Characterizations of Temperature-Dependent Tensile Deformation and Fracture Features of Commercially Pure Titanium

Abstract

Tensile deformation and fracture behavior of a commercially pure (CP) titanium were investigated at different temperatures through mechanical tests, microstructural observations and fractal analyses. It was found that, with increasing temperature, the number and size of microvoids formed along shear bands (SBs) or at the intersections of SBs on the deformed specimen surface increase, and the fractal dimensions of the scanning profile at the surface near fracture increase correspondingly, and the ones measured perpendicular to the tensile direction is obviously larger than those parallel to the tensile direction, indicating an increased concentration of plastic deformation of CP Ti along the tensile axis. The diameter and depth of dimples on the fracture surfaces of CP Ti increase significantly with increasing temperature, giving rise to a higher fracture surface roughness reflected by a higher fractal dimension. TEM observations demonstrated that the plastic deformation of CP Ti is gradually occupied by dislocation slipping rather than twinning with increasing temperature. This is in good agreement with the fractal analyses of the deformation and fracture features.

Coupled Influence of Temperature and Strain Rate on Tensile Deformation Characteristics of Hot-Extruded AZ31 Magnesium Alloy

“…6c, 7d and 10a, namely, dense SBs are formed and the density of twins dramatically decreases. Such a phenomenon was also found in uniaxially tensioned CP Ti, for which the number of deformation twins reduces with increasing T [27]. The dramatic decrease in twin density weakens the interactions between twins and dislocations and thus leads to an obvious decrease in flow stress and weakens strain hardening ability.…”

Effect of interfacial compounds on mechanical properties of titanium–steel vacuum roll-cladding plates

“…The results showed that the diffusion distance of Fe increases with the increase of heat treatment temperature. Ha and Hong [21] studied the deformation and fracture of titanium–stainless steel at different temperatures. Hai-tao et al [22] studied the effect of heat treatment on the microstructure and mechanical properties of titanium–steel explosive-rolling clad plates, which indicated that the diffusion of elements was increased with the increase of heat treatment temperature, and the TiC layer almost disappeared at 950°C.…”

The Determining Role of Nb Interlayer on Interfacial Microstructure and Mechanical Properties of Ti/Steel Clad Plate by Vacuum Rolling Cladding

“…The Ti/steel clad plate addresses this aspect. It not only ensures the perfect corrosion-resistance of Ti, but also provides excellent mechanical properties of ordinary steel plate, improves the service life of the equipment, and greatly reduces the production cost [ 1 , 2 , 3 , 4 , 5 , 6 ]. A few studies in this regard have been carried out on the manufacturing Ti/steel clad plate [ 7 , 8 , 9 ].…”