Study of a 44NKhMT precision powder alloy produced from nanopowders

Properties of elinvars produced by a powder technology are studied experimentally at all hierarchic structural levels. The problems of an increase in the homogeneity of the structure and a decrease in the porosity of a powder elinvar are solved by alloying with titanium hydride and 2 wt % nickel pow...

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Published in:Russian metallurgy Metally 2011-03, Vol.2011 (3), p.234-238
Main Authors: Antsiferov, V. N., Oglezneva, S. A., Portalov, M. N.
Format: Article
Language:English
Subjects:
Alloy powders
Alloying
Chemistry and Materials Science
Density
Elinvar
Materials Science
Metallic Materials
Modulus of elasticity
Nanostructure
Porosity
Ultimate tensile strength
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description Properties of elinvars produced by a powder technology are studied experimentally at all hierarchic structural levels. The problems of an increase in the homogeneity of the structure and a decrease in the porosity of a powder elinvar are solved by alloying with titanium hydride and 2 wt % nickel powder with a particle size of 50–70 nm. A heat treatment regime is optimized to improve the mechanical properties, namely, the hardness, strength, modulus of elasticity, and porosity. Based on the studied laws of structure formation, a powder elinvar with properties similar to the corresponding cast alloy is produced: its density is 98%, the modulus of elasticity is up to 190 GPa, the ultimate strength is 1100 MPa, and the relative elongation is up to 13%.
doi_str_mv 10.1134/S0036029511030049
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subjects Alloy powders
Alloying
Chemistry and Materials Science
Density
Elinvar
Materials Science
Metallic Materials
Modulus of elasticity
Nanostructure
Porosity
Ultimate tensile strength
title Study of a 44NKhMT precision powder alloy produced from nanopowders
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