Experimental investigation on enhancing the adhesive bonding behaviour of titanium-di-oxide-based BK-9 adhesives under varying ambient temperature

Abstract

ABSTRACT Adhesive bonding has become increasingly popular in the aeronautic and automobile sectors due to its ability to reduce weight, create strong bonds, and join dissimilar materials. The primary aim of the study is to conduct experimental analysis on Single-Lap Joints (SLJs), specifically focusing on varying ambient temperatures from (25°C to 65°C) while keeping the loading rate constant at 1.3 mm/min. This study used SAE 1020 steel, AA2024-T3, and BK-9 adhesive to manufacture SLJs. The adhesive-bonded SLJs were developed using dissimilar and similar adherends. The thermal behavior of the BK-9 adhesive was examined by conducting Digital Scanning Calorimetry (DSC) and Thermal Gravimetry Analysis (TGA) before and after subjecting it to elevated temperatures. The bonding quality has been examined using ultrasonic testing. The failure strength of the adhesive bond on SLJs was performed at the Universal Testing Machine (UTM) using tensile testing equipment, and a Field Emission Scanning Electron Microscope (FESEM) was utilized to determine the failure patterns. The result indicate that the SAE 1020-SAE 1020 steel joints exhibited superior mechanical behaviour, showing the highest failure load of 5.120 kN at 25°C room temperature, respectively.