Charpy Impact Behavior of a Novel Stainless Steel Powder Wire Mesh Composite Porous Plate

Abstract

A novel powder wire mesh composite porous plate (PWMCPP) was fabricated with 304 stainless steel powders and wire mesh as raw materials by vacuum solid-state sintering process using self-developed composite rolling mill of powder and wire mesh. The effects of different mesh volume fractions, mesh diameters, and sintering temperatures on the pore structure and Charpy impact properties of PWMCPPs were studied. The results show that PWMCPPs have different shapes and sizes of micropores. Impact toughness of PWMCPPs decreases with increasing wire mesh volume fraction, and increases first and then decreases with increasing wire mesh diameter, and increases with increasing sintering temperature. Among them, the sintering temperature has the most obvious effect on the impact toughness of PWMCPPs, when the sintering temperature increased from 1160 °C to 1360 °C, the impact toughness increased from 39.54 J/cm2 to 72.95 J/cm2, with an increased ratio of 84.5%. The tearing between layers, the fracture of the metallurgical junction, and the fracture of wire mesh are the main mechanisms of impact fractures of the novel PWMCPPs.

Production and Tensile Behavior of Novel Powder Wire Mesh Composite Porous Plates

“…Our previous work [ 34 ] demonstrated that the PWMCPP has good impact toughness. Therefore, it is very important to test the uniaxial tensile properties of PWMCPPs to fully research the mechanical properties.…”

Biomechanical and physical properties selection of Ti-Ha-CaCO₃ biocomposite prostheses for replacement of bone atrophy

“…The load and deformation readings were automatically recorded until the sample ruptured. The specimen's total surface area, compressive strength and modulus were calculated using a formula adopted by Li and Zhou (2021) (2)…”

“…The impact test was carried out using a Charpy impact testing machine with a capacity of 150J/300J and 2 Joules of minimum value of scale graduation (Avery-Denison, model No: 6705U/33122, Leeds, LS102DE England). The specimens were then subjected to a machining process according to the ASTM E23 testing procedure, with a specimen size of 55 X 10 X 10 mm with a notch angle of 45, 2 mm depth and 0.25 mm radius along the base, as shown in Figure 1 (Li and Zhou 2021). The impact strength values were considered the initiation fracture toughness (IS), and the plane strain fracture toughness (FT) was calculated from the expression in Eqn.…”

Preparation, Microstructure and Impact Properties of a Novel Stainless Steel Porous Plate

“…In our previous work 49,50) we reported on manufacturing porous strip by horizontal rolling process that required wire mesh aperture to be smaller than powder size , thus powder could not fall out of mesh due to gravity, and porous strip was composed of powder-wire mesh structure. Differently, vertical rolling process was used in this work, particle size was smaller than wire mesh aperture so that powder could be pen-etrated into the other side of wire mesh by extrusion pressure, then the unique characteristic of powder-wire mesh-powder sandwich structure was obtained for improving the proportion of powder.…”