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Effect of ultrasonic peening on mechanical properties of low carbon steel AISI 1020 TIG welding joints process

Mohammed Ali Ghusoon Ridha, Ridha Ali Zuhair, Sadeq Dina Abbas, Ebraheem Ahmed Absullah, Atta Amal Sadeq

International Journal of Applied Mechanics and Engineering

2022

Vol. 27, no. 4

194--204

In this paper, the effect of ultrasonic peening surface treatment on the mechanical properties of TIG butt weld joints of low-carbon steel (AISI 1020) was studied. A single V-angle (45°) was made on sheets of metal used then welded at constant parameters, namely: current, voltage. Wire filler ER70S-3 with argon was used to obtain many butt welding joints. Some of them were subjected to ultrasonic peening at one, two and three passes. The micro-hardness, microstructure, tensile and bending were tested. The results show increases in the tensile strength after the welding process. The test results showed improvements in the tensile strength of the weldments in comparison to the base metal. On the other hand, the tensile strength decreased with the ultrasonic process. Nevertheless, the tensile strength increased at a high number of ultrasonic passes. On the contrary, the ultrasonic process enhanced the bending strength compared to the base metal, whereas the weldments ability to bend deteriorated.

The computer system for design of the TIG welding operation

Perzyński K., Rauch Ł., Szeliga D., Rońda J., Pietrzyk M.

Journal of Machine Engineering

2010

Vol. 10, No. 3

60--67

The paper presents a computer system dedicated to simulation of the TIG welding process. The main functionality of the system, i.e. support and facilitation of design of welding technology, will be obtained through flexible combination of the modular architecture of the numerical library and optimization procedures. The TIG heat source model and a structure of a computer system is described. The analysis of phenomena occurring in welded material is important for a selection of optimal process parameters. This contributes to improvement of the product reliability. Particular attention is focused on the development of a reliable numerical model of TIG welding for the linear joint. All process parameters are identified and gathered together in one complex database. The phenomenological heat source model is validated by comparison of evaluated temperatures in a discrete pint with experimental measurements. The validated heat source model is used as the main part of a computer system supporting TIG welding. The architecture of this computer system as well as details of implementation are described in the paper.