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Ductile Nb alloys with reduced density and cost

Ductile Nb alloys with reduced density and cost

Authors :
T.M. Butler
Oleg N. Senkov
Satish I. Rao
K.J. Chaput
Source :
Journal of Alloys and Compounds. 808:151685
Publication Year :
2019
Publisher :
Elsevier BV, 2019.

Abstract

Several Nb-based alloys containing Ti, Mo and W were produced and their microstructure, phase composition and mechanical properties in the temperature range of 23–1200 °C were reported and compared with a high-strength commercial Nb alloy C-3009, which contains Hf and W alloying elements. Replacement of Hf with Ti and W with Mo led to alloys with considerably reduced density and cost, as well as with reduced micro-segregation of the alloying elements. The strengthening effect from W was higher than from Mo at temperatures above ∼600 °C and more amount of Mo was required to compensate the strength decrease. The strengthening effects from Hf and Ti were comparable at temperatures up to 1000 °C; however, at 1200 °C the effect from Hf was superior. It was concluded that the Nb–Mo–Ti system can be used as a baseline for the development of high strength, high-temperature alloys using alloying with other elements.

Details

ISSN :
09258388
Volume :
808
Database :
OpenAIRE
Journal :
Journal of Alloys and Compounds
Accession number :
edsair.doi...........cc2106a7cdd20c5e802dcbdaf30d4877
Full Text :
https://doi.org/10.1016/j.jallcom.2019.151685