Effect of semi-solid heat-treatment on microstructure and mechanical properties of Ti-based bulk armorphous composites

被引：0

作者：

Zhao, Yan-Chun ^{[1
,2
]}

Yuan, Xiao-Peng ^{[1
,2
]}

Kou, Sheng-Zhong ^{[1
,2
]}

Zhao, Zhi-Ping ^{[1
]}

Luo, Wen-Tao ^{[1
]}

Li, Chun-Yan ^{[1
,2
]}

Yuan, Zi-Zhou ^{[1
,2
]}

机构：

[1] State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou

[2] Wenzhou Research Institute of Pump and Valve Engineering, Lanzhou University of Technology, Wenzhou

来源：

Gongneng Cailiao/Journal of Functional Materials | 2015年 / 46卷 / 03期

关键词：

Bulk amorphous composites; Deformation induced transformation; Mechanical property; Microstructure; Semi-solid heat-treatment;

D O I：

10.3969/j.issn.1001-9731.2015.03.014

中图分类号：

学科分类号：

摘要：

Ti-based bulk amorphous composites, designed by deformation induced transformation effect to enhance the strength and plasticity, were fabricated by suspend melting under an argon atmosphere using a copper mold. And semi-solid heat-treatment was chosen to control the solidification kinetics and optimize the microstructure. The effect of semi-solid heat-treatment on microstructure and mechanical properties of Ti-based bulk amorphous composites were investigated. The results showed that the as-cast compounds microstructure were consist of the supercooled austenite phase, thermally-induced martensite phase and amorphous phase. As loading, the alloys were strengthened and toughed by TRIP effect, and exhibit a strongly work-hardening behavior. The as-cast microstructure of core region contains coarse dendrites with uneven growth. Nevertheless, the semi-solid heat-treated microstructure contains equiaxed grain with higher spheroidization, smaller and more uniform size. The spheroidal grain was formed by the sharp corner solution and plane precipitation growth mechanism. Therefore the composites microstructure was effectively optimized, as well as the comprehensive mechanical properties are further improved. After semi-solid heat-treated, fracture strength and plastic deformation of (Ti0.5Ni0.48Co0.02)80Cu20 were enhanced from 2582 MPa and 15%, to 2745 MPa and 21.5%. ©, 2015, Journal of Functional Materials. All right reserved.

引用

页码：03069 / 03072

页数：3

共 12 条

[1]

Wang W., The nature and properties of amorphous matter, Progress in Physics, 33, 5, pp. 177-351, (2013)

[2]

Das J., Tang M.B., Kim K.B., Et al., “Work-hardenable” ductile bulk metallic glass, Phy Rev Lett, 94, (2005)

[3]

Zhao Y., Kou S., Li C., Et al., Study on microstructure and mechanical properties of Ti66.7Ni20Cu13.3 bulk metallic glass, Journal of Functional Materials, 44, 1, pp. 88-91, (2013)

[4]

Kirkwood D.H., Semisolid metal processing, Inter Mater Reviews, 39, 5, pp. 173-189, (1994)

[5]

Flemings M.C., Behavior of metal alloys in the semisolid state, Metall Trans A, 22, 5, pp. 957-981, (1991)

[6]

Luo S., Tian W., Xie S., Technology and applications of semi-solid forming, Transactions of Nonferrous Metals Society of China, 10, 6, pp. 765-773, (2000)

[7]

Zhang Q., Ma Y., Deng Q., Structural and optical properties of Sb-doped ZnO powders synthesized by hydrothermal method, Journal of Chongqing University of Technology (Natural Science), 26, 8, pp. 61-65, (2012)

[8]

Otsuka K., Sawamura T., Shimizu K., Crystal structure and internal defects of equiatomic TiNi martensite, Physica Status Solidi (a), 5, 2, pp. 457-470, (1971)

[9]

Ji S., The fragmentation of primary dendrites during shearing in semisolid processing, J Mater Sci, 38, 7, pp. 1559-1564, (2003)

[10]

Zheng J., Wang X., Zeng B., First-principles investigation of the magnetic property of ZnO nanosheet with nonmagnetic element Cu, Journal of Chongqing University of Technology (Natural Science), 27, 11, pp. 126-129, (2013)

← 1 2 →