Phase Composition and Microstructure of Ti-Nb Alloy Produced by Selective Laser Melting

International Seminar on Interdisciplinary Problems in Additive Technologies

材料科学;物理学

Sharkeev, Yu.P.^1,2 ; Eroshenko, A.Yu.^1 ; Kovalevskaya, Zh.G.^1,2 ; Saprykin, A.A.^1,3 ; Ibragimov, E.A.^1,3 ; Glukhov, I.A.^1 ; Chimich, M.A.^1 ; Uvarkin, P.V.^1 ; Babakova, E.V.^3

Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences, 2/4, pr. Akademicheskii, Tomsk

634021, Russia^1

Tomsk Polytechnic University, 30, Lenina avenue, Tomsk

634050, Russia^2

Yurga Technical Institute, Tomsk Polytechnic University, 26, Leningradskaya Avenue, Yurga

652055, Russia^3

关键词: Beta phase grains;    Element compositions;    Fine grained;    Niobium content;    Niobium powder;    Non equilibrium;    Phase grains;    Selective laser melting;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/140/1/012020/pdf
DOI  :  10.1088/1757-899X/140/1/012020

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The phase composition and microstructure of Ti-Nb alloy produced from composite titanium and niobium powder by selective laser melting (SLM) was studied. Produced monolayered Ti-Nb alloy enhanced the formation of fine-grained and medium-grained zones with homogeneous element composition of 36-38% Nb mass interval. Alloy phase composition responded to β-alloy substrate phase (grain size was 5-7 pm) and non-equilibrium martensite α''- phase (grain size was 0.1-0.7 μm). α''-phase grains were found along β-phase grain boundaries and inside grains, including decreased niobium content. Alloy microhardness varied within 4200-5500 MPa.