# Investigating synergistic effects of process-induced defects and α phase substructures on the mechanical response of additively manufactured Ti-6Al-4V alloy via an integrated numerical framework

https://mdr.nims.go.jp/datasets/87eddd48-d42e-4056-a873-baf82c9e04f8

## File

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## Id

87eddd48-d42e-4056-a873-baf82c9e04f8

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-06-11T03:51:46.030420Z

## Updated at

2026-06-11T06:16:24.727111Z

## Published at

2026-06-11T07:27:49.275883Z

## Doi



## First published url

https://doi.org/10.1016/j.msea.2026.150551

## Date published

2026-06-05

## Recorded date published

2026-9

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Investigating synergistic effects of process-induced defects and α phase
    substructures on the mechanical response of additively manufactured Ti-6Al-4V
    alloy via an integrated numerical framework
  title_type: original
  lang: en

## Description

- description: Laser powder bed fusion (LPBF)-fabricated Ti-6Al-4V alloys are characterized
    by complex α-lath substructures and inherent process-induced defects. While numerical
    investigations are prevalent, conventional models often oversimplify microstructural
    morphologies and defects, leading to deviations in predicting failure mechanisms.
    In this study, a novel approach integrating cellular automaton (CA) with an algorithm-based
    structure generation method is proposed to address these limitations. In this
    framework, the CA technique is first employed to simulate the growth of prior-β
    columnar grains. Subsequently, an ellipse-fitting method is developed to construct
    the α-lath substructure, where the β-to-α phase transformation is achieved based
    on the Burgers orientation relationship (BOR). The Monte Carlo method is utilized
    to construct an irregular defect based on experimental characteristics. Through
    a comparative study between observations and crystal plasticity finite element
    (CPFE) simulations, the synergistic roles of the α-lath substructure and defects
    on the resulting tensile responses are evaluated. It is found that basal and pyramidal
    〈a〉 slip systems might be responsible for the crack initiation from the defect
    tips. Neglecting α-lath substructure results in a stress distribution overly dependent
    on prior-β grain boundaries and a marked underestimation of local stress/strain
    concentrations. The presence of defects is harmful to structural integrity and
    facilitate strain localization between defects, thereby accelerating the onset
    of localized failure and resulting in a zigzag-shaped fracture surface. The proposed
    microstructure construction strategy addresses the inherent shortcomings of traditional
    modeling methods and provides a robust tool for evaluating the mechanical behavior
    of additively manufactured metallic alloys.
  description_type: abstract
  lang: und

## Creator

- name: Hanqing Liu
  role: author
  orcid: https://orcid.org/0000-0003-4768-4326
- name: Fabien Briffod
  role: author
  orcid: https://orcid.org/0000-0002-3635-4885
- name: Takayuki Shiraiwa
  role: author
  orcid: https://orcid.org/0000-0002-0999-0798

## Contact agent



## Publisher

organization: Elsevier BV
ror: https://ror.org/

## Managing organization



## Keyword

- subject: Ti-6Al-4V
  schema: not_defined
- subject: Additive manufacturing
  schema: not_defined
- subject: Defect
  schema: not_defined
- subject: α-phase substructure
  schema: not_defined
- subject: Crystal plasticity finite element method
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: 'Materials Science and Engineering: A'
  issn: '09215093'
  volume: '971'
  article_number: '150551'

## Conference



## Related item



## Funding

- funder_name: The Amada Foundation
- funder_name: Japan Science and Technology Agency

## Instrument



## Instrument operator



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## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



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## Process for specimen treatment



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## Fileset

- id: c5b2fef5-41dc-4007-afab-5215a461e60e
  filename: 1-s2.0-S0921509326008312-main (1).pdf
  content_type: application/pdf
  size: 22229448
  md5: 4c8c8cd64f90a200713e15bda730d635

## Thumbnail

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filename: 1-s2.0-S0921509326008312-main (1).pdf