High-tensile-strength and ductile novel Ti-Fe-N-B alloys reinforced with TiS nanowires

被引：17
作者：
Huang, Liqing [1 ]
Qian, Ma [1 ,2 ]
Wang, Lihua [1 ]
Chen, Zhi-Gang [1 ,3 ]
Shi, Zhiming [1 ]
Nguyen, Van [1 ]
Zou, Jin [1 ,4 ]
机构：
[1] Univ Queensland, Sch Mech & Min Engn, Brisbane, Qld 4072, Australia
[2] RMIT Univ, Sch Engn, Melbourne, Vic 3000, Australia
[3] Univ Southern Queensland, Ctr Future Mat, Springfield, Qld 4300, Australia
[4] Univ Queensland, Ctr Microscopy & Microanal, Brisbane, Qld 4072, Australia
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 708卷
基金：
澳大利亚研究理事会;
关键词：
Titanium alloys; Alloy design; TiB nanowires; Spark plasma sintering; Tensile properties; MECHANICAL-PROPERTIES; TITANIUM; COMPOSITES; MICROSTRUCTURE; NITRIDE; ALPHA;
D O I：
10.1016/j.msea.2017.09.136
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this study, we designed and fabricated high-performance Ti-Fe-N-B alloys by sintering a blend of Ti powder, Fe powder and BN nanopowder using spark plasma sintering. During sintering, TiB nanowires nucleated from the surfaces of Ti powder particles on which the BN nanoparticles were dispersed, and then grew into the nearby Ti matrix forming a three-dimensional (3D) network-woven architecture throughout the Ti matrix. The TiB nanowires were about 10-30 mu m in length and 50-200 nm in diameter after sintering. Their existence suppressed the formation of the continuous alpha-Ti phase along the beta-Ti grain boundaries and refined the microstructure of the Ti matrix. A large quantity of alpha-Ti nanoplates precipitated along the planes (110)(beta.Ti) in the Ti-Fe-N-B alloys. The as-sintered Ti-4.5Fe-0.14N-0.11B alloy achieved a high tensile strength of 1176 MPa with a significant tensile elongation of 10.4%, which satisfied the requirements for the tensile properties of mill-annealed Ti6Al4V in the solution-treated and aged (STA) condition. The TiB nanowires, alpha-Ti nanoplates, Fe solute atoms, and N solute atoms in the matrix all contributed to the high tensile strength.
引用
收藏
页码：285 / 290
页数：6
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