Strain induced martensite in incremental forming - Formation, effect and control

Tuomas Katajarinne, Seppo Kivivuori

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

1 Citation (Scopus)

Abstract

Stainless steels are increasingly today applied in industrial use. The metastable structure of austenitic stainless steels enables strain induced martensite formation during plastic deformation. Thus, in order to effectively apply these steels in incremental sheet forming (ISF), it is essential to know their α'-martensite transformation tendency in the process. For the four different austenitic stainless steels in the present study, the transformation was found to be very sensitive to the applied process parameters. The martensite formation was more profound with the unstable grades, however, with external heating the martensite formation could be diminished. By optimizing the ISF process, the amount of transformed martensite can be controlled and products with exceptional property combinations can be produced. The novelty of the present paper is to, first, provide information on the influence of strain induced martensite on the incremental forming process and product properties. In addition, based on the observations, propose means to control the transformation. Furthermore, the paper establishes that ISF favours a moderate rate of martensite transformation for extreme formability.

Original languageEnglish
Title of host publicationAdvances in Materials and Processing Technologies XV
Pages119-129
Number of pages11
Volume773-774
DOIs
Publication statusPublished - 2014
MoE publication typeA4 Article in a conference publication
EventInternational Conference on Advances in Materials and Processing Technologies
- Wollongong, Australia
Duration: 23 Sep 201226 Sep 2012
Conference number: 15

Publication series

NameMaterials Science Forum
Volume773-774
ISSN (Print)02555476

Conference

ConferenceInternational Conference on Advances in Materials and Processing Technologies
Abbreviated titleAMPT
CountryAustralia
CityWollongong
Period23/09/201226/09/2012

Keywords

  • Extreme formability
  • Forming forces
  • Incremental sheet forming
  • Material property control
  • Strain induced martensite

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