Production of increased ductility in articles consolidated from

Details Production of increased ductility in articles consolidated from Production of increased ductility in articles consolidated from

1984-12-07

1986-04-15

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75126A, 75126P, 419 23, 419 30, 419 33, 419 28, 419 29, 419 41, 419 48, 419 50, 420436, 420437, 420439, 420442, 420445, 420451, B22F 300

Patent

active

045825360

ABSTRACT:
The present invention provides a method for consolidating rapidly solidified, transition metal alloys which includes the step of compacting a plurality of alloy bodies at a temperature ranging from about 0.90-0.99 Tm (melting temperature in .degree.C.) for a time period ranging from about 1 min to 24 hours. The alloy bodies contain at least two transition metal elements and consist essentially of the formula (Fe,Co and/or Ni).sub.bal (W, Mo, Nb and/or Ta).sub.a (Al and/or Ti).sub.b (Cr).sub.c (B and/or C).sub.d (Si and/or P).sub.e, wherein "a" ranges from about 0-40 at. %, "b" ranges from about 0-40 at. %, "c" ranges from about 0-40 at. %, "d" ranges from about 5-25 at. %, and "e" ranges from about 0-15 at. %. The alloy bodies also have a substantially homogeneous and optically featureless structure.
A consolidated article produced in accordance with the present invention has increased ductility and toughness; with a tensile strength of at least about 1200 MPa and an impact resistance of at least 10 Joules (unnotched charpy test). The article is composed of a crystalline, transition metal alloy, which has an average grain size of greater than 3 micrometers and contains separated precipitate particles ranging from about 3-25 micrometers in average size.

REFERENCES:
patent: 4347076 (1982-08-01), Ray et al.
patent: 4365994 (1982-12-01), Ray
patent: 4395464 (1983-07-01), Panchanathan et al.
patent: 4404028 (1983-09-01), Panchanathan et al.
patent: 4410490 (1983-10-01), Ray et al.
patent: 4473402 (1984-09-01), Ray et al.
E. R. Thompson, "High Temperature Aerospace Materials Prepared by Powder Metallurgy", 1982, pp. 213-242.
S. K. Das, et al., "Ni-Mo-B Alloys:Metallic Glass to Ductile Crystalline Solid", Dec. 6-8, 1982.
D. Raybould, "Ultra Rapidly Solidified Alloys for Dies, Tool and Wear Parts", May 1984.
F. L. Jagger, et al., "Production of Sintered High-Speed-Steel Cutting-Tool Materials from Prealloyed Powders", Jun. 2, 1981.
M. T. Podab, et al., "The Mechanism of Sintering High Speed Steel to Full Density", 1981.
C. C. Wan, "Crystallization Behavior and Properties of Rapidly Solidified Ni-Mo-B Alloys", 1981.

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