Room-temperature tensile properties of float-zone processed β-stabilized γ-TiAl(Nb,Cr,Zr) intermetallic

被引：26

作者：

Kartavykh, A. V. ^{[1
]}

Asnis, E. A. ^{[2
]}

Piskun, N. V. ^{[2
]}

Statkevich, I. I. ^{[2
]}

Gorshenkov, M. V. ^{[1
]}

Korotitskiy, A. V. ^{[1
]}

机构：

[1] Natl Univ Sci & Technol MISIS, Leninsky Pr 4, Moscow 119991, Russia

[2] EO Paton Elect Welding Inst, 11 Bozhenko Str, UA-03680 Kiev, Ukraine

来源：

MATERIALS LETTERS | 2017年 / 188卷

关键词：

Intermetallic alloys and compounds; Structural; Microstructure; Deformation and fracture; ELECTROMAGNETIC CONFINEMENT; DIRECTIONAL SOLIDIFICATION; MECHANICAL-PROPERTIES; TIAL ALLOY; MICROSTRUCTURE; DESIGN;

D O I：

10.1016/j.matlet.2016.10.103

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We extend the study of Ti-44Al-5Nb-3Cr-1.5Zr (at%) beta-stabilized intermetallic processed by high-gradient (300 degrees C cm(-1)) induction float zone (FZ) technique that reported in Mater. Lett.162 (2016)180. The alloy ingots possess unique phase microstructure consisting of (gamma+alpha(2)) submicron-scaled strictly oriented lamellar matrix with incorporated minor y-granular fraction, and the least intergranular quota of beta(Ti)/B2 phase. The tensile tests of axially-oriented bars have shown high average yield strength (YS) value of 837 MPa and ultimate strength (UTS) of 983 MPa along with the rupture elongation of 1.45%. Judging by these values, FZ-processing could be proposed as the efficient alternative to complex multistage thermal treatments or HIPing of cast beta-stabilized intermetallics. Advanced room-temperature (RT) tensile deformability of alloy with specific microstructure and composition is explained by the softening of chromium-alloyed B2 intergranular fraction due to mutually exclusive redistribution of Cr and Zr between the conjugate gamma and B2 phases.

引用

页码：88 / 91

页数：4

共 13 条

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