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Experimental and numerical investigation of the microstructural influence on the deformation behavior of notched cp-titanium specimens

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Published/Copyright: August 16, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 104 Issue 6

Abstract

Notches lead to a decrease in the strength of machine parts in comparison to unnotched structures. The strength reduction is caused by stress concentration at the notch base. In static or dynamic calculations this effect is considered by the notch stress concentration factor. In this paper, simulations with a titanium single-crystal were carried out to analyze the dependence of the notch-stress concentration factor on the orientation of the anisotropic single-crystal material. Furthermore, numerical simulations and experiments with notched commercially pure titanium specimens have been performed to compare the stress–strain relationships until the ultimate tensile stress. The strain rate and grain size have been varied to identify dependencies on the microstructural situation which may influence the strength during the tests. After the tests, interrupted at ultimate tensile stress, metallographic sections were taken to reveal possible changes in microstructure. In the present investigation it is shown that for the single-crystal the notch-stress concentration factor depends strongly on the crystal orientation. Evidence is found that the grain size affects the strength of a notched specimen negatively, when the grain size is of the same size as the notch radius.

Keywords: Microstructure; Simulation; Cp-titanium; Notch
* Correspondence address, Christoph Ruffing, TU Kaiserslautern, Gottlieb Daimler Straße, 67663 Kaiserslautern, Germany, Tel.: +49 (0)631 205 5075, E-mail:

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Received: 2012-5-3
Accepted: 2012-9-23
Published Online: 2013-08-16
Published in Print: 2013-06-13

© 2013, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110902
Keywords for this article
Microstructure; Simulation; Cp-titanium; Notch

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Analysis of V(C, N) nanoparticles in a medium carbon bainitic microalloyed steel and their influence on strengthening
  5. Experimental and numerical investigation of the microstructural influence on the deformation behavior of notched cp-titanium specimens
  6. Interfacial study of Si–Ge multilayers grown using ultrahigh-vacuum chemical vapor deposition
  7. Age-hardenability related to precipitation and lamellar-forming grain boundary reaction in dental low-carat gold alloy
  8. Calorimetric study and phase diagram investigation of the Au–Ga system
  9. Roles of iron and copper salts for controlling morphology of silver nanostructures
  10. Hydrothermal synthesis of nanowires, nanobelts, and nanotubes of vanadium oxides from one reaction system
  11. Facile synthesis of ultrafine TiO2 nanowires with large aspect ratio and its photoactivity
  12. Kinetics of thermal dehydration of sol-gel derived MgO–ZrO2 composite hydrogel
  13. Synthesis and reaction process of β-Si3N4 by means of carbothermal nitridation of serpentine
  14. Analysis of size effect and anisotropy of 6H – SiC thermal conductivity
  15. Effects of molecular polarity on nanofluidic behavior in a silicalite
  16. Vertical static compression performance of honeycomb paperboard
  17. Short Communications
  18. Synthesis of phase purity V2AlC via self-propagation high temperature sintering
  19. Densification and microwave properties of low-temperature co-fired CaO–B2O3–SiO2 glass-ceramic with La–B–Si additions
  20. DGM News
  21. DGM News
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