Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 20    No. 3    March 2010

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Preparation of porous Ti35Nb alloy and its mechanical properties under monotonic and cyclic loading
LIN Jian-guo(林建国)1,2, ZHANG Yun-fei(张云飞)1, MA Mo(马 蓦)1

1. Faculty of Material and Photoelectronic Physics, Xiangtan University, Xiangtan 411105, China;
2. Key Laboratory of Low Dimensional Materials and Application Technology, Ministry of Education, Xiangtan University, Xiangtan 411105, China

Abstract:The Ti-35%Nb (mass fraction) foams were prepared by a powder metallurgy method, and the microstructure and the mechanical properties of the foams under monotonic and cyclic loading were investigated. The microstructure of the foams mainly consists of β phase, and the foams exhibit the homogenous pore distribution with the average pore size of 252 μm. The foams with 66% porosity show a typical stress—strain curve of the open-cell foams, and the plateau stress is about 56 MPa. The fatigue strength of the foam is 15.12 MPa at 107 cycles. The fractographic analysis of the foams reveals that the cracks nucleate within the struts and grow in a fatigue mechanism, resulting in the acceleration of the fatigue damage of the foams.


Key words: Ti35Nb foams; fatigue properties; powder metallurgy

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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