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Impact of grain orientation and phase on Volta potential differences in an additively manufactured titanium alloy
- Source :
- AIP advances, AIP Advances, Vol 11, Iss 2, Pp 025219-025219-6 (2021)
- Publication Year :
- 2021
-
Abstract
- This work introduces a method for co-localized multi-modal imaging of sub-μm features in an additively manufactured (AM) titanium alloy. Ti-6Al-4V parts manufactured by electron beam melting powder bed fusion were subjected to hot isostatic pressing to seal internal porosity and machined to remove contour–hatch interfaces. Electron microscopy and atomic force microscopy-based techniques (electron backscatter diffraction and scanning Kelvin probe force microscopy) were used to measure and categorize the effects of crystallographic texture, misorientation, and phase content on the relative differences in the Volta potential of α-Ti and β-Ti phases. Given the tunability of additive manufacturing processes, recommendations for texture and phase control are discussed. In particular, our findings indicate that the potential for micro-galvanic corrosion initiation can be regulated in AM Ti-6Al-4V parts by minimizing both the total area of {111} prior-β grains and the number of contact points between {111} β grains and α laths that originate from {001} prior-β grains.
- Subjects :
- 010302 applied physics
Kelvin probe force microscope
Materials science
Misorientation
General Physics and Astronomy
Titanium alloy
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
lcsh:QC1-999
Article
Hot isostatic pressing
Phase (matter)
0103 physical sciences
Microscopy
Texture (crystalline)
Composite material
0210 nano-technology
lcsh:Physics
Electron backscatter diffraction
Subjects
Details
- Language :
- English
- ISSN :
- 21583226
- Volume :
- 11
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- AIP advances
- Accession number :
- edsair.doi.dedup.....92ce18195972e62026c0f0c4c30e150c