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A micro-level strain analysis of a high-strength dual-phase steel

  • Marianne Kapp , Thomas Hebesberger und Otmar Kolednik
Veröffentlicht/Copyright: 11. Juni 2013
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International Journal of Materials Research
Aus der Zeitschrift International Journal of Materials Research Band 102 Heft 6

Abstract

The deformation behaviour of a dual-phase steel with a tensile strength of about 1 000 MPa is investigated at the micro level. In-plane strains are determined by means of in-situ tensile tests in the scanning electron microscope and automatic local deformation analysis (based on digital image correlation). Maps of strain at high and low magnification reveal the network-like formation of deformation bands. In detailed high resolution analyses the sites of highest strain (“hot spots”) are identified. Observations in metallographic cross-sections indicate that these hot spots are frequently the origin of damage initiation.

Keywords: Dual-phase steel; Digital image correlation; Local strain analysis; Damage
* Correspondence address, Ms. Marianne Kapp Jahnstraße 12, 8700 Leoben, Austria Tel.: +43 3842 804 309 Fax: +43 3842 804 116 E-mail:

Dedicated to Prof. F. D. Fischer on the occasion of his 70thbirthday

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Received: 2010-12-23
Accepted: 2011-4-6
Published Online: 2013-06-11
Published in Print: 2011-06-01

© 2011, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110522
Schlagwörter für diesen Artikel
Dual-phase steel; Digital image correlation; Local strain analysis; Damage

Artikel in diesem Heft

  1. Original Contributions
  2. Microstructure and adhesion of as-deposited and annealed Cu/Ti films on polyimide
  3. On the origin of inhomogeneous stress and strain distributions in single-crystalline metallic nanoparticles
  4. Contents
  5. Contents
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  8. IJMR's most downloaded papers
  9. Original Contributions
  10. An excursion into the design space of biomimetic architectured biphasic actuators
  11. Strategies for fracture toughness, strength and reliability optimisation of ceramic-ceramic laminates
  12. Fracture statistics of brittle materials at micro- and nano-scales
  13. Martensitic phase transformations of nanocrystalline NiTi shape memory alloys processed by repeated cold rolling
  14. Variational modeling of shape memory alloys – an overview
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  16. Modelling of diffusive and massive phase transformations in binary systems – thick interface parametric model
  17. On the strength of grain and phase boundaries in ferritic-martensitic dual-phase steels
  18. A micro-level strain analysis of a high-strength dual-phase steel
  19. Thermodynamic description of niobium-rich γ-TiAl alloys
  20. Phase transition and ordering behavior of ternary Ti–Al–Mo alloys using in-situ neutron diffraction
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