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Cyclic plasticity and damage mechanisms of Ti-6Al-4V processed by electron beam melting

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posted on 2024-10-01, 08:37 authored by AK Syed, D Parfitt, D Wimpenny, E Muzangaza, B Chen
Cyclic deformation and damage mechanisms in electron-beam-melted Ti-6Al-4V are investigated. As-built samples exhibit a graded microstructure over the height of 120 mm, with samples from the top having larger α-laths and higher plastic strain. After HIPing, the α-lath width is greater, with reduced grain misorientation, and lower microstructural and property gradients. In both conditions, the observed cyclic softening is dominated by a monotonic reduction in the friction stress and an increase in grain misorientation, suggesting the lath structure progressively fragments into smaller grains. As-built samples show typically lower fatigue life due to crack initiation from gas pores and lack-of-fusion defects.

Funding

Cyclic Deformation and Damage Mechanisms in additive manufactured Ti-6Al-4V with Graded Microstructures

Engineering and Physical Sciences Research Council

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enabling Sixty Years creep-fatigue life of the NExt generation nuclear Reactors 'SYNERgy'

Engineering and Physical Sciences Research Council

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History

Citation

A.K. Syed, D. Parfitt, D. Wimpenny, E. Muzangaza, B. Chen, Cyclic plasticity and damage mechanisms of Ti-6Al-4V processed by electron beam melting, International Journal of Fatigue, Volume 160, 2022, 106883, ISSN 0142-1123, https://doi.org/10.1016/j.ijfatigue.2022.106883.

Author affiliation

School of Engineering, University of Leicester

Version

  • VoR (Version of Record)

Published in

INTERNATIONAL JOURNAL OF FATIGUE

Volume

160

Pagination

(12)

Publisher

ELSEVIER SCI LTD

issn

0142-1123

eissn

1879-3452

Acceptance date

2022-03-26

Copyright date

2022

Available date

2024-10-01

Language

English

Data Access Statement

The raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.

Rights Retention Statement

  • No