Effects of Ti Addition on the Mechanical Properties and Corrosion Resistance of the Cr2Nb Laves Phase

被引：0

作者：

Zhang Ting ^{[1
]}

Li Shuangming ^{[1
]}

Li Kewei ^{[1
]}

Xue Yunlong ^{[1
]}

Zhong Hong ^{[1
]}

Fu Hengzhi ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2015年 / 44卷 / 03期

关键词：

vacuum non-consumable arc melting; Cr-Nb-Ti ternary alloy; microstructure; mechanical properties; corrosion resistance; IN-SITU COMPOSITES; FRACTURE-TOUGHNESS; HIGH-TEMPERATURES; ALLOYS; CR; MICROSTRUCTURES; 1ST-PRINCIPLES; METALLURGY; STABILITY; NBCR2;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ternary alloys of Cr2Nb-XTi (X=5, 10, 15, at%) were prepared by vacuum non-consumable arc melting. The solidification microstructures of arc-melted alloy were investigated using optical microscope (OM), X-ray diffraction (XRD) as well as scanning electron microscope (SEM), and the effects of Ti addition on the mechanical properties and corrosion resistance of Laves- phase Cr2Nb were also studied. The results show that the solidified microstructures of these ternary alloys are mainly composed of C15-Cr-2(Nb,Ti), alpha-(Ti,Nb) and beta-(Nb,Ti). A metastable phase C14-Cr-2(Nb,Ti) is observed only in the top part of the arc-melted ingots of Cr2Nb-5Ti and Cr2Nb-10Ti alloys at low cooling rate. Meanwhile, with the increase in Ti content, the microhardness of Cr2Nb-XTi alloy decreases gradually and the alloy fracture toughness increases continuously. As the Ti content reaches 15at%, the fracture toughness of the alloy Cr2Nb-15Ti could attain 3.1 MPa.m(1/2), twice of that of the single-phase Cr2Nb. In addition, as the Ti content increases, the corrosion performance of the alloy Cr2Nb-XTi declines, but the alloy Cr2Nb-15Ti still exhibits well corrosion resistance.

引用

页码：697 / 702

页数：6

共 21 条

[1] Theoretical investigations of the elastic constants in Laves phases
Anton, H
Schmidt, PC
[J]. INTERMETALLICS, 1997, 5 (06) : 449 - 465
[2] The fracture resistance and crack tip micromechanics of in-situ intermetallic composites
Chan, KS
Davidson, DL
[J]. JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY, 1996, 48 (09): : 62 - 67
[3] The fracture toughness of niobium-based, in situ composites
Chan, KS
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1996, 27 (09): : 2518 - 2531
[4] The effects on fracture toughness of ductile-phase composition and morphology in Nb-Cr-Ti and Nb-Si in situ composites
Davidson, DL
Chan, KS
Anton, DL
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1996, 27 (10): : 3007 - 3018
[5] MECHANICAL-PROPERTIES OF TI-CR-NB ALLOYS AND PROSPECTS FOR HIGH-TEMPERATURE APPLICATIONS
FLEISCHER, RL
ZABALA, RJ
[J]. METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1990, 21 (08): : 2149 - 2154
[6] Fu H.Z., 1998, J. Aeronaut. Mater, V18, P52
[7] Phase field and room-temperature mechanical properties of C15 Laves phase in Nb-Hf-Cr and Nb-Ta-Cr alloy systems
Fujita, M.
Kaneno, Y.
Takasugi, T.
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2006, 424 (1-2) : 283 - 288
[8] The mechanical properties and the deformation microstructures of the C15 Laves phase Cr2Nb at high temperatures
Kazantzis, A. V.
Aindow, M.
Jones, I. P.
Triantafyllidis, G. K.
De Hosson, J. Th. M.
[J]. ACTA MATERIALIA, 2007, 55 (06) : 1873 - 1884
[9] First-principles study of the ideal cleavage fracture of Cr2Nb microalloyed by X (Al, Ni, Co, Ti)
Li, Chenliang
Wang, Biao
Li, Yuanshi
Wang, Rui
[J]. INTERMETALLICS, 2009, 17 (06) : 394 - 399
[10] Liu C T, 2000, INTERMETALLICS, V8, P11

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