The effect of external magnetic flux field in the QTS weldment on the change of fatigue crack propagation behaviors

Authors

DOI:

https://doi.org/10.15587/1729-4061.2018.122919

Keywords:

crack propagation rate, crack resistance, external magnetic flux, martempering, martensite, QTS, weldability

Abstract

This investigation discusses fatigue crack propagation behaviors on the welded joint of Hot Rolled Quench Tempered Steel (QTS) in which during welding process the fusion zone of the joint was subjected to magnetic flux field. The QTS weldability is not really excellent due to the change of microstructure into tempered martensite, and the possibility of microcrack defect on the welding area is still high. The purpose of the investigation is to know the effect of External Magnetic Flux (EMF) field during welding process on fatigue crack propagation behaviors. The external magnetic flux is applied transversely from two sides of the workpiece using a DC powered solenoid of 0, 3, 6, 9 and 15 Amperes. The effect of EMF is more sensitive to decrease the tensile strength and the fatigue crack propagation rate of the weld area. The result shows that the electromagnetic force on the weld pool increases. It causes the liquid metal circulation rate to increase and welding defects to decrease. This indicates that the liquid metal and filler metal are easily mixed, the release of gas from liquid metal to surface before solidification easily happens. The finding shows that the effect of EMF is more efficient.

Author Biographies

Sugiarto Sugiarto, Brawijaya University Malang Jalan. Mayjend Haryono, 167, Malang, Indonesia, 65145

Associate Professor

Department of Mechanical Engineering

Rudy Soenoko, Brawijaya University Malang Jalan. Mayjend Haryono, 167, Malang, Indonesia, 65145

Professor

Department of Mechanical Engineering

Anindito Purnowidodo, Brawijaya University Malang Jalan. Mayjend Haryono, 167, Malang, Indonesia, 65145

Associate Professor

Department of Mechanical Engineering

Yudy Surya Irawan, Brawijaya University Malang Jalan. Mayjend Haryono, 167, Malang, Indonesia, 65145

Doctorate

Department of Mechanical Engineering

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Published

2018-04-19

How to Cite

Sugiarto, S., Soenoko, R., Purnowidodo, A., & Irawan, Y. S. (2018). The effect of external magnetic flux field in the QTS weldment on the change of fatigue crack propagation behaviors. Eastern-European Journal of Enterprise Technologies, 2(12 (92), 4–11. https://doi.org/10.15587/1729-4061.2018.122919

Issue

Vol. 2 No. 12 (92) (2018): Materials Science

Section

Materials Science

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