Controlling liquation behavior and solidification cracks by Continuous laser melting process of AA-7075 Aluminum Alloy
Materials Letters • 2020
Publication Information
Authors
Asmaa M. Khalil, Irina Loginova,Alexey SoloninAhmed Omar Mosleh
Keywords
Not Available
Journal
Materials Letters
Publisher
Elsevier
Volume
Not Available
Issue
Not Available
Pages
Not Available
publication.type
International
Paper Link
Open Link
Supplementary Materials
Not Available
Abstract
Microstructure homogeneity, uniform elements distribution, and good mechanical properties are the main research challenges after the continuous laser melting (CLM) process. Adding modifiers to the AA7075 and selecting the proper process parameters are solvers for this challenge. Thus, this paper studies the effect of the CLM on the microstructure, elements distribution, and the microhardness of AA7075 with different modifier contents. The CLM process was carried out with a 300 V power and 0.1 m/sec laser scanning speed. The microstructure and elements distribution of the standard and the modified alloys after the CLM were analyzed. The obtained structure was fine with a uniform distribution of elements in all alloys except modified alloy with Fe+Ni. Microhardness was enhanced after the CLM, and the modified alloys with Fe+Ni and Sc+Zr recorded the highest microhardness values in the laser melted zone (LMZ).
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