Exergy Analysis of A36 Mild Steel Welding Process and Investigation of Hammering, Parallel Heating and Vibration Method on Residual Stress Reduction

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MAMOURIAN M.; Naghedifar s.a.; Mohammadi Neyshaburi m.

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Journal: Modares Mechanical Engineering Year:2020 | Volume:20 | Issue:8 Page(s): 1979-1989

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Title

Exergy Analysis of A36 Mild Steel Welding Process and Investigation of Hammering, Parallel Heating and Vibration Method on Residual Stress Reduction

Author(s)

MAMOURIAN M. | Naghedifar s.a. | Mohammadi Neyshaburi m. | Issue Writer Certificate

Keywords

Welding Residual StressQ2

ExergyQ1

HammeringQ1

Parallel HeatingQ1

Vibration MethodQ1

Abstract

Residual stress is one of the most substantial defects of welded parts caused by intensive thermal gradient. In this study, different mechanical and thermal techniques for reducing residual stresses have been investigated and the effectiveness of contributing parameters has been discussed afterwards. Subsequently, some equations have been proposed for welding energy and Exergy efficiency and the effects of parallel flame heating, Vibration Method, and hammer working method on reducing Welding Residual Stresses are expressed. The results show that by using Parallel Heating technique, the enhancement of flame power would result in reducing both energy and Exergy efficiencies. However, the decremental rate of the two efficiencies would slow down and they approach to an asymptotic value. Increasing the speed of welding improves two efficiencies more than 2 times. On the other hand, the normalized entropy is reduced by increasing the heat input of the flames. This fact is an indicator of a reduction in Welding Residual Stress. This reduction is more at high speeds. Eventually, the ratio of the two efficiencies shows that in this study, economical power was about 1800j/s. The reduction of normalized entropy for the vibration, Hammering, and parallel flame methods are 0. 001, 0. 1, and 10, respectively. Overall, it is expected that thermal methods are more efficient than mechanical methods in reducing residual stresses.

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APA: Copy

MAMOURIAN, M., Naghedifar, s.a., & Mohammadi Neyshaburi, m.. (2020). Exergy Analysis of A36 Mild Steel Welding Process and Investigation of Hammering, Parallel Heating and Vibration Method on Residual Stress Reduction. MODARES MECHANICAL ENGINEERING, 20(8 ), 1979-1989. SID. https://sid.ir/paper/373811/en

Vancouver: Copy

MAMOURIAN M., Naghedifar s.a., Mohammadi Neyshaburi m.. Exergy Analysis of A36 Mild Steel Welding Process and Investigation of Hammering, Parallel Heating and Vibration Method on Residual Stress Reduction. MODARES MECHANICAL ENGINEERING[Internet]. 2020;20(8 ):1979-1989. Available from: https://sid.ir/paper/373811/en

IEEE: Copy

M. MAMOURIAN, s.a. Naghedifar, and m. Mohammadi Neyshaburi, “Exergy Analysis of A36 Mild Steel Welding Process and Investigation of Hammering, Parallel Heating and Vibration Method on Residual Stress Reduction,” MODARES MECHANICAL ENGINEERING, vol. 20, no. 8 , pp. 1979–1989, 2020, [Online]. Available: https://sid.ir/paper/373811/en

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