Ductile Nb alloys with reduced density and cost

JOURNAL OF ALLOYS AND COMPOUNDS

卷:808

Article

Senkov, O. N.¹  Rao, S., I¹  Butler, T. M.¹  Chaput, K. J.¹ 

[1] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA

关键词: Refractory alloys;    Nb alloys;    Microstructure;    Compression properties;   

DOI  :  10.1016/j.jallcom.2019.151685

来源: Elsevier

【 摘 要 】

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 degrees 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 similar to 600 degrees 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 degrees C; however, at 1200 degrees 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. (C) 2019 Elsevier B.V. All rights reserved.

【 授权许可】

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