Structure-property correlations of W-Ni-Fe-Mo heavy alloys consolidated using spark plasma sintering

A. Muthuchamy; Digvijay Yadev; Dinesh K. Agrawal; Raja Annamalai

doi:10.1088/2053-1591/aae349

Structure-property correlations of W-Ni-Fe-Mo heavy alloys consolidated using spark plasma sintering

A. Muthuchamy, Digvijay Yadev, Dinesh K. Agrawal, Raja Annamalai

Materials Research Institute (MRI)

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

6 Scopus citations

Abstract

W-Ni-Fe-Mo powders were mixed and sintered at 1100 °C and 50 MPa pressure, using spark plasma sintering method. The sintering parameters were optimized for 90W-7Ni-3Fe alloy and the effect of Mo addition on the final mechanical properties of the alloy (xW-7Ni-3Fe-yMo) was studied in detail. Addition of molybdenum has resulted in greater sinterability of xW-7Ni-3Fe-yMo alloys. The mechanical properties were found to be dependent on the grain size of tungsten and the homogeneity of the microstructure. It was observed from the results that, 74W-7Ni-3Fe-16Mo alloy exhibits highest strength (1150 MPa) and highest sintered density (92.65%) as compared to the other xW-7Ni-3Fe-yMo alloys under investigation. The tensile fracture surface microstructure is characterized as tungsten-tungsten inter-granular separation, tungsten trans-granular cleavage, matrix ductile rupture and local matrix rupture on the separated tungsten-tungsten interfaces.

Original language	English (US)
Article number	026545
Journal	Materials Research Express
Volume	6
Issue number	2
DOIs	https://doi.org/10.1088/2053-1591/aae349
State	Published - Feb 2019

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Polymers and Plastics
Metals and Alloys

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10.1088/2053-1591/aae349

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title = "Structure-property correlations of W-Ni-Fe-Mo heavy alloys consolidated using spark plasma sintering",

abstract = "W-Ni-Fe-Mo powders were mixed and sintered at 1100 °C and 50 MPa pressure, using spark plasma sintering method. The sintering parameters were optimized for 90W-7Ni-3Fe alloy and the effect of Mo addition on the final mechanical properties of the alloy (xW-7Ni-3Fe-yMo) was studied in detail. Addition of molybdenum has resulted in greater sinterability of xW-7Ni-3Fe-yMo alloys. The mechanical properties were found to be dependent on the grain size of tungsten and the homogeneity of the microstructure. It was observed from the results that, 74W-7Ni-3Fe-16Mo alloy exhibits highest strength (1150 MPa) and highest sintered density (92.65%) as compared to the other xW-7Ni-3Fe-yMo alloys under investigation. The tensile fracture surface microstructure is characterized as tungsten-tungsten inter-granular separation, tungsten trans-granular cleavage, matrix ductile rupture and local matrix rupture on the separated tungsten-tungsten interfaces.",

author = "A. Muthuchamy and Digvijay Yadev and Agrawal, {Dinesh K.} and Raja Annamalai",

note = "Publisher Copyright: {\textcopyright} 2018 IOP Publishing Ltd.",

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doi = "10.1088/2053-1591/aae349",

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AU - Muthuchamy, A.

AU - Yadev, Digvijay

AU - Agrawal, Dinesh K.

AU - Annamalai, Raja

PY - 2019/2

Y1 - 2019/2

N2 - W-Ni-Fe-Mo powders were mixed and sintered at 1100 °C and 50 MPa pressure, using spark plasma sintering method. The sintering parameters were optimized for 90W-7Ni-3Fe alloy and the effect of Mo addition on the final mechanical properties of the alloy (xW-7Ni-3Fe-yMo) was studied in detail. Addition of molybdenum has resulted in greater sinterability of xW-7Ni-3Fe-yMo alloys. The mechanical properties were found to be dependent on the grain size of tungsten and the homogeneity of the microstructure. It was observed from the results that, 74W-7Ni-3Fe-16Mo alloy exhibits highest strength (1150 MPa) and highest sintered density (92.65%) as compared to the other xW-7Ni-3Fe-yMo alloys under investigation. The tensile fracture surface microstructure is characterized as tungsten-tungsten inter-granular separation, tungsten trans-granular cleavage, matrix ductile rupture and local matrix rupture on the separated tungsten-tungsten interfaces.

AB - W-Ni-Fe-Mo powders were mixed and sintered at 1100 °C and 50 MPa pressure, using spark plasma sintering method. The sintering parameters were optimized for 90W-7Ni-3Fe alloy and the effect of Mo addition on the final mechanical properties of the alloy (xW-7Ni-3Fe-yMo) was studied in detail. Addition of molybdenum has resulted in greater sinterability of xW-7Ni-3Fe-yMo alloys. The mechanical properties were found to be dependent on the grain size of tungsten and the homogeneity of the microstructure. It was observed from the results that, 74W-7Ni-3Fe-16Mo alloy exhibits highest strength (1150 MPa) and highest sintered density (92.65%) as compared to the other xW-7Ni-3Fe-yMo alloys under investigation. The tensile fracture surface microstructure is characterized as tungsten-tungsten inter-granular separation, tungsten trans-granular cleavage, matrix ductile rupture and local matrix rupture on the separated tungsten-tungsten interfaces.

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Structure-property correlations of W-Ni-Fe-Mo heavy alloys consolidated using spark plasma sintering

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