Imperial College London
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DrEmilioMartinez-Paneda

Faculty of Engineering, Department of Civil and Environmental Engineering

Visiting Reader
 
 
 
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Contact

 

+44 (0)20 7594 8188e.martinez-paneda Website

 
 
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Location

 

249Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Díaz:2022:10.1016/j.tafmec.2022.103510,
author = {Díaz, A and Alegre, JM and Cuesta, II and Martínez-Pañeda, E and Zhang, Z},
doi = {10.1016/j.tafmec.2022.103510},
journal = {Theoretical and Applied Fracture Mechanics},
pages = {1--10},
title = {Notch fracture predictions using the Phase Field method for Ti-6Al-4V produced by Selective Laser Melting after different post-processing conditions},
url = {http://dx.doi.org/10.1016/j.tafmec.2022.103510},
volume = {121},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Ti-6Al-4V is a titanium alloy with excellent properties for lightweight applications and its production through Additive Manufacturing processes is attractive for different industrial sectors. In this work, the influence of mechanical properties on the notch fracture resistance of Ti-6Al-4V produced by Selective Laser Melting is numerically investigated. Literature data is used to inform material behaviour. The as-built brittle behaviour is compared to the enhanced ductile response after heat treatment (HT) and hot isostatic pressing (HIP) post-processes. A Phase Field framework is adopted to capture damage nucleation and propagation from two different notch geometries and a discussion on the influence of fracture energy and the characteristic length is carried out. In addition, the influence of oxygen uptake is analysed by reproducing non-inert atmospheres during HT and HIP, showing that oxygen shifts fracture to brittle failures due to the formation of an alpha case layer, especially for the V-notch geometry. Results show that a pure elastic behaviour can be assumed for the as-built SLM condition, whereas elastic-plastic phenomena must be modelled for specimens subjected to heat treatment or hot isostatic pressing. The present brittle Phase Field framework coupled with an elastic-plastic constitutive analysis is demonstrated to be a robust prediction tool for notch fracture after different post-processing routes.
AU  - Díaz,A
AU  - Alegre,JM
AU  - Cuesta,II
AU  - Martínez-Pañeda,E
AU  - Zhang,Z
DO  - 10.1016/j.tafmec.2022.103510
EP  - 10
PY  - 2022///
SN  - 0167-8442
SP  - 1
TI  - Notch fracture predictions using the Phase Field method for Ti-6Al-4V produced by Selective Laser Melting after different post-processing conditions
T2  - Theoretical and Applied Fracture Mechanics
UR  - http://dx.doi.org/10.1016/j.tafmec.2022.103510
UR  - https://www.sciencedirect.com/science/article/pii/S0167844222002555
UR  - http://hdl.handle.net/10044/1/99711
VL  - 121
ER  -
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