Effect of boron on microstructure and mechanical properties of multicomponent titanium alloys

被引：23

作者：

Okulov, I. V. ^{[1
,2
]}

Sarmanova, My. ^{[3
]}

Volegov, A. S. ^{[1
,4
]}

Okulov, A. ^{[5
]}

Kuehn, U. ^{[1
]}

Skrotzki, W. ^{[6
]}

Eckert, J. ^{[1
,2
]}

机构：

[1] IFW Dresden, Inst Komplexe Mat, D-01069 Dresden, Germany

[2] Tech Univ Dresden, Inst Werkstoffwissenschaft, D-01062 Dresden, Germany

[3] Leibniz Inst Oberflachenmodifizierung, D-04318 Leipzig, Germany

[4] Ural Fed Univ, Inst Nat Sci, Ekaterinburg 620000, Russia

[5] Russian Acad Sci, Inst Met Phys, Ural Div, Ekaterinburg 620219, Russia

[6] Tech Univ Dresden, Inst Strukturphys, D-01062 Dresden, Germany

来源：

MATERIALS LETTERS | 2015年 / 158卷

关键词：

Titanium alloys; Microstructure; Boron refinement; Electron microscopy; Mechanical properties; GRAIN-REFINEMENT; COMPOSITE;

D O I：

10.1016/j.matlet.2015.06.017

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Boron refinement is an established method to refine the grain structure of titanium alloys. The effect of boron on microstructure of multicomponent Ti-Nb-Cu-Co-Al-B alloys was studied. These as-cast alloys exhibit a composite-like microstructure consisting of about 92 vol% of beta-Ti dendrites surrounded by an ultrafine-structured eutectic composed of beta-Ti and B2 TiCo. It was found that significant additions (up to 1 at%) of boron do not result in a pronounced refinement of microstructure in these alloys. However, noticeable strengthening and stiffening effects are observed for the alloys with increasing boron concentration. In particular, the yield strength of Ti-13.6Nb-6Co-5.1Cu-6.5Al (at%) improves from 1110 +/- 30 MPa to 1200 +/- 30 MPa with addition of 1 at% of boron. Additionally, increasing boron content affects the morphology of the eutectic structure causing its degradation. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：111 / 114

页数：4

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