Phase constitution in the interfacial region of laser penetration brazed magnesium–steel joints

Miao, Yugang; Han, Duanfeng; Xu, Xin; Wu, Bintao

doi:10.1016/j.matchar.2014.03.019

Cited by 17 publications

(10 citation statements)

References 16 publications

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“…The analysis of the technological processes and the sought of the Al-rich phases applications provide for the greatest prospect of their use in the area of welding and the production of heat-resistant barrier coatings [ 56 , 57 ]. However, the potential area of their application may be changed at the time of acquiring comprehensive knowledge of the structural and strength properties determining their possible applications.…”

Section: Resultsmentioning

confidence: 99%

“…The micro-cracks observed in the corners of indentations were used to determine the critical stress intensity factor K 1C , which is a measure of the fracture toughness [ 30 , 48 , 49 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 ]. The collected information allowed us to compare the properties of the obtained Al-rich single-phases intermetallic alloys with other structural intermetallics, brittle ceramic materials and the classic construction materials.…”

Section: Methodsmentioning

confidence: 99%

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Characterization of Low-Symmetry Structures from Phase Equilibrium of Fe-Al System—Microstructures and Mechanical Properties

2015

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Fe-Al intermetallic alloys with aluminum content over 60 at% are in the area of the phase equilibrium diagram that is considerably less investigated in comparison to the high-symmetry Fe3Al and FeAl phases. Ambiguous crystallographic information and incoherent data referring to the phase equilibrium diagrams placed in a high-aluminum range have caused confusions and misinformation. Nowadays unequivocal material properties description of FeAl2, Fe2Al5 and FeAl3 intermetallic alloys is still incomplete. In this paper, the influence of aluminum content and processing parameters on phase composition is presented. The occurrence of low-symmetry FeAl2, Fe2Al5 and FeAl3 structures determined by chemical composition and phase transformations was defined by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) examinations. These results served to verify diffraction investigations (XRD) and to explain the mechanical properties of cast materials such as: hardness, Young’s modulus and fracture toughness evaluated using the nano-indentation technique.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Characterization of Low-Symmetry Structures from Phase Equilibrium of Fe-Al System—Microstructures and Mechanical Properties

2015

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“…Laser self-welding only uses a laser source without filling interlayers and filler metals. In one case, the laser melted the Mg alloy, which wets and spreads on the surface of the steel, and forms a brazing joint [31,32,33,34]. In another instance, the laser was focused on the top surface of the steel plate and melted the Mg alloy by thermal conduction heat, thereby forming a brazed joint [35].…”

Section: Welding-brazingmentioning

confidence: 99%

“…Firstly, laser-brazed AZ31 Mg alloy to Q235 steel joint was investigated by Miao et al [31,32,33]. The Mg alloy was melted and the steel melting was restricted.…”

Section: Welding-brazingmentioning

confidence: 99%

“…A Mg/Fe transition layer was formed for the strong interfacial metallurgical reaction. The compounds were identified as Al-rich phases, such as Mg 17 Al 12 , Mg 2 Al 3 , FeAl and Fe 4 Al 13 [33]. At the upper part of the joint, an obvious transition zone was found on the AZ31/Q235 interface, and the element distributions varied slowly in the interfacial layer, which was related to the little melting or dissolving of steel.…”

Section: Welding-brazingmentioning

confidence: 99%

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A Review of Bonding Immiscible Mg/Steel Dissimilar Metals

Song

et al. 2018

Materials

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The challenge of joining immiscible Mg/Steel dissimilar metals lies in the absence of an Fe-Mg intermetallic or Fe-Mg solid solution in an Mg-Fe system, and differences in their physical and chemical properties. Promoting interfacial reaction and regulating the composition of interface layer are beneficial for the formation of an Mg/steel interface layer and to obtain an effective Mg/steel joint. This research work focusses on the bonding of immiscible Mg/steel dissimilar metals: First, an Mg/steel interface layer was designed by controlling the composition of added alloy elements and trace elements in the base metal. Second, the Mg/steel dissimilar metals welding methods were divided into three parts—solid state welding, welding-brazing and fusion welding. The main distinctions between them were difference in interfacial temperature, thickness of interface layer, and type of compound. Third, the orientation relationships (OR) of the Mg/interface layer system and the interface layer/steel system was investigated. In this review, the effect of welding processing parameters, addition of alloy elements, base metal, and different welding methods on the joint’s performance was studied. The mechanical property, microstructure, interface layer and metallurgical reactions of the joint were also examined. The most recent progress in joining immiscible Mg/Steel dissimilar metals and future research prospects are presented at the end of the paper.

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Research Progress on Control Strategy of Intermetallic Compounds in Welding Process of Heterogeneous Materials

Lü

Zhang

et al. 2021

steel research int.

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Since the beginning of the 21st century, countries around the world have continuously increased their efforts in environmental governance. It has higher requirements for the performance of materials, not only to ensure that it is clean and nonpolluting, but also to maximize benefits. The mechanical properties and economic value of a single material can no longer meet the production needs of enterprises. Therefore, more people use composite materials to replace single materials. The use of composite materials not only can effectively respond to the concept of green development, but also reduces cost input to a lager extent. The composite of dissimilar metals can volatilize the respective advantages of the two materials. Common materials can be used to replace rare metals to reduce the use of precious metals. [1][2][3][4] World-renowned automobile companies such as Japan's Toyota and Honda are vigorously researching lightweight production technologies. Lightweight alloys (such as magnesium [Mg] alloys, aluminum [Al] alloys, etc.) could be used in place of steel in non-load-bearing structures. Mg alloys are one of the lightest metal materials so far, with a density of only 1.74 g cm À3 , which is about 2/3 of Al, 1/4 of zinc, and 1/5 of steel. They have high specific strength, specific stiffness, good damping performance, and easy recycling and other advantages, known as the "21st century green engineering metal materials." Titanium (Ti) alloy is expensive and its processing performance is relatively poor. Steel has

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Phase constitution in the interfacial region of laser penetration brazed magnesium–steel joints

Cited by 17 publications

References 16 publications

Characterization of Low-Symmetry Structures from Phase Equilibrium of Fe-Al System—Microstructures and Mechanical Properties

Characterization of Low-Symmetry Structures from Phase Equilibrium of Fe-Al System—Microstructures and Mechanical Properties

A Review of Bonding Immiscible Mg/Steel Dissimilar Metals

Research Progress on Control Strategy of Intermetallic Compounds in Welding Process of Heterogeneous Materials

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