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| MICROSTRUCTURE AND AGE HARDENING IN RAPIDLY SOLIDIFIED Mo ALLOYS |
| by NING Yuantao (Institute of Precious Metals; Kunming); WHANG; S. H. (Barnett Institute of Northeastern University; Boston; USA) (Manuscript received 27 August; 1986; revised manuscript 11 March; 1987) |
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Cite this article:
by NING Yuantao (Institute of Precious Metals; Kunming); WHANG; S. H. (Barnett Institute of Northeastern University; Boston; USA) (Manuscript received 27 August; 1986; revised manuscript 11 March; 1987). MICROSTRUCTURE AND AGE HARDENING IN RAPIDLY SOLIDIFIED Mo ALLOYS. Acta Metall Sin, 1987, 23(6): 491-497.
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Abstract The spin ribbons and splat foils of various Mo-base alloys were made by the arc melt-spinning and hammer-anvil techniques. The mechenical properties, surface topography and microstructure have been studied. A strong grain refinement and an age hardening response have been observed in the as-quenched and annealed specimens, respectively. The precipitates which are responsible for age hardening were identified to be Mo_2B(C16, BCT) in Mo-B alloys and Mo_2B and more stable ZrB_2(A_3) in Mo-Zr-B alloys. The alloys in which the borides are as strengthening phases possess very high strength and hardness, indicating the prospect of developing high strength Mo-base alloys by rapidly solidified techniques.
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Received: 18 June 1987
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1 Whang S H, Giessen B C. PROC 3rd Conf Rapid Solidification Processing, Washington D C: NBS, 1982: 439
2 Whang S H. J Met, 1984; 36(4) : 34
3 Moffatt WG. Binary Phase Diagram Handbook, Vol.Ⅰ, B-Mo Phase Diagram, General Electric Company, Printed in USA, 1976
4 Moffatt W G. Binary Phase Diagram Handbook, Vol. Ⅰ, B-Er Phase Diagram, General, Electric Company, Printed in USA, 1976
5 Selected Powder Diffraction Data, Metal and Alloys Data Book, First Edition, Published by the International Centre for Diffraction Data, Ⅱ, 25-561, 1978: 616
6 Shunk F A. Constitution of Binary Alloys, Second Supplement, New York: McGraw-Hill, 1969: 91
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8 Elliott R P. Constitution of Binary Alloys, First Supplement, New York: McGraw-Hill, 1965: 1464 |
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