Defect-healing of a laser-powder bed fusion Ti6Al4V alloy via electro-assisted micro-forging

L. X. Meng; H. J. Yang; S. G. Wang; H. B. Ji; X. H. Shao; Z. J. Zhang; D. C. Ren; X. Zhang; J. B. Yang; X. H. An; Y. T. Pei; J. Th M. De Hosson; R. Yang; Z. J. Zhang

doi:10.1016/j.matchar.2023.113298

Defect-healing of a laser-powder bed fusion Ti6Al4V alloy via electro-assisted micro-forging

L. X. Meng, H. J. Yang^*, S. G. Wang, H. B. Ji, X. H. Shao, Z. J. Zhang, D. C. Ren, X. Zhang, J. B. Yang, X. H. An, Y. T. Pei, J. Th M. De Hosson^*, R. Yang, Z. J. Zhang^*

^*Corresponding author voor dit werk

Advanced Production Engineering

Onderzoeksoutput: Article › Academic › peer review

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In recent years, the concept of hybrid manufacturing has been proposed to heal the defects in additive manufactured (AM) materials, taking advantage of both the AM technique and additional secondary processes such as hot forging. However, the healing mechanism of defects, as well as the relationship between defects elimination and microstructure evolution need to be further studied. In this work, we designed laser-powder bed fusion (L-PBF) Ti6Al4V samples with high initial porosity, making it easier to trace the pores during the quasi in-situ X-ray tomography (XRT) observation. The samples were conducted hot forging by Gleeble-3800 system, which is named as electro-assisted micro-forging (EAMF) treatment, considering the characteristic of this process is to directly electrify the specimen to generate Joule heat. The results show that the porosity was effectively reduced by combining effects of electric current, heat energy and compressive stress during EAMF. Simultaneous enhancement of strength and ductility was realized. The defect-healing mechanism that comprising various stages was comprehensively disclosed. The competitive relationship between defect-healing and microstructure coarsening was revealed, which has a guiding effect on the subsequent optimization of process parameters.

Originele taal-2	English
Artikelnummer	113298
Tijdschrift	Materials Characterization
Volume	205
DOI's	https://doi.org/10.1016/j.matchar.2023.113298
Status	Published - nov.-2023

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Meng, L. X., Yang, H. J., Wang, S. G., Ji, H. B., Shao, X. H., Zhang, Z. J., Ren, D. C., Zhang, X., Yang, J. B., An, X. H., Pei, Y. T., De Hosson, J. T. M., Yang, R., & Zhang, Z. J. (2023). Defect-healing of a laser-powder bed fusion Ti6Al4V alloy via electro-assisted micro-forging. Materials Characterization, 205, Artikel 113298. https://doi.org/10.1016/j.matchar.2023.113298

@article{ad4861c5dae8401896485cef44b56e74,

title = "Defect-healing of a laser-powder bed fusion Ti6Al4V alloy via electro-assisted micro-forging",

abstract = "In recent years, the concept of hybrid manufacturing has been proposed to heal the defects in additive manufactured (AM) materials, taking advantage of both the AM technique and additional secondary processes such as hot forging. However, the healing mechanism of defects, as well as the relationship between defects elimination and microstructure evolution need to be further studied. In this work, we designed laser-powder bed fusion (L-PBF) Ti6Al4V samples with high initial porosity, making it easier to trace the pores during the quasi in-situ X-ray tomography (XRT) observation. The samples were conducted hot forging by Gleeble-3800 system, which is named as electro-assisted micro-forging (EAMF) treatment, considering the characteristic of this process is to directly electrify the specimen to generate Joule heat. The results show that the porosity was effectively reduced by combining effects of electric current, heat energy and compressive stress during EAMF. Simultaneous enhancement of strength and ductility was realized. The defect-healing mechanism that comprising various stages was comprehensively disclosed. The competitive relationship between defect-healing and microstructure coarsening was revealed, which has a guiding effect on the subsequent optimization of process parameters.",

keywords = "Defect-healing, Electro-assisted micro-forging, Laser-powder bed fusion, Mechanical properties, Ti6Al4V",

author = "Meng, {L. X.} and Yang, {H. J.} and Wang, {S. G.} and Ji, {H. B.} and Shao, {X. H.} and Zhang, {Z. J.} and Ren, {D. C.} and X. Zhang and Yang, {J. B.} and An, {X. H.} and Pei, {Y. T.} and {De Hosson}, {J. Th M.} and R. Yang and Zhang, {Z. J.}",

