Abstract
Plastic anisotropy is an important issue for metals possessing a hexagonal close-packed structure. This study investigated the anisotropic deformation characteristics of commercially pure titanium with basal texture. A quasi-static uniaxial compression gave rise to clear differences in flow curves and strain-hardening rates depending on the loading direction. This study employed a constitutive approach to quantify the contribution of (i) dynamic Hall–Petch strengthening, (ii) dislocation pile-up, and (iii) texture hardening with respect to the total flow stress. Such an approach calculated a flow stress comparable to the measured value, providing logical validity. The microstructural and mechanical differences depending on the loading direction (i.e., anisotropy) were successfully interpreted based on this approach.
Highlights
Titanium and its alloys are used in many commercial applications in the aerospace, biomedical, sporting goods, and sea water plant industries [1,2,3]
A conventional rolling process gives rise to a strong split basal texture in commercially pure titanium (CP-Ti), where (i) {0002} basal planes are aligned with the rolling direction (RD) and (ii) the basal axis is tilted from the normal direction (ND) to the transverse direction (TD) in the cross-section [6]
This study aims to clarify the role of anisotropy in microstructural evolution and the compressive properties of anisotropy rolled CP-Ti
Summary
Titanium and its alloys are used in many commercial applications in the aerospace, biomedical, sporting goods, and sea water plant industries [1,2,3]. Commercially pure titanium (CP-Ti) has been used in the applications of heat exchangers or pressure vessels due to its remarkable corrosive resistance and cold formability. A conventional rolling process gives rise to a strong split basal texture in CP-Ti, where (i) {0002} basal planes are aligned with the rolling direction (RD) and (ii) the basal axis is tilted from the normal direction (ND) to the transverse direction (TD) in the cross-section [6]. Such a preferential texture development resulted in plastic anisotropy, as mentioned above
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