Improving the formability of stainless steel 321 through multistep deformation for hydroforming applications

Download
  1. (PDF, 1 MB)
  2. Get@NRC: Improving the formability of stainless steel 321 through multistep deformation for hydroforming applications (Opens in a new window)
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleTransactions of the Canadian Society for Mechanical Engineering
ISSN0315-8977
Volume37
Issue1
Pages3952; # of pages: 14
SubjectAerospace alloys; Heat treatment parameters; Intermediate heat treatment; Micro-structure evolutions; Multistep forming; Strain-induced martensite; Tube hydroforming; Uniaxial tensile testing; Alloys; Austenitic stainless steel; Automotive industry; Formability; Heat treatment; Microstructure; Stainless steel; Stress relief; Tensile testing; Tubes (components); Deformation
AbstractTube hydroforming (THF) is a well established process in the automotive industry and its application is being extended to the aerospace for manufacturing complex geometries. However, most of the alloys used in aerospace are high in strength and low in formability, which renders the application of THF more challenging. The objective of this paper is to present a method to increase the formability of an austenitic stainless steel. A multistep forming process was simulated through interrupted uniaxial tensile testing experiments to study the influence of the latter process on formability. The tensile test was divided into several deformation steps with a stress relief heat treatment after each forming step. The results indicated that the application of intermediate heat treatments considerably increased the formability of the stainless steel 321 alloy (SS321). Microstructure evolution as a function of deformation or heat treatment parameters was also investigated and revealed the formation of strain-induced martensite after the first deformation and heat treatment cycle without any deleterious effect on formability enhancement.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Aerospace
Peer reviewedYes
NPARC number21269942
Export citationExport as RIS
Report a correctionReport a correction
Record identifiere20de9b8-5dfb-4cc7-b6df-e3ab2ecc4926
Record created2013-12-13
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)