Microstructure and mechanical properties of intermetallic Al3Ti alloy with residual aluminum

被引:42
|
作者
Lu, Zichuan [1 ]
Wei, Ningxia [1 ]
Li, Peng [1 ]
Guo, Chunhuan [1 ]
Jiang, Fengchun [1 ]
机构
[1] Harbin Engn Univ, Minist Educ, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Peoples R China
基金
中国国家自然科学基金;
关键词
Intermetallic; Residual aluminum; Mechanical property; Post heat-treatment; DUPLEX STAINLESS-STEEL; LAMINATE COMPOSITES; GALVANIC CORROSION; FRACTURE-BEHAVIOR; RESISTANCE-CURVE; MIL COMPOSITES; COOLING RATE; VANADIUM; PHASES; DEFORMATION;
D O I
10.1016/j.matdes.2016.08.025
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Intermetallic Al3Ti alloys with different volume fractions of residual aluminum were synthesized via reactive foil sintering in vacuum condition using commercial purity aluminum foils and Ti-6Al-4V alloy foils. Microstructure evolution, elemental analysis, fracture mechanism and phase identification were performed using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) technique, respectively. Mechanical properties were measured by quasi-static compression and Vickers hardness tests. Experimental results indicated that the ductile phase Al distributes in the grain boundaries of the brittle matrix Al3Ti, which increases the compression failure strain of the Al3Ti alloy dramatically compared with the monolithic intermetallic Al3Ti alloy. The compressive stress-strain curve showed a typical elastic-plastic deformation behavior. Moreover, it also demonstrated that the post-heat treatment plays an important role in the mechanical properties due to the formation of alpha-Al2O3 and Al3Ti grain coarsening. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:466 / 474
页数:9
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