MECHANICAL-PROPERTIES AND THERMAL-STABILITY OF TI-BASED AND AL-BASED AMORPHOUS WIRES PREPARED BY A MELT EXTRACTION METHOD

被引:33
作者
INOUE, A
AMIYA, K
KATSUYA, A
MASUMOTO, T
机构
[1] Institute for Materials Research, Tohoku University
[2] Development Center, Unitika Co. Ltd
[3] Development Dept, NHK SPRING Co. Ltd
来源
MATERIALS TRANSACTIONS JIM | 1995年 / 36卷 / 07期
关键词
AMORPHOUS ALLOY WIRE; TITANIUM BASE ALLOY; ALUMINUM BASE ALLOY; LARGE GLASS-FORMING ABILITY; MELT EXTRACTION METHOD; HOMOGENEOUS SOLIDIFICATION; HIGH MECHANICAL STRENGTH;
D O I
10.2320/matertrans1989.36.858
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The application of a melt extraction method to Ti- and Al-based alloys with highly reactive molten states was found to cause the formation of continuous amorphous alloy wires with good bending ductility. The wire diameter is in the range of 40 to 150 mu m for Ti40Zr10Cu50 and 40 to 100 mu m for Al85Ni10Ce5 and the difference reflects the difference in the glass-forming ability between both alloys. The glass transition temperature, crystallization temperature and heat of crystallization are 629 K, 691 K and 1.71 kJ/mol, respectively, for the Ti-based wire with the diameter of 100 mu m and 530 K, 546 K and 0.37 kJ/mol for the Al-based wire with the diameter of 50 mu m. The tensile strength is 2000 MPa for the former wire and 930 MPa for the latter wire. The thermal stability and mechanical strength are nearly the same as those for the melt-spun amorphous ribbons with the thickness of 15 mu m. No appreciable concave resulting from the use of the copper wheel with a steep edge is seen in the cross section and the solidification is completed during the flight after extraction. The cooling rate of the Al-based wire with the diameter of 70 mu m is estimated to be of the order 6 x 10(4) K/s. Thus, the formation of the amorphous alloy wires with a circular cross section is due to the rapid solidification of the fine supercooled liquid stream in the suppression of heterogeneous nucleation during the high-velocity flight in the argon atmosphere. The combination of the solidification process with high cooling rate and the good formability into the wire shape allows us to expect that the present process develops as an alternative method to produce amorphous alloy wires in various kinds of alloy systems including reactive elements as main components.
引用
收藏
页码:858 / 865
页数:8
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