The microstructural evolution of twinning-induced plasticity steel during high-pressure torsion (HPT) processing at 573 K was systematically evaluated. Due to the high processing temperature, the formation of a homogeneous nanostructure was primarily dominated by complicated dislocation and grain boundary activities in lieu of deformation twinning. Apart from the grain refinement process, phase...

The influence of alloying additions on strengthening of high pressure torsion (HPT) processed alloys was investigated using commercially pure Al (Al-1050 alloy) and five Al-(1-3)Mg-(0-4)Cu alloys (in wt%). Microhardness was measured on cross sections. For Al-1050 the microhardness reaches a peak at an effective strain of about 3 and subsequently decreases. The microhardness of Al-Mg-Cu alloys i...

Processing magnesium alloy by High-Pressure Torsion (HPT) is a technique used successfully to refine the grains of an submicrometer and nanometer scale produce ultrafine grained microstructure. Grain refinement can improve mechanical properties alloys as well enhancing its ductility providing potential for exhibiting superplastic behaviour at elevated temperature. Research was conducted process...

The microstructure and mechanical properties of materials saturate to steady states after severe plastic deformation (SPD). Despite the well-known effect temperature on steady-state microstructure, there is no general agreement significance strain rate applicability Zener-Hollomon parameter in this regard. In study, several pure metals (aluminum, copper, titanium, iron) a Cu–30Zn (wt%) brass al...

Orthopedic and dental implants made of ?-type Ti alloys have low elastic modulus which can better relieve the stress shielding effects after surgical implantation. Nevertheless, clinical application is hampered by insufficient mechanical strength gradual release pro-inflammatory metallic ions under physiological conditions. In this study, Ti-45Nb alloy subjected to high-pressure torsion (HPT) p...

In this paper, the authors consider mechanisms of formation high-strength states in Zn–1%Li–2%Mg alloy as a result its processing by high pressure torsion (HPT) method. For first time, study showed that using HPT treatment, varying degree deformation at room temperature, it is possible to increase ultimate strength zinc from 155 383 MPa (with an yield stress 149 306 MPa) without losing ductilit...

Differential Scanning Calorimetry (DSC) is a thermal analysis technique that measures the energy absorbed or released by a sample as a function of temperature or time. Analysis by DSC has wide applications for examining solid-state reactions and solid-liquid reactions in many different materials. Quantitative analyses of the kinetics of reactions may be assessed by reviewing the interrelation b...