Microstructure and mechanical properties of a rapid solidified boron- modified duplex stainless steel

Abstract

Two duplex stainless steels 2205 and 2205 with 2.5 wt-% B addition prepared by a fast solidification technique were investigated. The samples were arc melted and cast in a cylindrical mould with varying diameters in a single cavity that provided different cooling rates. The hardness increased in both cases for smaller diameters, however, there was a different profile from the surface to the centre in case of 2205 with 2.5 wt-% B. The microstructural investigation indicated that boron addition led to the formation of hard borides and grain refinement. Different boride morphologies that varied with the cooling rates were identified. The compression strength at room temperature improved by a factor of 3.5 with boron addition without considerably decreasing the ductility.

Review and Perspectives of Electrochemical Energy Conversion and Storage in Metal Diborides and XBenes

“…The solid-state reaction method is a fundamental approach for synthesizing AlB 2 -type metal diborides. 84 In this process, the chosen metal precursors, which can be in the form of metal powders or metal oxides, are combined with boron sources, typically boron powder. This mixture is subjected to high temperatures, typically ranging between 1200 °C and 2000 °C, within a controlled environment.…”

“…These techniques allow for precise control over material properties, microstructure, and phase composition, offering tailored metal diborides for specific applications. The solid-state reaction method is a fundamental approach for synthesizing AlB 2 -type metal diborides . In this process, the chosen metal precursors, which can be in the form of metal powders or metal oxides, are combined with boron sources, typically boron powder.…”