Noise level assessment and mechanical properties of welded joints of aluminium alloys of the Al-Cu-Li system in FSW and TIG welding

Abstract

This research paper presents hardness, structure and tensile strength analysis of 1460 alloy of Al-Cu-Li system, welded joints made by Tungsten Inert Gas (TIG) welding and Friction Stir Welding (FSW). Characteristics of acoustic noise at the welding operator workplace during mechanized TIG and FSW of aluminium-lithium alloy with the purpose to develop recommendations for the improvement of health and safety during welding processes were studied. Analyzing results, we concluded that during TIG welding the values of welding noise at the workplace, are much higher than the admissible noise level limit. Results showed that the values of the welding nose reach 95 dB. The noise level at the workplace for FSW is also dangerous and reaches up a value of 84.3 dB. Also, this paper presents hardness, structure, and tensile strength measurements of 1460 alloy welded joints made by TIG and FSW welding.

Identification of Noise Levels for Skill Training Activities, Equipment, Machines and Power Tools at TVET Institutes in Malaysia

“…Next, the metal manufacturing industry is also identified to expose workers to noise hazards [ 10 , 13 , 55 ]. Activities such as metal cutting, grinding, shearing and welding are known to produce high noise levels [ 56 , 57 ]. In 2020, an occupational noise-related hearing disorder (ONRHD) report on 7941 cases was confirmed by the DOSH [ 7 ].…”

Effect of Misalignment of Axes in Double-Sided Weld on Stresses Distribution in Butt Welded Joints

“…As a result, the failure in stress concentration zones occurs at static load as well. The results of tensile tests of butt welded specimens made of high strength aluminium alloys 1460Т1 [3] and 2219Т8 [4] show that failure occurs in fusion zone (FZ), where the level of stress concentration is the highest. Other research [5,6] also showed that geometrical characteristics of the weld define the distribution of local stresses and therefore significantly effect on mechanical properties of butt joints produced by fusion welding.…”