First-Principle Calculation on Critical Velocity for Cu and Al Cold-Spray Bonding
13 Pages Posted: 5 Oct 2020
The first-principles calculation with a newly developed high-efficient computing method was firstly applied to prediction of critical velocity for Cu/Al cold-spray bonding without any empirical parameters. An excellent agreement between predicted values and experimental values was obtained. The bonding mechanism of cold-spray was clarified by analyzing the atomic response in displacement during cold-spray process. A mixed bonding mechanism of adiabatic shear instability and pressure-release was confirmed. The computing method could be popularized to extensive applications in critical velocity prediction.
Keywords: Critical velocity, Cold-spray, bonding mechanism, First-Principles Calculation
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