The effect of processing parameters on rapid-heating β recrystallization in inter-pass deformed Ti-6Al-4V wire-arc additive manufacturing

Simple item page
dc.contributor.authorDavis, Alec E.
dc.contributor.authorKennedy, Jacob R.
dc.contributor.authorDing, Jialuo
dc.contributor.authorPrangnell, Phil B.
dc.date.accessioned2020-08-12T16:15:27Z
dc.date.available2020-08-12T16:15:27Z
dc.date.issued2020-03-28
dc.description.abstractRelatively low levels of inter-pass deformation have been found to be very effective in refining the coarse columnar grain structures normally seen in Ti-6Al-4V components, built using wire-fed high-deposition-rate additive manufacturing processes. The most important process parameters that control the level of β recrystallization – the final grain size and micro-texture – were systematically investigated by simulating the deformation and high heating rate conditions in controlled samples, to develop the process knowledge required to optimise inter-pass deformation and obtain predictable grain sizes. Overall, it was found that the level of β-grain refinement achieved by inter-pass deformation was surprisingly insensitive to the ranges of deformation temperatures, deformation speeds, and changes to the as-deposited α + β microstructure, expected within the WAAM process window, provided a minimum plastic strain of only 14% was achieved in each added layer. Conversely, the final component grain size was shown to be strongly affected by rapid grain growth on re-heating above the β transus. The texture results obtained were consistent with previous work which suggested that, with fine AM transformation microstructures, new β-grain orientations may be produced during the α → β transformation from the development of twinning faults, induced by the prior deformation and rapid heating. In contrast, greatly increasing the starting α lamellar spacing – to be more similar to that found in a wrought material – greatly reduced the level of recrystallization and also appeared to change the recrystallization mechanism to favour new β orientations produced largely by local lattice rotation.en_UK
dc.identifier.citationDavis AE, Kennedy JR, Ding J, Prangnell PB. (2020) The effect of processing parameters on rapid-heating β recrystallization in inter-pass deformed Ti-6Al-4V wire-arc additive manufacturing. Materials Characterization, Volume 163, May 2020, Article number 110298en_UK
dc.identifier.issn1044-5803
dc.identifier.urihttps://doi.org/10.1016/j.matchar.2020.110298
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/15677
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectDeformationen_UK
dc.subjectTextureen_UK
dc.subjectRecrystallizationen_UK
dc.subjectGrain sizeen_UK
dc.subjectTitaniumen_UK
dc.subjectAdditive manufacturingen_UK
dc.titleThe effect of processing parameters on rapid-heating β recrystallization in inter-pass deformed Ti-6Al-4V wire-arc additive manufacturingen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Effect_of_ processing_parameters_on_rapid-heating_βrecrystallization-2020.pdf
Size:
13.14 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SATM)