/pdf/representative-volume-element-in-2d-for-disks-and-in-3d-for-x49nskk6no.pdf

Representative volume element in 2D for disks and in 3D for balls

/pdf/consolidation-of-aisi316l-austenitic-steel-tib2-composites-37dkob2aoq.pdf

Consolidation of AISI316L Austenitic Steel — TiB2 Composites by SPS and HP-HT Technology

Titanium diboride has many advantages such as a high melting point, high Young’s modulus, low density, good thermal conductivity and high Vickers hardness. Therefore, the addition of TiB2 to metal matrices has also been observed to greatly increase stiffness, hardness and wear resistance. The aim of the studies was to determine the influence of different contents of TiB2 ceramics on selected properties of AISI 316L austenitic stainless steel. Metal matrix composites containing TiB2 as a particulate phase were produced by high pressure-high temperature (HP-HT) sintering. Next, the apparent density (ρo) was measured using the hydrostatic method. The hardness was determined by the Vickers method. Young’s modulus measurements of the sintered composites were also taken using the ultrasonic method of measuring the transition speed of transverse and longitudinal waves. This paper also presents the microstructure analysis of composites with different contents of TiB2 particles. The composite was analyzed by observations with an optical microscope, scanning electron microscope (SEM) and energy dispersive spectrometry (EDS). It was shown that the properties of the composites significantly depend on the sintering conditions. Generally, the application of a larger participation of strengthening phase improves the properties of the sintered composite materials. The microstructure of the composites with different contents of TiB2 consisted of a fine and uniform TiB2 particle distribution along the grain boundaries.

Austenitic stainless steel- TiB2 composites obtained by HP-HT method

Hard turning of martensitic AISI 440B stainless steel

In this paper, a manufacturing method of the graded Ti3SiC2-diamond composite is presented. The material contained a gradients of phase concentration distribution, formed by a centrifugal densifi cation process. The FGM material was obtained due to a difference in sedimentation velocity of the particles which differ in size. Hardness measurements were carried out from a top to bottom surface of the sample. Phase distribution was modelled and compared with the results of hardness measurement. The materials with the continuous change of phases distribution allowed to the delamination, which appeared frequently in commercial two-layer PCD composites, to be reduced.

L Jaworska

Papers

Gradientowa mikrostruktura kompozytowych spieków diamentowych przeznaczonych na narzędzia skrawające

of Achievements in Materials and Manufacturing Engineering of Achievements in Materials and Manufacturing Engineering

Gradient microstructure of PCD composites assigned for cutting tools