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The effect of rapid solidification by spinning and laser melting On the structure of sendust-type alloys

Published online by Cambridge University Press:  15 February 2011

Elena N. Sheftel ,
Dmitry E. Kaputkin  and
Raissa E. Stroug
Elena N. Sheftel
Affiliation:
Baikov Institute of Metallurgy, Russian Academy of Sciences, Leninsky pr.49, Moscow, 117334, Russia
Dmitry E. Kaputkin
Affiliation:
Baikov Institute of Metallurgy, Russian Academy of Sciences, Leninsky pr.49, Moscow, 117334, Russia
Raissa E. Stroug
Affiliation:
Baikov Institute of Metallurgy, Russian Academy of Sciences, Leninsky pr.49, Moscow, 117334, Russia
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Abstract

Dispersion strengthening of the most wear-resistant soft magnetic alloy Sendust (Fe-9.5 wt.%Si -5.5 wt.% Al, HV=5000 MPa) by carbide and boride phases allowed to increase its wear-resistance by a factor of 2 to 3. Hardness of the dispersion strengthened alloys is HV=5500–6250 MPa. The changes in grain size, ordering and hardness of the Sendust and two dispersion strengthened alloys have been studied after spinning and various regimes of laser melting. Both types of rapid solidification caused a significant decrease of both the solid solution grain size and the size of carbide and boride phases. While spinning only significantly decreased the amount of ordered Fe3(Si,Al) phase in all the alloys, laser melting completely suppressed the ordering. The hardness of the boride strengthened alloy increased up to 7550 MPa after laser melting.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 362: Symposium J – Grain-Size and Mechanical Properties--Fundamentals and Applications , 1994 , 137
Copyright
Copyright © Materials Research Society 1995

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