Comparative Study, in Pure Titanium Sheet, of the Microstructural Evolution Induced by Incremental Forming Process and Plane Strain Tensile Tests

Yannick Balcaen 1 Vanessa Vidal 2 Vincent Velay 2 Laurent Robert 2 Philippe Lours 2 Florence Pettinari-Sturmel 3 Joël Douin 3
1 LGP - Laboratoire Génie de Production
2 ICA - Institut Clément Ader
3 CEMES - Centre d'élaboration de matériaux et d'études structurales
Abstract : This paper deals with the plastic deformation mechanisms and the microstructural evolution of pure titanium sheets during Single Point Incremental Forming process (SPIF). Microstructural evolutions induced by SPIF are compared with those induced by monotonic plane strain stretching obtained by tensile tests. For monotonic straining, deformation mechanisms observed are mainly dislocation glide generally prismatic < a > and pyramidal < a > and < c+a >. whereas in SPIF straining, dislocation gliding and deformation twinning coexist. Slip systems involved in SPIF process are prismatic < a >, basal < a >, and first order pyramidal < a > and < c+a >. The twinning mode \11-22\ < 11-2-3 > was observed. This particular deformation mechanism could be explained by high strain rates and through-thickness compressive stress occuring during forming. It implies that models of plasticity developed thanks to conventional or heterogeneous tensile tests cannot provide a good description of the material behavior during this forming process.
Keywords : Plastic deformation Dislocation structure Pure Titanium Microscopy techniques Single Point Incremental Forming (SPIF)
Document type :
Conference papers
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https://hal.archives-ouvertes.fr/hal-01703240
Contributor : Imt Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Submitted on : Wednesday, February 7, 2018 - 4:05:07 PM
Last modification on : Wednesday, December 4, 2019 - 3:02:02 PM

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  • HAL Id : hal-01703240, version 1

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ICA-ALBI | MINES-ALBI | CNRS | CEMES | INSA-TOULOUSE | PPM | ICA | INSA-GROUPE | UNIV-TLSE3 | INC-CNRS

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Yannick Balcaen, Vanessa Vidal, Vincent Velay, Laurent Robert, Philippe Lours, et al.. Comparative Study, in Pure Titanium Sheet, of the Microstructural Evolution Induced by Incremental Forming Process and Plane Strain Tensile Tests. Ti 2011 - 12th World conference on titanium, Jun 2011, Beijing, China. pp.1148-1151. ⟨hal-01703240⟩

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