Interfacial microstructure and strengthening mechanism of dissimilar laser al/steel joint via a porous high entropy alloy coating

Effect of Al-Si Coating on the Interfacial Microstructure and Corrosion Resistance of Dissimilar Laser Al Alloy/22MnB5 Steel Joints

“…Lightweight design and manufacturing of automotive structures are fundamental for the development of the motor industry [1][2][3]. Due to the advantages of being lightweight and exceptionally resistant to corrosion, aluminum alloys have good prospects for application in the weight reduction of automotive structures by replacing conventionally used steels [4][5][6]. At the same time, to satisfy the demand for weight reduction and to improve the safety and crashworthiness qualities of vehicles, automakers have made remarkable advancements in the production of sophisticated high-strength steels (AHSSs), including martensitic steel, dual-phase steel, and boron alloy steel to obtain higher strength and thinner structural sizes [7].…”

Dissimilar Probeless Friction Stir Spot Welding of Aluminum Alloy and USIBOR®1500-AS Steel Thin Plates

“…Ultra-High-Strength Steels (UHSS), together with aluminum alloys, hold significant potential for a substantial reduction in the overall vehicle weight, thereby improving fuel efficiency and reducing emissions [1]. However, joining automotive components made of steel and aluminum using traditional fusion welding is known to be challenging due to the formation of intermetallic Fe x Al y compounds (IMCs), porosity, cracking, and softening of the aluminum side [2][3][4][5]. Since the formation of IMCs is related to the chemical reaction and interdiffusion between Fe and Al, its thickness is largely determined by the temperature and duration of the welding process [6].…”

1000 °C High-Temperature Wetting Behaviors of Molten Metals on Laser-Microstructured Metal Surfaces

“…However, only few literature studies focused on the wettability of molten metals at high temperatures (e.g., 1000 °C) compared with the wettability studies on more common liquids under more gentle conditions, such as water and low-melting-point liquid metals at room temperature. − Various simulations have been performed to predict the probable wetting behaviors of molten metals on various substrates, − but practical observations remain scarce due to the availability of materials and the strict environmental requirements. Among the restricted experimental work, researchers prefer to improve the wettability of molten metals with several kinds of solid surfaces for better performance in welding, brazing, metal-based composite formation, and lithium battery preparation. − ,− For example, Wu et al proposed a method to enhance the wettability of a kind of room-temperature gallium-based liquid metal on polyacrylate surfaces for a better connection, Fan et al modified the wetting and spreading behaviors of Sn on the SiC surface by changing the content of the alloying element Cr, Li et al enhanced the wettability of molten high manganese steel with Ni–Co-coated ZTA ceramic particles to strengthen the abrasive wear resistance of the composites, and Sui et al studied the wetting ability of molten Ce and Cu–Ce alloy on various carbon materials. Liu et al introduced ultrasonic power to improve the wetting of the Zn filler on the TC4 alloy and further strengthen the mechanical properties of the brazed joint, and Griffith et al investigated the effect of droplet size on the wetting behaviors of molten Sn on copper substrates for better performance of microsolder joints.…”