Zirconium modified Nb-22Ti-16Si alloys fabricated by laser additive manufacturing: Microstructure and fracture toughness

被引：41
作者：
Li, Yunlong [1 ,2 ]
Lin, Xin [1 ,2 ]
Hu, Yunlong [1 ,2 ]
Kang, Nan [1 ,2 ]
Gao, Xuehao [1 ,2 ]
Dong, Hongbiao [3 ]
Huang, Weidong [1 ,2 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
[2] Northwestern Polytech Univ, MIIT China, Key Lab Met High Performance Addit Mfg & Innovat, Xian 710072, Shaanxi, Peoples R China
[3] Univ Leicester, Dept Engn, Leicester LE1 7RH, Leics, England
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 783卷
基金：
中国国家自然科学基金;
关键词：
Laser additive manufacturing; Nb-Si alloys; Powder mixture; Microstructure; Fracture toughness; SI-BASED ALLOYS; MECHANICAL-PROPERTIES; OXIDATION RESISTANCE; NB; PHASE; TI; EVOLUTION; ROOM; CR; STRENGTH;
D O I：
10.1016/j.jallcom.2018.12.280
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The microstructure and mechanical behavior of Nb-22Ti-16Si-xZr alloys (x = 0, 1, 5, 10, 15 at.%) were investigated by using laser solid forming (LSF) additive manufacturing from elemental powder mixture of Nb, Ti, Si and Zr. The as-deposited Nb-22Ti-16Si alloy presented a microstructure consisted of primary Nb-base solid solution (Nbss) dendrite and Nbss/(Nb)(3)Si eutectic dendrites. The eutectic Nbss/gamma-(Nb)(5)Si-3 appeared with a morphology of lamellar structural feature when 1 at.%Zr was added, and its content increased with Zr content. Nbss/(Nb)(3)Si eutectic dendrites disappeared when Zr content reaches 10 at.%. Further increasing of Zr (15 at.%) result in the appearance of a hypereutectic microstructure, which consisted by primary gamma-(Nb)(5)Si-3 and eutectic Nbss/y-(Nb)(5)Si-3. As the nominal Zr content increased, the fracture toughness of LSFed Nb-22Ti-16Si-xZr alloy increases first and reaches the maximum value (15.28 MPa m(1/2)) in LSFed Nb-22Ti-16Si-5Zr alloy, and then decreases. (C) 2018 Elsevier B.V. All rights reserved.
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页码：66 / 76
页数：11
相关论文
共 44 条
[21]   Synthesis and stabilization of a new phase regime in a Mo-Si-B based alloy by laser-based additive manufacturing [J].
Makineni, S. K. ;
Mini, A. R. ;
Jaegle, E. A. ;
Springer, H. ;
Raabe, D. ;
Gault, B. .
ACTA MATERIALIA, 2018, 151 :31-40
[22]   PHASE-RELATIONS AND TRANSFORMATION KINETICS IN THE HIGH NB REGION OF THE NB-SI SYSTEM [J].
MENDIRATTA, MG ;
DIMIDUK, DM .
SCRIPTA METALLURGICA ET MATERIALIA, 1991, 25 (01) :237-242
[23]   STRENGTH AND DUCTILE-PHASE TOUGHENING IN THE 2-PHASE NB/NB5SI3 ALLOYS [J].
MENDIRATTA, MG ;
LEWANDOWSKI, JJ ;
DIMIDUK, DM .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1991, 22 (07) :1573-1583
[24]   Effects of Zr on the eutectoid decomposition behavior of Nb3Si into (Nb)/Nb5Si3 [J].
Miura, S ;
Aoki, M ;
Saeki, Y ;
Ohkubo, K ;
Mishima, Y ;
Mohri, T .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2005, 36A (03) :489-496
[25]   High temperature strength, fracture toughness and oxidation resistance of Nb-Si-Al-Ti multiphase alloys [J].
Murayama, Yonosuke ;
Hanada, Shuji .
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, 2002, 3 (02) :145-156
[26]   Study of the effects of Zr addition on the microstructure and properties of Nb-Ti-Si based ultrahigh temperature alloys [J].
Qiao, Yanqiang ;
Guo, Xiping ;
Zeng, Yuxiang .
INTERMETALLICS, 2017, 88 :19-27
[27]   Microstructure and deformation behavior of Ti-6A1-4V alloy by high-power laser solid forming [J].
Ren, Y. M. ;
Lin, X. ;
Fu, X. ;
Tan, H. ;
Chen, J. ;
Huang, W. D. .
ACTA MATERIALIA, 2017, 132 :82-95
[28]   ENVIRONMENTAL-EFFECTS ON DUCTILE-PHASE TOUGHENING IN NB5SI3-NB COMPOSITES [J].
RIGNEY, JD ;
SINGH, PM ;
LEWANDOWSKI, JJ .
JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY, 1992, 44 (08) :36-41
[29]   Printability of gas atomized Mo-Si-B powders by laser metal deposition [J].
Schmelzer, J. ;
Rittinghaus, S. -K. ;
Weisheit, A. ;
Stobik, M. ;
Paulus, J. ;
Gruber, K. ;
Wessel, E. ;
Heinze, C. ;
Krueger, M. .
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2019, 78 :123-126
[30]   Toughening of α-Nb5Si3 by Ti [J].
Shi, Songxin ;
Zhu, Linggang ;
Zhang, Hu ;
Sun, Zhimei .
JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 689 :296-301
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