Residual Deformation Measurement of Laser Weldment Using the Laser Interferometry

Liu, Zhan Wei; Zou, Da Qing; Chen, Wu Zhu; Wang, Wei Ning; Fang, Yan

doi:10.4028/www.scientific.net/KEM.326-328.63

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HomeKey Engineering MaterialsExperimental Mechanics in Nano and BiotechnologyResidual Deformation Measurement of Laser Weldment...

Residual Deformation Measurement of Laser Weldment Using the Laser Interferometry

Abstract:

In this paper, the residual deformation induced in laser welding processing was studied by using the moiré interferometry and a novel high-temperature specimen grating technology. The experimental results indicate that the heat-affected zone of laser welding is a narrow strip. There exists great residual strain gradient in the heat-affected zone, especially great residual shear strain gradient. It implies that great residual stress and stress gradient exist near the welded seam. The relationship between the size of the heat-affected zone and the changes of the technology parameters were discussed in the experiments, which can supply some reliable experimental data for optimizing processing technology.

Info:

Periodical:

Key Engineering Materials (Volumes 326-328)

Main Theme:

Experimental Mechanics in Nano and Biotechnology

Edited by:

Soon-Bok Lee and Yun-Jae Kim

Pages:

63-66

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.326-328.63

Citation:

Z. W. Liu et al., "Residual Deformation Measurement of Laser Weldment Using the Laser Interferometry", Key Engineering Materials, Vols. 326-328, pp. 63-66, 2006

Online since:

December 2006

Authors:

Zhan Wei Liu, Da Qing Zou, Wu Zhu Chen, Wei Ning Wang, Yan Fang

Keywords:

High Temperature Grating, Laser Weldment, Residual Strains

Export:

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Price:

$38.00

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References

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Paper TitlePages

Simulative and Experimental Study on Laser Compound Forming of Plate

Authors: Shu Huang, Jian Zhong Zhou, Yi Bin Chen, C.D. Wang, X.D. Yang, Y.C. Dai

Abstract: An appropriate finite element analytical model for laser compound forming (LCF) was established with ABAQUS code, and then some key technical issues in the simulations were studied and solved. Numerical simulation of LCF for V-shape was carried out to study bending deformation, residual stress distribution and micro-profile of AISI-1008 steel plate. After the corresponding experiments of LCF, the bending deformation, forming precision as well as the variation of surface integrities were mainly measured and analyzed. The results indicated that anticipated shape of V-plate could be precisely formed, meanwhile distribution of surface residual stress and surface qualities on plate were under good control.

3857

FEM Simulation of the Effects of Residual Stress on Deformation of Gyroscope Frame

Authors: Jun Zhan, Gui Min Chen, Xiao Fang Liu, Qing Jie Liu, Qian Zhang

Abstract: Gyroscope is the core of an inertia system and made by machining process. Machining process imports large residual stress. The residual stress will be released and induces large deformation of gyroscope frame. In this paper, the effects of residual stress on deformation of gyroscope frame were simulated by finite element method. Different stress distribution leads different deformation. Compressive stress can make sample long and tensile stress make sample short. The stress released in deformation process which reduced about 90%.

838

Hot Forming Behavior and Flow Stress Model of Steel 50A1300

Authors: Xu Dong Zhou, Xiang Ru Liu

Abstract: The researches of non-oriented silicon steel are mainly focused on the effect of main processing parameters on the microstructure and magnetic properties, but there have been few studied about its flow stress until now. In this paper, the non-oriented silicon steel 50A1300 of hot forming is studied by thermal-mechanical simulation method. The hot deformation behavior of the steel is explored and the flow stress model of the steel is established based on the creep mechanism. The model has good accuracy and is feasible.

1468

Mechanical Properties Evaluation of Metal Components Repaired by Direct Metal Lamination

Authors: Hisataka Takagi, Takeyuki Abe, Peng Cui, Hiroyuki Sasahara

Abstract: Direct metal lamination using arc discharge was applied to the repair of metal components such as metallic parts, dies and molds by adding equivalent metal to them. In this method, a heat-affected zone which has different mechanical properties from the base metal is formed near the laminated metal. This is because the rapid temperature change by welding heat input can cause phase transformation or metallic structure change. Therefore, the mechanical properties of the laminated metal, heat-affected zone and base metal after repair by direct metal lamination need to be explored. In addition, the region which needs to be repaired must be removed in advance because worn and defective parts aren’t adequate as the base for lamination of further layers. Thus, the most suitable removal shape for repair by direct metal lamination was investigated. Finally, the hardness distribution and toughness of the metal components after repair was explored. It was found that the hardness distribution of metal components after repair was uneven. However, the toughness of the heat-affected zone was found to be comparable to those of the laminated metal and the base metal.

440

HN45VMTYUBR Alloy: Impact of Laser Beam Welding Modes on Microstructure and Distribution of Alloying Elements in the Seam

Authors: D.A. Baranov, A.A. Parkin, S.S. Zhatkin

Abstract: The article reviews the results of experimental studies of microstructure and redistribution of alloying elements in heat-resistant alloy HN45VMTYUBR during laser beam welding (alloy produced according to GOST 5632-14). Impression of laser emission on redistribution of alloying elements throughout the depth of a welding seam is demonstrated. Analysis covers the microstructure of several welding and heat-affected zones and redistribution of the alloying elements in these zones. Increase in tungsten content in weld root is detected. Redistribution of alloying elements in welding zones is proven to impact strength characteristics of the seam.

530