Effects of Nb Content on Yield Stren

Effects of Nb Content on Yield Strength of NiTiNb Alloys in Martensite State

Two near single-phase NiTiNb alloys-Ni_(50)Ti_(48)Nb_2 and Ni_(49.5)Ti_(46.5)Nb_4-are prepared and studied by means of scanning elec-tron microscopy (SEM), energy dispersive spectroscopy (EDS), differential scanning calorimetry (DSC) and tensile tests in order to unearth the effects of Nb-atom solid solution in NiTi phase on the yield strength induced by self-accommodation of martensite variants. The results show that the yield strength of near single-phase NiTiNb alloys varies inversely with the amount of Nb-atoms solid-dissolved in NiTi phase. From the results out of the prior and current studies, it can be surmised that the effects of Nb content on the yield strength of NiTiNb alloys in martensite state depend on the coaetion. Nb solid solution weakening mechanism and β-Nb phase composite strengthening mechanism. This inference might be a satisfactory explanation to the fact that the yield strength of (NiTi)_(50-0.5x)Nb_x alloys in martensite state begins with decline and then rises when the Nb content in-creases.

作 者： Xiao Fu Ma Guojun Zhao Xinqing Xu Huibin   作者单位： School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China  刊 名： 中国航空学报（英文版）  ISTIC 英文刊名： CHINESE JOURNAL OF AERONAUTICS  年，卷(期)： 2009 22(6)  分类号： V2  关键词： NiTiNb alloy   martensite   yield strength   Nb content  

【Effects of Nb Content on Yield Stren】相关文章：

The content of an application letter05-04

Cause and Effects of Iron Deficiencies05-04

Effects of Formaldehyde Inhalation on Lung of Rats04-27

Mapping of QTLs for Leaf Malondialdehyde Content Associated with Stress Tolerance in Rice04-26

Environmental Effects on Microstructural Stability of SiC/SiC Composites04-26

Evaluation of dust activity and climate effects in North China04-26

Observations on carbon and nitrogen content of suspended matter in aheadwater stream in Hong Kong04-26

EFFECTS OF ENSO ON THE RELATIONSHIP BETWEEN IOD AND SUMMER RAINFALL IN CHINA04-27

Effects of nutrients on Microcystis growth more easily forming bloom04-25

Effects of sleep deprivation on gamma oscillation of waking human EEG04-26