Investigation of laser welding on butt joints of Al/steel dissimilar materials

Microstructures and Mechanical Properties of Dissimilar Al/Steel Butt Joints Produced by Autogenous Laser Keyhole Welding

“…P and v are generally important process variables affecting the heat input, as in regular arc welding. ∆d refers to the distance from the laser focus to the interface illustrated in Figure1b, and is an important parameter only in laser welding, which also controls the welding thermal cycles and cooling rates at the interface [24,30,31]. As a result, the process parameters of ∆d and v were considered for studying the process parameter influence upon the laser keyhole welded Al/steel butt joints.…”

“…With the laser keyhole-welding technique, rather good mechanical properties were obtained by irradiating steels placed on Al sheets, and limiting Al to steels mixed with a reduced steel penetration in Al alloys [8]. This indicates that the laser keyhole welding process was mainly used to lapped or overlapped joints [12,13,15,[22][23][24]. It can be, but rarely is, used for welding Al/steel butt joints requiring accurate groove preparations, flux and filler wires [24][25][26][27].…”

“…This indicates that the laser keyhole welding process was mainly used to lapped or overlapped joints [12,13,15,[22][23][24]. It can be, but rarely is, used for welding Al/steel butt joints requiring accurate groove preparations, flux and filler wires [24][25][26][27]. Although the use of filler wires or flux leads to some improvement in the joint properties, laser welding with filler materials has usually been considered too difficult for industrial applications because there are too many parameters and the requirements for wire positioning are too stringent [28], thereby reducing efficiency and productivity.…”

Microstructures and Mechanical Properties of Plasma Arc Welded Joints of Ultra-high Strength Steel and Aluminum Alloy Using Al–Si and Al–Cu Fillers

“…Wenhua GENG, 1) Di WU, 2) Daqian SUN, 1) * Hongmei LI 1) and Yingying CHE (Received on December 5, 2017; accepted on February 15, 2018) The weld appearance, microstructures and mechanical properties of plasma arc welded joints of ultra-high strength steel and aluminum alloy were studied. The weld appearance was improved when the single bevel groove was used.…”

“…Reducing emission of harmful gases and energy consumption is the major challenge in automotive industry with the aggravation of environmental pollution, 1) and automotive lightweight is recognized as one of the most effective technology to achieve the goal. Using lightweight materials such as aluminium instead of steel to form steel-aluminum composite structure not only ensures the safety of the vehicle, but also reduces automobile quality, which is widely used in the automotive manufacturing industry due to the advantages of corrosion resistance and high strength.…”