High temperature fracture behavior of tungsten fiber reinforced copper matrix composites under dynamic compression

被引：12
作者：
Wu, Z. [1 ]
Wu, G. H. [1 ,2 ]
Kang, P. C. [1 ]
Gou, Q. [1 ]
Chen, G. Q. [1 ]
Jiang, L. T. [1 ]
机构：
[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150080, Peoples R China
[2] Harbin Inst Technol, State Key Lab Adv Welding Prod Technol, Harbin 150001, Peoples R China
来源：
MATERIALS & DESIGN | 2011年 / 32卷 / 10期
关键词：
ADIABATIC SHEAR BANDS; MECHANICAL-PROPERTIES; ALLOY; PENETRATOR; EVOLUTION; IMPACT; FE; NI;
D O I：
10.1016/j.matdes.2011.06.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
W(f)/Cu(82)Al(10)Fe(4)Ni(4) composite was fabricated by flow casting method. Dynamic compression tests with strain rate of 1600 s(-1) at 20 degrees C, 200 degrees C, 400 degrees C and 600 degrees C were finished by means of Split Hopkinson Pressure Bar (SHPB). The results showed that the composites possessed obvious high temperature softening behaviors. The damages of W(f)/Cu(82)Al(10)Fe(4)Ni(4) composites all occurred within the tungsten fibers when compressed at 20 degrees C, 200 degrees C and 400 degrees C, indicating that the interface strength of the composites was high. While the damages of the composites occurred either in the tungsten fibers or in the matrix at 600 degrees C. in addition, the melt of matrix alloy also occurred. Microstructure of the composites after dynamic compressing at 600 degrees C was analyzed by transmission electron microscope (TEM), observation revealed that there were a lot of high-density dislocations, stacking faults and twins existing in the matrix. It was also found that the precipitated phase in the matrix played the role of the second phase strengthening. (C) 2011 Elsevier Ltd. All rights reserved.
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收藏
页码：5022 / 5026
页数：5
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