Review of the weldability window concept and equations for explosive welding

18th APS-SCCM; 24th AIRAPT

Ribeiro, J.B.^1 ; Mendes, R.^1 ; Loureiro, A.^2

LEDAP - Lab. Energetics and Detonics, Department of Mechanical Engineering, University of Coimbra, Rua Luis Reis Santos, Polo II, Coimbra

3030-788, Portugal^1

CEMUC - Centro de Engenharia Mecânica, Universidade de Coimbra, Department of Mechanical Engineering, Rua Luis Reis Santos, Coimbra

3030-788, Portugal^2

关键词: Collision angles;    Collision point velocity;    Cylindrical configurations;    Explosive cladding;    High velocity;    Oblique collision;    Solid-state process;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/5/052038/pdf
DOI  :  10.1088/1742-6596/500/5/052038

来源: IOP

【 摘 要 】

Explosive cladding/welding is usually considered a solid state process in which the detonation of a certain amount of an explosive composition is used to accelerate one of the materials to be weld against the other in order to promote a high velocity oblique collision that will be responsible for bonding the materials. The conditions that should be met to achieve good welds define what is called as a weldability window or criteria. A weldability criteria based on the collision point velocity (Vc) and on the collision angle (β) is the most used today. In the β-Vcspace the weldability window is defined by four lines or limits. Despite of its wide used in explosive welding works, neither the concepts behind those limits neither the equations used to define them in the β-Vcspace are particularly clear. Contradictory concepts, and equations with undefined variables or parameters, are commonly found in the literature. This paper aims to clarify those concepts and equations through an integrated description of the weldability limits and a reviewed presentation of the associated equations with the variables and parameters, including their units, clearly defined. The reviewed concepts and equations are then used for the description of the explosive weld of stainless steel to carbon steel in cylindrical configuration.