Dependence of fracture patterns in spark plasma sintered irregular shaped Ti6Al4V powders on densification.
Adegbenjo, Adewale Oladapo Nsiah-Baafi, Elsie Olubambi, Peter Apata Potgieter, Johannes Herman Shongwe, Mxolisi Brendon Ramakokovhua, Mercy
Adegbenjo, Adewale Oladapo
Nsiah-Baafi, Elsie
Olubambi, Peter Apata
Potgieter, Johannes Herman
Shongwe, Mxolisi Brendon
Ramakokovhua, Mercy
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Abstract
The effect of densification on the fracture behaviour of spark plasma sintered irregular and angular shaped prealloyed Ti6Al4V powders was investigated in this study. Sintering was performed in vacuum at constant heating rate, applied pressure and holding time of 100̊C/min, 50 MPa and 5 min respectively with sintering temperature varied between 650 – 850̊C. Density measurements on sintered samples were according to Archimedes’ principle while microstructural evolution and fractographic studies were carried out using a High Resolution Scanning Electron Microscope (HRSEM). Phase identification in sintered samples was achieved by X-ray diffraction (XRD) and Energy Dispersive Spectroscopy (EDS) respectively. Results showed that fracture pattern changed from intergranular to transgranular as densification improved from lower to higher sintering temperature.
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International conference on sustainable materials processing and manufacturing, SMPM 2017, 23-25 January 2017, Kruger National Park.
Date
2017-01-23
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Elsevier
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Keywords
Ti6Al4V alloy, Sintering, Densification, Fracture, Characterization