Lower boundary in metal explosive welding. Evolution of ideas

“…According to the macroscopic morphology, the 2205/AZ31B bimetallic composite had an almost-straight bonding interface. Based on the explosive weldability window theory [23], straight, wavy and melting interfaces could be formed after the explosive welding. The interface morphology is related to welding process parameters and the properties of materials.…”

Section: Morphology Near the Interfacementioning

confidence: 99%

Microstructural Characteristics and Mechanical Properties of 2205/AZ31B Laminates Fabricated by Explosive Welding

2017

Metals

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Abstract:A bimetal composite of 2205 duplex stainless steel and AZ31B magnesium alloy was cladded successfully through the method of explosive welding. The microstructural characteristics and mechanical properties of 2205/AZ31B bimetal composite are discussed. The interface of 2205/AZ31B bimetallic composite was a less regular wavy morphology with locally melted pockets. Adiabatic shear bands occurred only in the AZ31B side near explosive welding interface. The microstructure observed with EBSD showed a strong refinement near the interface zones. Line scan confirmed that the interface had a short element diffusion zone which would contribute to the metallurgical bonding between 2205 duplex stainless steel and AZ31B magnesium alloy. The value of micro-hardness near the bonding interface of composite plate increased because of work hardening and grain refinement. The tensile shear strength of bonding interface of 2205/AZ31B composite was 105.63 MPa. Tensile strength of 2205/AZ31B composite material was higher than the base AZ31B. There were two abrupt drops in stress in the stress-strain curves of the 2205/AZ31B composite materials.

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“…However, no effect on the weld quality could be found. Even the most recent works on explosion welding do not take into account the surrounding medium [4]. Previous investigations on electromagnetic pulse welding show that the width of the welded area increases significantly in vacuum and that a joint can be obtained at lower discharge currents [5].…”

Section: Introductionmentioning

confidence: 99%

Identification of Process Parameters in Electromagnetic Pulse Welding and Their Utilisation to Expand the Process Window

Pabst¹,

Groche²

2018

IJMMM

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Abstract-Impact welding, represented by the industrial processes explosion welding and electromagnetic pulse welding, offers unique advantages over conventional welding processes, especially fusion welding. The joint is produced during a high speed impact between two workpieces without additional heating or melting. Thus, even dissimilar metals can be joined. However, in contrast to fusion welding, the fundamentals are understood to a significantly lesser extent. In this publication, the effect of the density of the surrounding gaseous medium is investigated. The results show that a lower density results in a higher weld strength. At higher densities, a weld can even be inhibited completely. High speed images of the impact indicate that this is caused by the obstruction of the so-called jet due to the increased air resistance. In general, "jetting" describes the ejection of oxides, dirt and superficial material from the closing gap during the impact. It is presumed to be essential for the formation of the bond.

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Lower boundary in metal explosive welding. Evolution of ideas

Cited by 89 publications

References 1 publication

Weldability window and the effect of interface morphology on the properties of Al/Cu/Al laminated composites fabricated by explosive welding

Weldability window and the effect of interface morphology on the properties of Al/Cu/Al laminated composites fabricated by explosive welding

Microstructural Characteristics and Mechanical Properties of 2205/AZ31B Laminates Fabricated by Explosive Welding

Identification of Process Parameters in Electromagnetic Pulse Welding and Their Utilisation to Expand the Process Window

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