MICROSTRUCTURAL EVOLUTION AND MECHANICAL PROERTIES OF Ti-(Ni, Fe)-Sn ULTRAFINE EUTECTIC ALLOYS

摘要：

Ultrafine eutectic alloys have been developed in Ti-Ni, Ti-Fe and Ti-(Ni, Fe)-Sn alloys. The Ti76Ni24 and (Ti74Ni26)97Sn3 ultrafine eutectic alloys consist of a mixture of a-Ti and Ti2Ni phases, and β-Ti(Sn) and Ti2Ni phases, respectively, whereas the Ti70.5Fe29.5 and (Ti70.5Fe29.5)97Sn3 alloys are composed by a mixture of β-Ti(Sn) and FeTi phases with relatively spherical colony. The compression tests of Ti76Ni24, (Ti74NJ26)97Sn3 and Ti70.5Fe29.5 ultrafine eutectic alloys reveal a strength of 1400 ～ 1800 MPa with very limited plastic strain of 0.1 ～ 1％. On the contrary, a (Ti70.5Fe29.5)97Sn3 alloy exhibits high strength of 2270 MPa with enhanced plastic strain of 3.1％. Based on these results, it is feasible to suggest that the eutectic morphology and interfacial coherency between the Ti solid solution and intermetallic phases influence to control the macroscopic plasticity of the Ti-Ni and Ti-Fe ultrafine eutectic alloys.

关键词： Composites ternary alloy systems alloy design casting microstructure

作者: DONG HYOUK PI KI BUEM KIM JIN MAN PARK JUN HEE HAN DO HYANG KIM

作者单位: Department of Advanced Materials Engineering, Sejong University, 98 Cunja-dong, Gwnagjin-gu, Seoul, Center for Non-crystalline Materials, Department of Metallurgical Engineering, Yonsei University, 13

会议类型: 国际会议

会议名称: 第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)

会议地点: 哈尔滨

会议语种:英文

页码: 953-959

在线出版日期: 2008-09-03（万方平台首次上网日期，不代表论文的发表时间）