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Erschienen in:

2018 | OriginalPaper | Buchkapitel

Microstructure and Mechanical Behaviors of Electron Beam Welded Ti₄₄Ni₄₇Nb₉ Shape Memory Alloys

verfasst von : Dan Yang, Haichang Jiang, Mingjiu Zhao, Lijian Rong

Erschienen in: Proceedings of the International Conference on Martensitic Transformations: Chicago

Verlag: Springer International Publishing

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Abstract

The microstructure, martensitic transformation behavior and mechanical properties of the Ti₄₄Ni₄₇Nb₉ electron beam welding joints were systemically studied in this research. The results showed that the microstructure of the fusion zone was composed of equiaxed grains with a small quantity of eutectic structure around the grain boundaries, and the grain size in the fusion zone was smaller than that in the as-cast microstructure. The ultimate tensile strength was a little lower than that of the base. The dissolution of niobium in the matrix obstructed the martensite transformation and decreased the martensite start temperature (M_s). After being deformed at the low temperature, the welding joints exhibited good wide transformation hysteresis, which was similar to that of the base metal.

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Titel: Microstructure and Mechanical Behaviors of Electron Beam Welded Ti44Ni47Nb9 Shape Memory Alloys
verfasst von: Dan Yang
Haichang Jiang
Mingjiu Zhao
Lijian Rong
Verlag: Springer International Publishing
Buch: Proceedings of the International Conference on Martensitic Transformations: Chicago
Print ISBN: 978-3-319-76967-7

Electronic ISBN: 978-3-319-76968-4

Copyright-Jahr: 2018
DOI: https://doi.org/10.1007/978-3-319-76968-4_35

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