proc. of the 2nd Int. Symposium on Computational Mechanics and the 12th Int. Conf. on the Enhancement and Promotion of Computational Methods in Engineering and Science
Pages328-333
Number of pages6
Volume1233
EditionPART 1
DOIs
Publication statusPublished - 24 Aug 2010
Event2nd International Symposium on Computational Mechanics, ISCM II, and the 12th International Conference on the Enhancement and Promotion of Computational Methods in Engineering and Science, EPMESC XII - Hong Kong, Macau, Hong Kong
Duration: 30 Nov 20093 Dec 2009

Conference

Conference2nd International Symposium on Computational Mechanics, ISCM II, and the 12th International Conference on the Enhancement and Promotion of Computational Methods in Engineering and Science, EPMESC XII
Country/TerritoryHong Kong
CityHong Kong, Macau
Period30/11/093/12/09

Keywords

  • Johnson-Cook plasticity
  • plastic deformation
  • random impact
  • surface mechanical attrition treatment

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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