Virtual manufacturing for prediction of Martensite Formation and Hardness Value induced by Laser Welding Process using Subroutine Algorithm in MSC Marc/Mentat / Omar Yahya...[et al.]

Yahya,, Omar and HP Manurung, Yupiter and Sulaiman,, Mohd Shahar and Prajadhiana,, Keval and Omar, Abdul Rahman and Kuntjoro, Wahyu (2018) Virtual manufacturing for prediction of Martensite Formation and Hardness Value induced by Laser Welding Process using Subroutine Algorithm in MSC Marc/Mentat / Omar Yahya...[et al.]. Journal of Mechanical Engineering (JMechE), 15 (2). pp. 107-125. ISSN 1823-5514 ; 2550-164X

Abstract

In this paper, a coupled thermal-structural and metallurgical model of laser welding process is simulated by using Finite Element Method (FEM) enhanced with Fortran-based subroutine within MSC Marc/Mentat. The investigated model specimen is in the form of butt joint plate with thickness of 2mm and material of low carbon steel (C15). The core purpose of the simulation is to predict Martensite formation and hardness value after laser welding process. In the simulation, a heat source model following conical shape is implemented instead of existing Goldak’s double ellipsoid used commonly for arc welding process. The Martensite formation and hardness are predicted based on Seyyfarth-Kassatkin Model, the results of which are to be verified with the welding Continuous Cooling Transformation (CCT) diagram. It can be concluded that the algorithms to model the heat source and to calculate the cooling time t8/5 are successfully developed and implemented. The simulated heat source shape produced using conical model represents good similar feature with typical laser heat source. Based on the calculated t8/5, it is also found that the results of Martensite formation and hardness value show good agreement within acceptable discrepancy compared to the approximated analysis from CCT diagram.

Metadata

Item Type: Article
Creators:
CreatorsEmail / ID. Num
Yahya,, OmarUNSPECIFIED
HP Manurung, Yupiteryupiter.manurung@salam.uitm.edu.my
Sulaiman,, Mohd ShaharUNSPECIFIED
Prajadhiana,, KevalUNSPECIFIED
Omar, Abdul RahmanUNSPECIFIED
Kuntjoro, Wahyuwkuntjoro@salam.uitm.edu.my
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Universiti Teknologi MARA, Shah Alam > Faculty of Mechanical Engineering
Journal or Publication Title: Journal of Mechanical Engineering (JMechE)
Journal: UiTM Journal > Journal of Mechanical Engineering (JMechE)
ISSN: 1823-5514 ; 2550-164X
Volume: 15
Number: 2
Page Range: pp. 107-125
Official URL: https://jmeche.uitm.edu.my/
Item ID: 36330
Uncontrolled Keywords: Finite Element Method, Welding Simulation, Heat Source Model, Martensite Formation, Hardness, t8/5
URI: http://ir.uitm.edu.my/id/eprint/36330

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