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Microstructure and Impact Toughness of Flux-Cored Arc Welded SM570-TMC Steel at Low and High Heat Input
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Microstructure and Impact Toughness of Flux-Cored Arc Welded SM570-TMC Steel at Low and High Heat Input

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Abstract:

This work investigated microstructure and impact toughness of multi-pass flux-cored arc welded SM570-TMC steel. A comparison was made between weldments fabricated with average heat input of 0.9 kJ/mm and 1.4 kJ/mm, respectively. SM570 steel plate with 16 mm nominal thickness and 1.2 mm diameter of E81-Ni1 flux-cored wire were selected in this experiment. Multi-pass flux-cored arc welding (FCAW) was performed using carbon dioxide shielding gas. Then the weldments were observed using optical microscopy, scanning electron microscope (SEM) and electron probe micro analyzer (EPMA). The steel joint strength was measured via tensile test, and Charpy impact test was performed at three different test temperatures. The microstructure observation exhibited the base metal mainly consist of ferrite and pearlite features, while the weld metal contained the acicular ferrites, polygonal ferrites and M-A constituent at both different heat inputs. The impact toughness of base metal is superior than weld metals. The weld metals fabricated at average heat input of 0.9 kJ/mm have a higher low temperature impact toughness than using heat input of 1.4 kJ/mm. The acicular ferrites amount that significant reduced at the higher heat input may degrade the toughness at low temperature.

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Periodical:

Materials Science Forum (Volume 991)

Pages:

3-9

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.991.3

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Online since:

May 2020

Authors:

Herry Oktadinata, Winarto Winarto*, Eddy S. Siradj

Keywords:

Flux Cored Arc Welding, Heat Input, Impact Toughness, Microstructure, SM570-TMC

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© 2020 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] J. Hu, L.X. Du, H. Xie, J.J. Wang and C.R. Gao, Effect of welding heat input on microstructures and toughness in simulated CGHAZ of V-N high strength steel, Materials Science and Eng. A 577: 161-168, (2013).

DOI: 10.1016/j.msea.2013.04.044

Google Scholar

[2] J. Jiang, W. Bao, Z.Y. Peng, Y.B. Fang, J. Liu, and X.H. Dai, Experimental investigation on mechanical behaviors of TMCP high strength steel, Construction and Building Materials 200: 664-680, (2019).

DOI: 10.1016/j.conbuildmat.2018.12.130

Google Scholar

[3] Z. Wang, M. Shi, S. Tang, and G. Wang, Effect of heat input and M-A constituent on microstructure evolution and mechanical properties of the heat-affected zone in low carbon steel, Journal of Wuhan University of Technology-Mater. Sci. Ed. Vol. 32, No. 5, (2017).

DOI: 10.1007/s11595-017-1726-3

Google Scholar

[4] H. Oktadinata, Winarto and E.S. Siradj, Investigations on Impact Toughness and Microstructure Characteristics of Gas Metal Arc Welded HY-80 Steel Plate, Materials Science Forum Vol.964, pp.68-79, (2019).

DOI: 10.4028/www.scientific.net/msf.964.68

Google Scholar

[5] H.S. Shin, K.T. Park, C.H. Lee, K.H. Chang, and V.N.V. Do, Low-temperature impact toughness of structural steel welds with different welding processes, KSCE Journal of Civil Engineering 19 (5): 1431-1437, (2015).

DOI: 10.1007/s12205-015-0042-8

Google Scholar

[6] C.H. Lee, H.S. Shin, S.T. Kang, B.C. Joo, and K.T. Park, Evaluation of the failure mode transition in high strength TMCP steel weld by Charpy impact test, International Snow Science Workshop, (2010).

Google Scholar

[7] N.A. Setiyanto, H. Oktadinata, and Winarto, Effect of nickel on the microstructure, hardness and impact toughness of SM570-TMC weld metals, MATEC Web of Conf. 269:02007, (2019).

DOI: 10.1051/matecconf/201926902007

Google Scholar

[8] O. Popovic, R.P. Cvetkovic, L. Radovic, Z. Burzic and D. Arsic, The influence of heat input on the toughness and fracture mechanism of surface weld metal, Procedia Structural Integrity 13: 2216-2220, (2018).

DOI: 10.1016/j.prostr.2018.12.138

Google Scholar

[9] M. Amraei, A. Ahola, S. Afkhami, T. Bjork, A. Heidarpour and X.L. Zhao, Effect of heat input on the mechanical properties of butt-welded high and ultra-high-strength steels, Engineering Structures 198: 109460, (2019).

DOI: 10.1016/j.engstruct.2019.109460

Google Scholar

[10] P.D. Gosavi, K.K. Sarkar, S.K. Kunthe, V.R. Pawar and B. Basu, Microstructure and mechanical properties correlation of weld joints of a high strength naval grade steel, Procedia Structural Integrity 14: 304-313, (2019).

DOI: 10.1016/j.prostr.2019.05.038

Google Scholar

[11] L. Lan, X. Kong, Z. Chang, C. Qiu, and D. Zhao, Microstructure, composition, and impact toughness across the fusion line of high-strength bainitic steel weldments, Metallurgical and Materials Transactions A, Vol.48A: 4140-4153, (2017).

DOI: 10.1007/s11661-017-4165-z

Google Scholar

[12] X. Yang, X. Di, X. Liu, D. Wang and C. Li, Effects of heat input on microstructure and fracture toughness of simulated coarse-grained heat-affected zone for HSLA steels, Materials Characterization 155: 109818, (2019).

DOI: 10.1016/j.matchar.2019.109818

Google Scholar