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Wear Properties of A Shock Consolidated Metallic Glass and Glass-Crystalline Mixtures

Vreeland, Thad, Jr. and Thadhani, Naresh N. and Mutz, Andrew H. and Thomas, Susan P. and Nibert, Roger K. (1985) Wear Properties of A Shock Consolidated Metallic Glass and Glass-Crystalline Mixtures. In: Rapidly Solidified Alloys and Their Mechanical and Magnetic Properties. Materials Research Society Symposia Proceedings. No.58. Materials Research Society , Pittsburgh, PA, pp. 123-126. ISBN 9780931837234.

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Powder flakes prepared from 50 μm thick melt spun ribbons of Markomet 1064 (Ni_(52.5)Mo_(38)Cr_8 B_(1.5) wt%) were shock consolidatedin the unannealed and annealed condition. The unannealed flakes (microhardness 933 kg/mm^2) are amorphous while flakes annealed at 900ºC for 2 hours have an fcc structure with a grain size of 0.3 μm and microhardness of 800 kg/mm^2. The shock consolidated amorphous powder compact (250 kJ/kg shock energy) shows no crystal peaks in an X-ray diffractometer scan. Compacts of annealed powder (400 to 600 kJ/kg shock energies) contain amorphous material (18-21%) which was rapidly quenched from the melt formed at interparticle regions during the consolidation process. The microhardness of the amorphous interparticle material is 1100 kg/mm^2. Wear properties of the compacts measured in low velocity pin on disk tests show low average dynamic friction values (∿0.03). The 60 hour cumulative wear appears to correlate with the energy of shock compaction and surface porosity of the compacts rather than the metallic glass content.

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Additional Information:© 1986 Materials Research Society. The shock consolidations were carried out using the facilities of Prof. Thomas Ahrens in the Caltech Seismological Laboratories and were supported in part by the National Science Foundation under Grant No. DMR-8315214 and the Caltech Program in Advanced Technologies sponsored by Aerojet General, General Motors, GTE, and TRW Laboratories. Wear Tests were performed by Mr. Marc Yesnik at the Roy C. Ingersoll Research Center.
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Aerojet GeneralUNSPECIFIED
Series Name:Materials Research Society Symposia Proceedings
Issue or Number:58
Record Number:CaltechAUTHORS:20150126-105224408
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Official Citation: Thad Vreeland, Jr, Naresh N. Thadhani, Andrew H. Mutz, Susan P. Thomas and Roger K. Nibert (1985). Wear Properties of A Shock Consolidated Metallic Glass and Glass-Crystalline Mixtures. MRS Proceedings, 58, 123 doi:10.1557/PROC-58-123.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:54076
Deposited By: Tony Diaz
Deposited On:26 Jan 2015 19:29
Last Modified:10 Nov 2021 20:29

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