期刊
SCRIPTA MATERIALIA
卷 65, 期 5, 页码 428-431出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.05.024
关键词
Ni alloys; Grain-boundary segregation; Tensile test; Embrittlement; Bismuth
类别
资金
- Alexander von Humboldt Foundation (AvH)
- Deutscher Akademischer Austausch Dienst (DAAD)
- National Natural Science Foundation of China (NSFC) [51001011]
- Deutsche Forschungsgemeinschaft (DFG) [SCHM 1182/9]
- Research Fund for the Doctoral Program of Higher Education of China [20090006120011]
The tensile ductility of high-purity Ni and binary Ni(Bi) alloy were studied in the temperature range of 400-850 degrees C. Ni(Bi) alloy shows evident intermediate temperature embrittlement with a minimum ductility between 700 and 750 degrees C, while high-purity Ni does not. It is concluded that this embrittlement must be an impurity effect. On the basis of quantitative estimates, the embrittlement is interpreted as being caused by thermo-induced non-equilibrium grain-boundary segregation of Bi. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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