note = "Funding Information: Financial support from the National Natural Science Foundation of China (Grant No. 51975552 and Grant No. 51230002 ), the Natural Science Foundation of Liaoning Province (Grant No. 2020-MS-007 ), the CAS Interdisciplinary Innovation Team (Grant No. JCTD-2020-10 ) and the KC Wong Education Foundation ( GJTD-2020-09 ) are gratefully acknowledged. X.H. An acknowledges support from the Australian Research Council under DP230101228 and from The University of Sydney under the Robinson Fellowship Scheme. Publisher Copyright: {\textcopyright} 2023",

year = "2023",

month = nov,

doi = "10.1016/j.matchar.2023.113298",

language = "English",

volume = "205",

journal = "Materials Characterization",

issn = "1044-5803",

publisher = "Elsevier",

}

TY - JOUR

T1 - Defect-healing of a laser-powder bed fusion Ti6Al4V alloy via electro-assisted micro-forging

AU - Meng, L. X.

AU - Yang, H. J.

AU - Wang, S. G.

AU - Ji, H. B.

AU - Shao, X. H.

AU - Zhang, Z. J.

AU - Ren, D. C.

AU - Zhang, X.

AU - Yang, J. B.

AU - An, X. H.

AU - Pei, Y. T.

AU - De Hosson, J. Th M.

AU - Yang, R.

AU - Zhang, Z. J.

N1 - Funding Information: Financial support from the National Natural Science Foundation of China (Grant No. 51975552 and Grant No. 51230002 ), the Natural Science Foundation of Liaoning Province (Grant No. 2020-MS-007 ), the CAS Interdisciplinary Innovation Team (Grant No. JCTD-2020-10 ) and the KC Wong Education Foundation ( GJTD-2020-09 ) are gratefully acknowledged. X.H. An acknowledges support from the Australian Research Council under DP230101228 and from The University of Sydney under the Robinson Fellowship Scheme. Publisher Copyright: © 2023

PY - 2023/11

Y1 - 2023/11

N2 - In recent years, the concept of hybrid manufacturing has been proposed to heal the defects in additive manufactured (AM) materials, taking advantage of both the AM technique and additional secondary processes such as hot forging. However, the healing mechanism of defects, as well as the relationship between defects elimination and microstructure evolution need to be further studied. In this work, we designed laser-powder bed fusion (L-PBF) Ti6Al4V samples with high initial porosity, making it easier to trace the pores during the quasi in-situ X-ray tomography (XRT) observation. The samples were conducted hot forging by Gleeble-3800 system, which is named as electro-assisted micro-forging (EAMF) treatment, considering the characteristic of this process is to directly electrify the specimen to generate Joule heat. The results show that the porosity was effectively reduced by combining effects of electric current, heat energy and compressive stress during EAMF. Simultaneous enhancement of strength and ductility was realized. The defect-healing mechanism that comprising various stages was comprehensively disclosed. The competitive relationship between defect-healing and microstructure coarsening was revealed, which has a guiding effect on the subsequent optimization of process parameters.

AB - In recent years, the concept of hybrid manufacturing has been proposed to heal the defects in additive manufactured (AM) materials, taking advantage of both the AM technique and additional secondary processes such as hot forging. However, the healing mechanism of defects, as well as the relationship between defects elimination and microstructure evolution need to be further studied. In this work, we designed laser-powder bed fusion (L-PBF) Ti6Al4V samples with high initial porosity, making it easier to trace the pores during the quasi in-situ X-ray tomography (XRT) observation. The samples were conducted hot forging by Gleeble-3800 system, which is named as electro-assisted micro-forging (EAMF) treatment, considering the characteristic of this process is to directly electrify the specimen to generate Joule heat. The results show that the porosity was effectively reduced by combining effects of electric current, heat energy and compressive stress during EAMF. Simultaneous enhancement of strength and ductility was realized. The defect-healing mechanism that comprising various stages was comprehensively disclosed. The competitive relationship between defect-healing and microstructure coarsening was revealed, which has a guiding effect on the subsequent optimization of process parameters.

KW - Defect-healing

KW - Electro-assisted micro-forging

KW - Laser-powder bed fusion

KW - Mechanical properties

KW - Ti6Al4V

UR - http://www.scopus.com/inward/record.url?scp=85172316878&partnerID=8YFLogxK

U2 - 10.1016/j.matchar.2023.113298

DO - 10.1016/j.matchar.2023.113298

M3 - Article

AN - SCOPUS:85172316878

SN - 1044-5803

VL - 205

JO - Materials Characterization

JF - Materials Characterization

M1 - 113298

ER -

Defect-healing of a laser-powder bed fusion Ti6Al4V alloy via electro-assisted micro-forging

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