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Strengthening Molybdenum by Powder Metallurgical Internal Oxidation of Zrmo2.

Authors
O'Brien-WL; Blickensderfer-RA
Source
NTIS: PB 237 844 :14 pages
Link
NIOSHTIC No.
10009301
Abstract
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.
Publication Date
19740101
Document Type
IH; Report of Investigations
Fiscal Year
1974
NTIS Accession No.
PB-237844
NTIS Price
A03
Identifying No.
RI 7958
NIOSH Division
ALRC;
Source Name
NTIS: PB 237 844
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