Dynamic tensile behavior of electron beam additive manufactured Ti6Al4V

作者：Rodriguez O L; Allison P G^*; Whittington W R; Francis D K; Rivera O G; Chou K; Gong X; Butler T M; Burroughs J F

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2015, 641: 323-327.

DOI：10.1016/j.msea.2015.06.069

• Electron microscopy
• Powder metallurgy
• Plasticity
• Strain measurement
• Titanium alloys

High rate and quasi-static tensile experiments examined strain rate dependence on flow stress and strain hardening of additive manufactured Ti6Al4V. Variations on strain-hardening coefficient indicate that the rate of thermal softening is greater than strain hardening during plastic deformation. Strain rate sensitivity calculations within the plastic strain regime suggest changes in deformation mechanisms. Fractography revealed cup-and-cone fracture for quasi-static samples and shear mechanisms for high rate samples. As-deposited microstructure consisted of bimodal alpha+beta with the presence of secondary martensitic phase.

• 出版日期2015-8-12