Tune the mechanical properties of Ti-based metallic glass composites by additions of nitrogen

被引：13
作者：
Li, Liyuan [1 ]
Li, Jinshan [1 ]
Wang, Jun [1 ]
Kou, Hongchao [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi Provinc, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 694卷
关键词：
Ti-based metallic glass composites; Mechanical properties; Solid-solution strengthening; Alloy design; Nitrogen; SUPERCOOLED LIQUID REGION; MICROSTRUCTURE EVOLUTION; DEFORMATION-BEHAVIOR; MATRIX COMPOSITES; CRYOGENIC TEMPERATURE; ALLOYS; PLASTICITY; OXYGEN;
D O I：
10.1016/j.msea.2017.04.010
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Different amounts of nitrogen from 1000 to 14,000 wt ppm were added into the Ti48Zr20Nb12Cu5Be15 bulk metallic glass composites. Results show that addition of nitrogen can increase the yield strength of composites from 1400 to 2350 MPa due to the solid solution strengthening effect. The composites still owns certain plastic strain (above 10% when contains 14,000 ppm nitrogen) before fracture under compressive test. The reason is attribute to nitrogen shows to be a much weaker activator for the formation of brittle alpha-Ti phase as compared with oxygen, which make the beta-Ti dendrite still softer than that of the glassy phase, thus can enhance the strength of the materials but do not deteriorate the plasticity too much. Our research show that nitrogen can be added into the Ti-based metallic glass composites in a very large range to effectively tune the suitable mechanical properties of Ti-based metallic glass composites, without worrying about the catastrophic failure in the process of deformation.
引用
收藏
页码：93 / 97
页数：5
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