Structural Features and Properties of Alloy 84% WC ― 16% Co,Obtained by Hot Pressing in the Solid and Liquid Phases. Part 1. Effect of the Temperature at which the Specimens are Prepared on Their Density and Structure

Studies are made of changes in the porosity and structure of a hard alloy obtained by hot pressing and sintering within a broad range of temperatures (950-1450°C). The effect of solid- and liquid-phase annealing on their porosity and structure is also examined. It is shown that the hot-pressed specimens are denser than the sintered specimens within the solid-phase region, other conditions being equal. Solid-phase annealing of hot-pressed and sintered specimens increases the density of both types of specimens, but the annealing operation is more effective in the former case. It is established that the open pore channels are 2-3 times smaller in the hot-pressed specimens than in the sintered specimens and are no larger than the average size of the tungsten carbide particles. Active growth of the carbide particles and redistribution of the ductile phase are observed even in the solid phase. The carbide particles grow considerably faster (by a factor of four) at sintering temperatures above 1200°C.     

Model of Quasi-Isostatic Hot Pressing of SHS Products in the System Titanium ― Carbon ― Nickel. Part 2. Results of Modelling and Experimental Studies

Results are provided for modelling and experimental studies of hot quasi-isostatic pressing of SHS products of the system Ti C Ni. Good conformity is demonstrated between experimental data and calculated results using a rheological model for nonlinearly-viscous synthesis products. The model considers presence of a melt and the local nature of solid phase particle flow. Quantitative estimates are obtained for compaction of different zones of the loose shell, the force characteristics of the process, and the nonisostatic coefficient. This information is of interest for production planning and optimization of SHS product compaction.     

Influence of Manufacturing Regimes on Structural Features and Mechanical Properties of High-Strength Pseudo Β-Titanium Alloy Rolled Workpieces

Metallurgist - The influence of production parameters for deformation and various regimes for manufacturing rolled workpieces 5 and 12 mm thick of pseudo-β-titanium alloy VT47 in a thermally...     

Effect of Processing Parameters on the Structure and Properties of Powder Fe–Al Intermetallic Compounds Obtained by Sintering and Impulse Hot Pressing

Powder Metallurgy and Metal Ceramics - The paper examines the effect of high-energy grinding and post-treatment conditions on the structure and physical and mechanical properties of iron aluminide...     

Effect of Vacuum Hot Pressing Temperature on the Mechanical and Tribological Properties of the Fe–Cu–Ni–Sn–VN Composites

Powder Metallurgy and Metal Ceramics - The mechanical (hardness and elastic modulus) and tribological (friction force and wear rate) properties of the Fe–Cu–Ni–Sn–VN...     

Effect of Annealing Temperature and Time on Martensitic Transformation Temperatures and Mechanical Properties of the Ti–50.7 at % Ni Shape Memory Alloy

Russian Journal of Non-Ferrous Metals - The influence of temperature and time of recrystallization annealing on the characteristic temperatures of martensitic transformation and mechanical...     

The Influence of Deformation Modes on the Structure and Properties of Al–Mg–X Powder Composites. III. The Influence of Nanosized SiC Powder Content and Deformation Processing on the Properties of AMg5 Alloy Powder Composites

Powder Metallurgy and Metal Ceramics - The structure and mechanical properties of a powder composite with an AMg5 alloy metallic matrix reinforced with SiC particles have been examined. The...