Microstructure and tribology of spark plasma sintered Fe-Cr-B metamorphic alloy powder

Ahmad A. Sorour; Holger W. Strauss; Richard R. Chromik; Mathieu Brochu

doi:10.1007/s11249-011-9845-z

Microstructure and tribology of spark plasma sintered Fe-Cr-B metamorphic alloy powder

Ahmad A. Sorour, Holger W. Strauss, Richard R. Chromik^*, Mathieu Brochu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

The spark plasma sintering (SPS) process was used to fabricate a bulk Fe-Cr-B alloy (known as Armacor M) from gas-atomized powders. The purpose of this work is to study the microstructure, hardness and tribology of this sintered bulk alloy. Post microstructure and mechanical characterizations were performed to investigate the effects of wear on the microstructure and mechanical properties. Microstructural analysis using X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) showed that SPS successfully produced a fully dense bulk material containing 67 vol.% Cr _1.65Fe _0.35B _0.96 particles dispersed in 33 vol.% solid solution matrix consisting of Fe, Cr and Si. Using nanoindentation, the hardness of the Cr _1.65Fe _0.35B _0.96 particles and the matrix was found to be 24 and 6 GPa, respectively. From microindentation, the bulk hardness of the sintered alloy was 9.7 GPa (991 HV). Dry sliding wear testing under mild conditions (i.e., initial Hertzian mean contact pressure of 280 MPa) was conducted against a stainless steel pin. The steady state coefficient of friction against Armacor M was about 0.82. The wear of Armacor M proceeded primarily by adhesive and mild oxidative wear. The wear volume for Armacor M was 80% less than that of carbon steel and its wear rate was 5.53 ×× 10 ^-6 mm ³ N ^-1 m ^-1.

Original language	English
Pages (from-to)	269-278
Number of pages	10
Journal	Tribology Letters
Volume	44
Issue number	2
DOIs	https://doi.org/10.1007/s11249-011-9845-z
State	Published - Nov 2011
Externally published	Yes

Bibliographical note

Funding Information:
Acknowledgments We gratefully acknowledge funding from the Canadian Foundation for Innovation. Thanks are also expressed to Liquidmetal Coatings for the supply of the Armacor M powder. We also acknowledge King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia for the scholarship awarded to A.A. Sorour.

Keywords

Adhesive wear
Borides
Ferrous alloys
Hardness
Oxidative wear
Unlubricated wear

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Surfaces and Interfaces
Surfaces, Coatings and Films

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10.1007/s11249-011-9845-z

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title = "Microstructure and tribology of spark plasma sintered Fe-Cr-B metamorphic alloy powder",

abstract = "The spark plasma sintering (SPS) process was used to fabricate a bulk Fe-Cr-B alloy (known as Armacor M) from gas-atomized powders. The purpose of this work is to study the microstructure, hardness and tribology of this sintered bulk alloy. Post microstructure and mechanical characterizations were performed to investigate the effects of wear on the microstructure and mechanical properties. Microstructural analysis using X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) showed that SPS successfully produced a fully dense bulk material containing 67 vol.% Cr 1.65Fe 0.35B 0.96 particles dispersed in 33 vol.% solid solution matrix consisting of Fe, Cr and Si. Using nanoindentation, the hardness of the Cr 1.65Fe 0.35B 0.96 particles and the matrix was found to be 24 and 6 GPa, respectively. From microindentation, the bulk hardness of the sintered alloy was 9.7 GPa (991 HV). Dry sliding wear testing under mild conditions (i.e., initial Hertzian mean contact pressure of 280 MPa) was conducted against a stainless steel pin. The steady state coefficient of friction against Armacor M was about 0.82. The wear of Armacor M proceeded primarily by adhesive and mild oxidative wear. The wear volume for Armacor M was 80% less than that of carbon steel and its wear rate was 5.53 ×× 10 -6 mm 3 N -1 m -1.",

keywords = "Adhesive wear, Borides, Ferrous alloys, Hardness, Oxidative wear, Unlubricated wear",

author = "Sorour, {Ahmad A.} and Strauss, {Holger W.} and Chromik, {Richard R.} and Mathieu Brochu",

note = "Funding Information: Acknowledgments We gratefully acknowledge funding from the Canadian Foundation for Innovation. Thanks are also expressed to Liquidmetal Coatings for the supply of the Armacor M powder. We also acknowledge King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia for the scholarship awarded to A.A. Sorour.",

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AU - Brochu, Mathieu

N1 - Funding Information: Acknowledgments We gratefully acknowledge funding from the Canadian Foundation for Innovation. Thanks are also expressed to Liquidmetal Coatings for the supply of the Armacor M powder. We also acknowledge King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia for the scholarship awarded to A.A. Sorour.

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N2 - The spark plasma sintering (SPS) process was used to fabricate a bulk Fe-Cr-B alloy (known as Armacor M) from gas-atomized powders. The purpose of this work is to study the microstructure, hardness and tribology of this sintered bulk alloy. Post microstructure and mechanical characterizations were performed to investigate the effects of wear on the microstructure and mechanical properties. Microstructural analysis using X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) showed that SPS successfully produced a fully dense bulk material containing 67 vol.% Cr 1.65Fe 0.35B 0.96 particles dispersed in 33 vol.% solid solution matrix consisting of Fe, Cr and Si. Using nanoindentation, the hardness of the Cr 1.65Fe 0.35B 0.96 particles and the matrix was found to be 24 and 6 GPa, respectively. From microindentation, the bulk hardness of the sintered alloy was 9.7 GPa (991 HV). Dry sliding wear testing under mild conditions (i.e., initial Hertzian mean contact pressure of 280 MPa) was conducted against a stainless steel pin. The steady state coefficient of friction against Armacor M was about 0.82. The wear of Armacor M proceeded primarily by adhesive and mild oxidative wear. The wear volume for Armacor M was 80% less than that of carbon steel and its wear rate was 5.53 ×× 10 -6 mm 3 N -1 m -1.

AB - The spark plasma sintering (SPS) process was used to fabricate a bulk Fe-Cr-B alloy (known as Armacor M) from gas-atomized powders. The purpose of this work is to study the microstructure, hardness and tribology of this sintered bulk alloy. Post microstructure and mechanical characterizations were performed to investigate the effects of wear on the microstructure and mechanical properties. Microstructural analysis using X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) showed that SPS successfully produced a fully dense bulk material containing 67 vol.% Cr 1.65Fe 0.35B 0.96 particles dispersed in 33 vol.% solid solution matrix consisting of Fe, Cr and Si. Using nanoindentation, the hardness of the Cr 1.65Fe 0.35B 0.96 particles and the matrix was found to be 24 and 6 GPa, respectively. From microindentation, the bulk hardness of the sintered alloy was 9.7 GPa (991 HV). Dry sliding wear testing under mild conditions (i.e., initial Hertzian mean contact pressure of 280 MPa) was conducted against a stainless steel pin. The steady state coefficient of friction against Armacor M was about 0.82. The wear of Armacor M proceeded primarily by adhesive and mild oxidative wear. The wear volume for Armacor M was 80% less than that of carbon steel and its wear rate was 5.53 ×× 10 -6 mm 3 N -1 m -1.

KW - Adhesive wear

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KW - Ferrous alloys

KW - Hardness

KW - Oxidative wear

KW - Unlubricated wear

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JF - Tribology Letters

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ER -

Microstructure and tribology of spark plasma sintered Fe-Cr-B metamorphic alloy powder

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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