Effect of Boron Sinter-Aid on the Microstructure and Properties of Austenitic Stainless Steel- TIB2 Composites / Wpływ Dodatku Boru Na Mikrostrukturę I W Łaściwosci Kompozytów Stal Austenityczna-TIB2

Abstract

In the work, the effect the boron addition on the microstructure and properties of the composites with austenitic steel of matrix was investigated. The composites were consolidated using the high pressure-high temperature (HP-HT) method. Two composite types were fabricated, i.e. steel with 8 vol.% TiB2 and steel with 8 vol.% TiB2 and 1 vol.% boron. Density of sintered materials was measured according to the Archimedes principle. Mechanical properties were determined by Vickers microhardness and compression test. The wear resistance was investigeted using ball-on-disc method. The microstructure of composites was analyzed using a scanning electron microscope. The results show that the boron addition and sintering parameters have influence on the mechanical and tribological properties of the composites. Materials are characterized by very high density. The composites with boron exhibited higher Young’s modulus and microhardness in comparison with the properties of composites without boron addition.

Effects of Porosity and Boron Reinforcement in AISI 316L Stainless Steel for Biomedical Applications

“…The images show that the metallurgy bonding is not fully realized in the sample structures. The literature indicates that adding boron increases the structure's density and enhances sintering [20], [26][27][28]. In the present study, although better bonding in the microstructure was expected with increasing boron addition, the desired result was not achieved.…”

“…006, 31.32, 25.28 HB. 39.5, 34.5,26.2 MPa strengths were measured for 20%, 30% and 40% porous samples respectively.…”

An Efficient Approach for Nitrogen Diffusion and Surface Nitriding of Boron-Titanium Modified Stainless Steel Alloy for Biomedical Applications

“…In this framework, adding boron and titanium in a stainless steel matrix has been introduced to enhance the corrosion resistance of the resulting stainless steel alloy, along with controlling the leaching of ions from the stainless steel matrix by optimizing the sintering parameters. The elemental boron can improve the sinter ability of the alloy system as it is an active sintering additive for stainless steel and increasing the overall densification process [27,28]. Boron also possesses a good tendency of forming borides with iron and nickel that can decrease the leaching of nickel ions from the stainless steel matrix [29].…”