Effects of Zr additions on the microstructure and the mechanical behavior of PM Mo-Si-B alloys

M. Krüger, D. Schliephake, P. Jain, K. S. Kumar, G. Schumacher, M. Heilmaier

Research output: Contribution to journalArticleResearchpeer-review

32 Citations (Scopus)

Abstract

In this article, our current understanding on the effects of Zr additions on the properties of three-phase Mo-Si-B alloys is reported. This novel group of materials having high melting points around 2000 C have been identified as potential alloy systems for structural applications at temperatures beyond 1200 C, e.g., for substituting or supplementing state-of-the-art nickel-base superalloys in the power generation industry. In earlier work, we developed various Mo-Si-B materials with very good high-temperature deformation behavior and, in addition, that satisfy oxidation performance. Minimum brittle-to-ductile transition temperatures of around 950 C, however, do not meet the requirements for high-grade stressed structural materials. Therefore, in a second trial, we investigate the influence of the alloying element Zr (which was already proven to increase the strength as well as the ductility of a single-phase Mo-Si alloy) on three-phase Mo-Si-B alloys.

Original languageEnglish
Pages (from-to)301-306
Number of pages6
JournalJOM
Volume65
Issue number2
DOIs
Publication statusPublished - 1 Feb 2013
Externally publishedYes

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