Kartashev M.F., Permyakov G.L., Trushnikov D.N., Mindibaev M.R. Understanding the Effect of Work Hardening on the Mechanical Properties of Aluminum Alloy 5056 Specimens Produced by Multilayer Surfacing

Abstract

In spite of the rapid development of additive manufacturing technology, the industry has a demand for large parts and the most common processes, such as Selective Laser Melting or Laser Cladding, cannot satisfy this demand. In this regard, Wire-Arc Additive Manufacturing (WAAM) enables to produce large components, such as those finding application in the aerospace industry. However, WAAM processes usually cause high residual stresses due to high deposition rates and excessive heat input. In addition, the mechanical properties of the clad metal are significantly affected by porosity and poor microstructure. In-process work hardening, such as surface work hardening through highly dynamic impacts (also known as forging), can help refine the structure, lower the porosity and residual stresses thus benefiting the properties of clad metal. This paper describes an experimental study that looked at the mechanical properties of aluminium specimens produced by multilayer surfacing in different temperature cycles with or without forging. The results of the mechanical tests are also presented. It was found that forging had an impact on the mechanical properties of the aluminum alloy 5056 specimens.

Keywords

Additive manufacturing, multilayer surfacing, cold metal transfer, CMT, aluminium, aluminum alloy 5056, work hardening, impact, mechanical properties, tensile properties, toughness, wire arc additive manufacturing, WAAM, arc welding.

Maksim F. Kartashev – Postgraduate Student, Engineer

Department of Welding, Metrology and Materials Engineering, Perm National Research Polytechnic University, Perm, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Gleb L. Permyakov – Junior Research Fellow

Laboratory “Processing of Materials with Highly Concentrated Energy Sources”, Perm National Research

Polytechnic University, Perm, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Dmitry N. Trushnikov – Dr.Sci. (Eng.), Professor

Maksim R. Mindibaev – Bachelor’s Degree Student

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