In situ neutron measurements and modelling of the intergranular strains in the near-β titanium alloy Ti-β21S

Viwanou Hounkpati; Sylvain Fréour; David Gloaguen; Vincent Legrand; Joe Kelleher; Winfried Kockelmann; Saurabh Kabra

doi:10.1016/j.actamat.2016.02.065

In situ neutron measurements and modelling of the intergranular strains in the near-β titanium alloy Ti-β21S

Viwanou Hounkpati
, Sylvain Fréour
, David Gloaguen
, Vincent Legrand
, Joe Kelleher
, Winfried Kockelmann
, Saurabh Kabra

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

The intergranular lattice strains in the near-β titanium alloy Ti-β21S have been measured in the longitudinal and transverse directions during tensile loading using neutron diffraction. The obtained results have been modelled and explained using a two-phase elasto-plastic self-consistent model. We first identified the best set of the main model parameters (single crystal elastic constants, critical resolved shear stresses) and investigated the influence of these parameters on the behaviour of both the polycrystal and the diffracting volume. Good agreement between the experimental results and those predicted by the model was found for the macroscopic stress-strain dependencies and lattice strain developments of Ti-β21S.

Original language	English
Pages (from-to)	341-352
Number of pages	12
Journal	Acta Materialia
Volume	109
DOIs	https://doi.org/10.1016/j.actamat.2016.02.065
State	Published - May 1 2016
Externally published	Yes

Keywords

EPSC model
Lattice strains
Neutron diffraction
Plasticity
Titanium alloy

Access to Document

10.1016/j.actamat.2016.02.065

Cite this

@article{21fa7729661c49a48292372e86006db4,

title = "In situ neutron measurements and modelling of the intergranular strains in the near-β titanium alloy Ti-β21S",

abstract = "The intergranular lattice strains in the near-β titanium alloy Ti-β21S have been measured in the longitudinal and transverse directions during tensile loading using neutron diffraction. The obtained results have been modelled and explained using a two-phase elasto-plastic self-consistent model. We first identified the best set of the main model parameters (single crystal elastic constants, critical resolved shear stresses) and investigated the influence of these parameters on the behaviour of both the polycrystal and the diffracting volume. Good agreement between the experimental results and those predicted by the model was found for the macroscopic stress-strain dependencies and lattice strain developments of Ti-β21S.",

keywords = "EPSC model, Lattice strains, Neutron diffraction, Plasticity, Titanium alloy",

author = "Viwanou Hounkpati and Sylvain Fr{\'e}our and David Gloaguen and Vincent Legrand and Joe Kelleher and Winfried Kockelmann and Saurabh Kabra",

year = "2016",

month = may,

day = "1",

doi = "10.1016/j.actamat.2016.02.065",

language = "English",

volume = "109",

pages = "341--352",

journal = "Acta Materialia",

issn = "1359-6454",

publisher = "Elsevier",

}

TY - JOUR

T1 - In situ neutron measurements and modelling of the intergranular strains in the near-β titanium alloy Ti-β21S

AU - Hounkpati, Viwanou

AU - Fréour, Sylvain

AU - Gloaguen, David

AU - Legrand, Vincent

AU - Kelleher, Joe

AU - Kockelmann, Winfried

AU - Kabra, Saurabh

PY - 2016/5/1

Y1 - 2016/5/1

N2 - The intergranular lattice strains in the near-β titanium alloy Ti-β21S have been measured in the longitudinal and transverse directions during tensile loading using neutron diffraction. The obtained results have been modelled and explained using a two-phase elasto-plastic self-consistent model. We first identified the best set of the main model parameters (single crystal elastic constants, critical resolved shear stresses) and investigated the influence of these parameters on the behaviour of both the polycrystal and the diffracting volume. Good agreement between the experimental results and those predicted by the model was found for the macroscopic stress-strain dependencies and lattice strain developments of Ti-β21S.

AB - The intergranular lattice strains in the near-β titanium alloy Ti-β21S have been measured in the longitudinal and transverse directions during tensile loading using neutron diffraction. The obtained results have been modelled and explained using a two-phase elasto-plastic self-consistent model. We first identified the best set of the main model parameters (single crystal elastic constants, critical resolved shear stresses) and investigated the influence of these parameters on the behaviour of both the polycrystal and the diffracting volume. Good agreement between the experimental results and those predicted by the model was found for the macroscopic stress-strain dependencies and lattice strain developments of Ti-β21S.

KW - EPSC model

KW - Lattice strains

KW - Neutron diffraction

KW - Plasticity

KW - Titanium alloy

UR - https://www.scopus.com/pages/publications/84960326353

U2 - 10.1016/j.actamat.2016.02.065

DO - 10.1016/j.actamat.2016.02.065

M3 - Article

AN - SCOPUS:84960326353

SN - 1359-6454

VL - 109

SP - 341

EP - 352

JO - Acta Materialia

JF - Acta Materialia

ER -

In situ neutron measurements and modelling of the intergranular strains in the near-β titanium alloy Ti-β21S

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this