Lattice strain development in an alpha titanium alloy studied using synchrotron and neutron diffraction

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:819

Article

Agbovi, Kodjo Emmanuel¹  Girault, Baptiste¹  Fajoui, Jamal¹  Kabra, Saurabh²  Kockelmann, Winfried²  Buslaps, Thomas³  Poulain, Agnieszka³  Gloaguen, David¹ 

[1] Univ Nantes, Res Inst Civil & Mech Engn GeM UMR CNRS 6183, 58 Rue Michel Ange BP 420, F-44606 St Nazaire, France

[2] Sci & Technol Facil Council, Rutherford Appleton Lab, ISIS Neutron & Muon Source, Harwell OX11 0QX, Berks, England

[3] European Synchrotron Radiat Facil, 71 Ave Martyrs,CS 40220, F-38043 Grenoble 9, France

关键词: Titanium alloys;    Strain measurements;    Plasticity;    Modelling;    Anisotropy;    Diffraction;   

DOI  :  10.1016/j.msea.2021.141489

来源: Elsevier

【 摘 要 】

Neutron and high-energy X-ray diffraction methods have been used to investigate deformation mechanisms (slip and twinning activities) during uniaxial tensile tests of Grade 1 commercially pure titanium (Ti-alpha). These two diffraction techniques have provided valuable and complementary information. The predictions made by an Elasto-Plastic Self-Consistent (EPSC) model, taking into account grain reorientation and stress relaxation induced by twinning activity, have been compared with the experimental data. Results clearly demonstrate that there is a good agreement between simulations and diffraction measurements. The EPSC model enables accurate predictions of: (i) the lattice strains developed in variously oriented {hk.l} grain families within the bulk material, (ii) the grain reorientation induced by twinning activity and (iii) the macroscopic stress-strain response. Two different textured products were studied in order to evaluate the influence of texture on the mesoscopic and macroscopic responses of Ti-alpha alloy.

【 授权许可】

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