Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Study on fracture in heat affected zones in the vicinity of spot welds in a steel with tailored material properties
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0002-5099-6462
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0001-7074-8960
2015 (English)In: Hot Sheet Metal Forming of High-Performance Steel 5th International Conference: May 31-June 3, Toronto, Canada : Proceedings / [ed] Kurt Steinhoff; Mats Oldenburg; Braham Prakash, Auerbach: Verlag Wissenschaftliche Scripten , 2015, p. 211-219Conference paper, Published paper (Refereed)
Abstract [en]

The demand for ultra-high strength steel (UHSS) increased in the last decade due to their favourable properties in the process of press hardening. Press hardening is a process where an austenitized blank of boron steel is formed and quenched in one production step to achieve superior mechanical properties compared to the blank in as-delivered condition. Driving force for the development of this technique is the automotive industry and regulations concerning passenger safety and fuel consumption. In this work fracture in spot welds and their proximity in low alloyed boron steel have been investigated using finite element simulation and digital speckle photography. This study is motivated by the use of spot welding as major joining method in automotive components. The investigation includes blanks with three different base microstructures, ferritic, bainitic and martensitic. These types of microstructures are commonly found in press hardened components with tailored material properties. All test samples are spot welded in a centred position with a coupon. The welding process introduces heat into the blank and affects the microstructure in the vicinity of the weld leading to varying mechanical properties. During tensile testing of the spot welded samples the mechanical response of the material has been recorded by digital speckle photography (DSP), extensometer and force measurement. The experimental method of DSP measurement allows to resolve displacement and strain fields in the specimen up until fracture. For finite element analysis the commercial available code LS-Dyna together with a user defined material model is used. The material model predicts the mechanical response of the bulk material, i.e. the composite, depending on the phase volume fractions of present phases.

Place, publisher, year, edition, pages
Auerbach: Verlag Wissenschaftliche Scripten , 2015. p. 211-219
Series
CHS2-Series ; 5
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-34791Local ID: 914766ba-db23-4b24-96a4-731eb8fd4194ISBN: 9783957350237 (print)OAI: oai:DiVA.org:ltu-34791DiVA, id: diva2:1008042
Conference
International Conference on Hot Sheet Metal Forming of High-Performance Steel : 31/05/2015 - 03/06/2015
Note
Validerad; 2016; Nivå 1; 20151113 (stegol)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

http://www.chs2.eu/fileadmin/bilder_chs2/pdf/Table_of_Contents_Proceedings_2015.pdf

Authority records BETA

Golling, StefanÖstlund, RickardOldenburg, Mats

Search in DiVA

By author/editor
Golling, StefanÖstlund, RickardOldenburg, Mats
By organisation
Mechanics of Solid Materials
Applied Mechanics

Search outside of DiVA

GoogleGoogle Scholar

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 89 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf