Journal
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
Volume 18, Issue 4-5, Pages 205-211Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S0263-4368(00)00028-7
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Oxide dispersion strengthened (ODS) molybdenum alloys being developed for high temperature applications possess excellent high temperature strength and creep resistance. In addition they exhibit a ductile-to-brittle transition temperature (DBTT) in the worked and stress-relieved condition under longitudinal tensile load well below room temperature, However, in the recrystallized condition, the DBTT may be near or above room temperature. depending on the: volume fraction of oxide dispersion and the amount of prior work. Dilute rhenium additions (7 and 14 wt%) to ODS molybdenum were evaluated to determine their effect on low temperature ductility. The addition of 7 wt%, rhenium to the ODS molybdenum did not significantly enhance the mechanical properties. However, the addition of 14 wt% rhenium to the ODS molybdenum resulted in a DBTT well below room temperature in both the stress-relieved and recrystallized condition. Additionally. the tensile strength of ODS Mo-14 Re is greater than the base ODS molybdenum at 1000-1250 degreesC. (C) 2001 Elsevier Science Ltd. All rights reserved.
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