Boride precipitation and mechanical behaviour of high boron stainless steel with boron and titanium additions
Document Type
Journal Article
Publisher
Inderscience Publishers
School
School of Engineering
RAS ID
19739
Abstract
High boron stainless steel (HBSS) was produced by vacuum induction melting (VIM) technique. The effects of boron and titanium on the microstructure and mechanical properties of the HBSS were investigated. The results show that the boron can be formed into Fe1.1Cr0.9B0.9 boride particulates which lead to poor mechanical properties, especially the ductility, of the as-cast HBSS. With the boron content of the as-cast HBSS increased from 0.4 wt. % to 1.4 wt. %, the elongations to rupture (Er) and the impact toughness decrease from 7.8% and 11.45 J/cm2 to 2.3% and 4.21 J/cm2, respectively. The formation of TiB2, which replaces most of the prior Fe1.1Cr0.9B0.9 boride particulates, benefits the refinement of the microstructures and the improvement of the mechanical properties. The impact toughness of the as-rolled and then heat treated HBSS, what's more, has tremendous increase from 28.1 J/cm2 to 42.6 J/cm2.
DOI
10.1504/IJMPT.2015.072559
Access Rights
subscription content
Comments
Xiao-Qiu Zheng, Ying Liu, Jun Li, Lin He, Lai-Chang Zhang. "Boride precipitation and mechanical behaviour of high boron stainless steel with boron and titanium additions" International Journal of Materials and Product Technology(IJMPT), 51(4), 2015. 10.1504/IJMPT.2015.072559. Available here.