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Investigation of strengthening mechanism of commercially pure titanium joints fabricated by autogenously laser beam welding and laser-MIG hybrid welding processes

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Investigation of strengthening mechanism of commercially pure titanium joints fabricated by autogenously laser beam welding and laser-MIG hybrid welding processes. / Li, Ruifeng; Zhang, Feng; Sun, Tianzhu et al.
In: International Journal of Advanced Manufacturing Technology, Vol. 101, No. 1-4, 01.03.2019, p. 377-389.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Li, R, Zhang, F, Sun, T, Liu, B, Chen, S & Tian, Y 2019, 'Investigation of strengthening mechanism of commercially pure titanium joints fabricated by autogenously laser beam welding and laser-MIG hybrid welding processes', International Journal of Advanced Manufacturing Technology, vol. 101, no. 1-4, pp. 377-389. https://doi.org/10.1007/s00170-018-2922-9

APA

Vancouver

Li R, Zhang F, Sun T, Liu B, Chen S, Tian Y. Investigation of strengthening mechanism of commercially pure titanium joints fabricated by autogenously laser beam welding and laser-MIG hybrid welding processes. International Journal of Advanced Manufacturing Technology. 2019 Mar 1;101(1-4):377-389. Epub 2018 Nov 1. doi: 10.1007/s00170-018-2922-9

Author

Li, Ruifeng ; Zhang, Feng ; Sun, Tianzhu et al. / Investigation of strengthening mechanism of commercially pure titanium joints fabricated by autogenously laser beam welding and laser-MIG hybrid welding processes. In: International Journal of Advanced Manufacturing Technology. 2019 ; Vol. 101, No. 1-4. pp. 377-389.

Bibtex

@article{e95ade1d00184a26a1cf1d0ce438f136,
title = "Investigation of strengthening mechanism of commercially pure titanium joints fabricated by autogenously laser beam welding and laser-MIG hybrid welding processes",
abstract = "In this study, in order to achieve a better understanding of the strengthening mechanism in the commercially pure (CP) Ti welds, autogenously laser beam and laser-MIG hybrid welding of 4.2 mm thick CP-Ti plates were performed and the correlation between microstructure, texture distribution and the mechanical properties were systematically investigated. Microstructural coarsening and increase in microhardness were observed in the HAZ and WZ. The tensile test results suggested the base metal was the weak point of the joint for both welding conditions. The EBSD observations confirmed that a large number of { 10 1 ¯ 2 } and { 11 2 ¯ 2 } twin grains occurred in the HAZ and WZ of both welded joints, while a higher concentration of these twin grains were found in the laser-MIG hybrid joints. High concentration of the twin grain boundaries can act as barrier to stop dislocation slip during deformation and therefore contribute to the strengthening of the welds. The existence of very small twin grains and acicular α phase in HAZ and WZ would equivalently reduce the averaged grain size and therefore induce an increase in strength based on Hall-Petch{\textquoteright}s law. In addition, the averaged Schmid factor of BM is higher than that of the WZ and HAZ in both welding joints suggesting that the grain boundary sliding will take place preferably in BM during deformation so that the necking and fracture occurred in base metal during tensile tests of both welding joint specimens.",
keywords = "Laser beam welding, Laser-MIG hybrid welding, Commercially pure titanium Laser-MIG hybrid welding Commercially pure titanium Strengthening mechanism Microstructure Texture Mechanical property, Strengthening mechanism, Microstructure, Texture, Mechanical property",
author = "Ruifeng Li and Feng Zhang and Tianzhu Sun and Bin Liu and Shujin Chen and Yingtao Tian",
year = "2019",
month = mar,
day = "1",
doi = "10.1007/s00170-018-2922-9",
language = "English",
volume = "101",
pages = "377--389",
journal = "International Journal of Advanced Manufacturing Technology",
issn = "1433-3015",
publisher = "Springer London",
number = "1-4",

}

RIS

TY - JOUR

T1 - Investigation of strengthening mechanism of commercially pure titanium joints fabricated by autogenously laser beam welding and laser-MIG hybrid welding processes

AU - Li, Ruifeng

AU - Zhang, Feng

AU - Sun, Tianzhu

AU - Liu, Bin

AU - Chen, Shujin

AU - Tian, Yingtao

PY - 2019/3/1

Y1 - 2019/3/1

N2 - In this study, in order to achieve a better understanding of the strengthening mechanism in the commercially pure (CP) Ti welds, autogenously laser beam and laser-MIG hybrid welding of 4.2 mm thick CP-Ti plates were performed and the correlation between microstructure, texture distribution and the mechanical properties were systematically investigated. Microstructural coarsening and increase in microhardness were observed in the HAZ and WZ. The tensile test results suggested the base metal was the weak point of the joint for both welding conditions. The EBSD observations confirmed that a large number of { 10 1 ¯ 2 } and { 11 2 ¯ 2 } twin grains occurred in the HAZ and WZ of both welded joints, while a higher concentration of these twin grains were found in the laser-MIG hybrid joints. High concentration of the twin grain boundaries can act as barrier to stop dislocation slip during deformation and therefore contribute to the strengthening of the welds. The existence of very small twin grains and acicular α phase in HAZ and WZ would equivalently reduce the averaged grain size and therefore induce an increase in strength based on Hall-Petch’s law. In addition, the averaged Schmid factor of BM is higher than that of the WZ and HAZ in both welding joints suggesting that the grain boundary sliding will take place preferably in BM during deformation so that the necking and fracture occurred in base metal during tensile tests of both welding joint specimens.

AB - In this study, in order to achieve a better understanding of the strengthening mechanism in the commercially pure (CP) Ti welds, autogenously laser beam and laser-MIG hybrid welding of 4.2 mm thick CP-Ti plates were performed and the correlation between microstructure, texture distribution and the mechanical properties were systematically investigated. Microstructural coarsening and increase in microhardness were observed in the HAZ and WZ. The tensile test results suggested the base metal was the weak point of the joint for both welding conditions. The EBSD observations confirmed that a large number of { 10 1 ¯ 2 } and { 11 2 ¯ 2 } twin grains occurred in the HAZ and WZ of both welded joints, while a higher concentration of these twin grains were found in the laser-MIG hybrid joints. High concentration of the twin grain boundaries can act as barrier to stop dislocation slip during deformation and therefore contribute to the strengthening of the welds. The existence of very small twin grains and acicular α phase in HAZ and WZ would equivalently reduce the averaged grain size and therefore induce an increase in strength based on Hall-Petch’s law. In addition, the averaged Schmid factor of BM is higher than that of the WZ and HAZ in both welding joints suggesting that the grain boundary sliding will take place preferably in BM during deformation so that the necking and fracture occurred in base metal during tensile tests of both welding joint specimens.

KW - Laser beam welding

KW - Laser-MIG hybrid welding

KW - Commercially pure titanium Laser-MIG hybrid welding Commercially pure titanium Strengthening mechanism Microstructure Texture Mechanical property

KW - Strengthening mechanism

KW - Microstructure

KW - Texture

KW - Mechanical property

U2 - 10.1007/s00170-018-2922-9

DO - 10.1007/s00170-018-2922-9

M3 - Journal article

VL - 101

SP - 377

EP - 389

JO - International Journal of Advanced Manufacturing Technology

JF - International Journal of Advanced Manufacturing Technology

SN - 1433-3015

IS - 1-4

ER -