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Strengthening Molybdenum by Powder Metallurgical Internal Oxidation of Zrmo2.
NTIS: PB 237 844 :14 pages
Molybdenum alloys with good strength properties at elevated temperatures were produced by the powder metallurgical internal oxidation method previously applied to tungsten and known as oxyreaction strengthening. Commercial molybdenum powders were blended with 0 to 10 pct of a reactive powder, zrmo2. The effects of composition, blending procedure, and sintering conditions on strength properties at elevated temperatures were studied. Strengthening was attributed to zirconium in solid solution with molybdenum and to the presence of submicrometer particles of zro2. Several alloys had tensile strength and stress-rupture properties comparable with those of the best commercial alloys. The maximum tensile strengths obtained were 92 kpsi at 1,200 deg c and 53 kpsi at 1,316 deg c. The maximum stress-rupture life at 30 kpsi and 1,200 deg c was 145 hours.
IH; Report of Investigations
NTIS Accession No.
NTIS: PB 237 844
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division