Microstructure and mechanical properties of Ti-based bulk metallic glass composite at different annealing temperatures

被引：0
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作者：
机构：
[1] State Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou
[2] Key Laboratory of Nonferrous Metal Alloys and Processing of the Ministry of Education, Lanzhou University of Technology, Lanzhou
来源：
Kou, Shengzhong | 1600年 / Editorial Office of Chinese Journal of Rare Metals卷 / 38期
关键词：
Annealing; Bulk metallic glass composite; Mechanical property; Microstructure;
D O I：
10.13373/j.cnki.cjrm.2014.04.016
中图分类号：
学科分类号：
摘要：
Ti40Ni40Cu20 bulk metallic glass composite rods were prepared by electromagnetic induction levitation melting-copper mold suction casting. Effects of different annealing temperatures(150, 250, 350℃, 0.5 h) on microstructure and mechanical properties of Ti-based bulk metallic glass composite were investigated by means of X-ray diffraction (XRD), metallurgical microscope and the computer controlled electronic mechanical testing system. The results showed that, B2-TiNi and B19-TiNi precipitated in as-cast and annealing samples, and the volume fraction and grain size of precipitated phase increased after annealing; meanwhile, low-temperature annealing can make the martensite transform to austenite; compressive test of all alloy samples showed the significant work-hardening; compressive strength and plastic strain first increased and then slightly declined with the increase of annealing temperature, but were better than those of the cast specimens. Compressive strength and plastic strain increased from 2247 MPa and 11.4% of as-cast alloy to 2541 MPa and 19.5% of 150℃, 0.5 h annealing alloy. It showed that the suitable annealing temperature could obviously improve the mechanical properties of Ti-based bulk metallic glass composite. It showed that the suitable annealing temperature could effectively control the volume fraction and grain size of precipitated phase, thus obviously improved the comprehensive mechanical properties of Ti-based bulk metallic glass composite.
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页码：641 / 645
页数：4
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