M50 nanostructured steel - The chemical synthesis and characterization of powders and compacts

K. E. Gonsalves; S. P. Rangarajan; C. C. Law; A. Garcia-Ruiz; G. M. Chow

doi:10.1016/S0965-9773(97)00045-7

M50 nanostructured steel - The chemical synthesis and characterization of powders and compacts

K. E. Gonsalves, S. P. Rangarajan, C. C. Law, A. Garcia-Ruiz, G. M. Chow

Unidad Profesional Interdisciplinaria de Ingeniería y Ciencias Sociales y Administrativas (UPIICSA)

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Abstract

Three different chemical routes have been investigated for the synthesis of nanostructured M50 steel. One method involves the ultrasound decomposition of organometallic precursors, the second method is the thermal decomposition of these precursors and the third is the co-reduction of metal halides using a reducing agent. These powders have further been compacted by vacuum hot pressing. The compacts are crystalline as evidenced by the peaks corresponding to bcc α-Fe, and the average grain size in the compacts was determined to be ≈30 nm by line broadening analysis. SEM/EDAX measurements on the powders and the compacts revealed a homogenous microstructure, with low porosity. TEM and electron diffraction were also performed on the compacts. The consolidated samples had a hardness of VHN 871 as compared to a hardness of VHN 800 for conventional, M50 steel. The samples had a high yield strength and modulus of elasticity.

Original language	English
Pages (from-to)	169-172
Number of pages	4
Journal	Nanostructured Materials
Volume	9
Issue number	1-8
DOIs	https://doi.org/10.1016/S0965-9773(97)00045-7
State	Published - 1997

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title = "M50 nanostructured steel - The chemical synthesis and characterization of powders and compacts",

abstract = "Three different chemical routes have been investigated for the synthesis of nanostructured M50 steel. One method involves the ultrasound decomposition of organometallic precursors, the second method is the thermal decomposition of these precursors and the third is the co-reduction of metal halides using a reducing agent. These powders have further been compacted by vacuum hot pressing. The compacts are crystalline as evidenced by the peaks corresponding to bcc α-Fe, and the average grain size in the compacts was determined to be ≈30 nm by line broadening analysis. SEM/EDAX measurements on the powders and the compacts revealed a homogenous microstructure, with low porosity. TEM and electron diffraction were also performed on the compacts. The consolidated samples had a hardness of VHN 871 as compared to a hardness of VHN 800 for conventional, M50 steel. The samples had a high yield strength and modulus of elasticity.",

author = "Gonsalves, {K. E.} and Rangarajan, {S. P.} and Law, {C. C.} and A. Garcia-Ruiz and Chow, {G. M.}",

note = "Funding Information: Funding under grant ONR N00014-94-0579 is gratefully acknowledged. GMC would like to thank the support of the Office of Naval Research. We also acknowledge Steve Schady and Prof. John Morral for measurement of the mechanical properties.",

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doi = "10.1016/S0965-9773(97)00045-7",

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T1 - M50 nanostructured steel - The chemical synthesis and characterization of powders and compacts

AU - Gonsalves, K. E.

AU - Rangarajan, S. P.

AU - Law, C. C.

AU - Garcia-Ruiz, A.

AU - Chow, G. M.

N1 - Funding Information: Funding under grant ONR N00014-94-0579 is gratefully acknowledged. GMC would like to thank the support of the Office of Naval Research. We also acknowledge Steve Schady and Prof. John Morral for measurement of the mechanical properties.

PY - 1997

Y1 - 1997

N2 - Three different chemical routes have been investigated for the synthesis of nanostructured M50 steel. One method involves the ultrasound decomposition of organometallic precursors, the second method is the thermal decomposition of these precursors and the third is the co-reduction of metal halides using a reducing agent. These powders have further been compacted by vacuum hot pressing. The compacts are crystalline as evidenced by the peaks corresponding to bcc α-Fe, and the average grain size in the compacts was determined to be ≈30 nm by line broadening analysis. SEM/EDAX measurements on the powders and the compacts revealed a homogenous microstructure, with low porosity. TEM and electron diffraction were also performed on the compacts. The consolidated samples had a hardness of VHN 871 as compared to a hardness of VHN 800 for conventional, M50 steel. The samples had a high yield strength and modulus of elasticity.

AB - Three different chemical routes have been investigated for the synthesis of nanostructured M50 steel. One method involves the ultrasound decomposition of organometallic precursors, the second method is the thermal decomposition of these precursors and the third is the co-reduction of metal halides using a reducing agent. These powders have further been compacted by vacuum hot pressing. The compacts are crystalline as evidenced by the peaks corresponding to bcc α-Fe, and the average grain size in the compacts was determined to be ≈30 nm by line broadening analysis. SEM/EDAX measurements on the powders and the compacts revealed a homogenous microstructure, with low porosity. TEM and electron diffraction were also performed on the compacts. The consolidated samples had a hardness of VHN 871 as compared to a hardness of VHN 800 for conventional, M50 steel. The samples had a high yield strength and modulus of elasticity.

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DO - 10.1016/S0965-9773(97)00045-7

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JO - Nanostructured Materials

JF - Nanostructured Materials

IS - 1-8

ER -

M50 nanostructured steel - The chemical synthesis and characterization of powders and compacts

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