Investigations on the void coalescence and corrosion behaviour of titanium grade 4 sheets during single point incremental forming process

Purpose The purpose of this paper is to investigate the void coalescence and corrosion behaviour of titanium Grade 4 sheets during single point incremental forming (SPIF) process with various spindle rotational speeds. The development of corrosion pits in 3.5 (%) NaCl solution has also been studied...

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Bibliographic Details
Published in:Anti-corrosion methods and materials 2019-11, Vol.66 (6), p.861-867
Main Authors: Yoganjaneyulu, G, Phaneendra, Y, Ravikumar, V.V, Sathiya Narayanan, C
Format: Article
Language:English
Subjects:
Aluminum
Chemical elements
Coalescence
Coalescing
Composite materials
Corrosion
Corrosion rate
Corrosion resistance
Deformation
Formability
Forming limit diagrams
Forming techniques
Grain size
Ligaments
Metal forming
Morphology
Numerical controls
Plastic deformation
Precipitation hardening
Shear stress
Sheets
Sodium chloride
Strain hardening
Temperature
Titanium
Titanium alloys
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Summary:Purpose The purpose of this paper is to investigate the void coalescence and corrosion behaviour of titanium Grade 4 sheets during single point incremental forming (SPIF) process with various spindle rotational speeds. The development of corrosion pits in 3.5 (%) NaCl solution has also been studied during SPIF process. Design/methodology/approach In this current research work, the void coalescence analysis and corrosion behaviour of titanium Grade 4 specimens were studied. A potentio-dynamic polarization (PDP) study was conducted to investigate the corrosion behaviour of titanium Grade 4 processed samples with various spindle speeds in 3.5 (%) NaCl solution. The scanning electron microscope and transmission electron microscope analysis was carried out to study the fracture behaviour and corrosion morphology of processed samples. Findings The titanium Grade 4 sheets obtained better formability and corrosion resistance by increasing the CNC spindle rotational speeds. In fact that, the significant plastic deformation affects the corrosion rate with various spindle speeds were recorded. Originality/value The spindle rotational speeds and vertical step depths increases then the titanium Grade 4 sheets showed better formability, void coalescence and corrosion behaviour as the same is evidenced in forming limit diagram and PDP curves.
ISSN:0003-5599
1758-4221
DOI:10.1108/ACMM-01-2019-2074