Open AccessExplosive and thermochemical treatment of multi-layer metallic composites
Author(s) -
J. Nowaczewski,
Milena Kita,
Justyna Świeczak,
J. Rudnicki
Publication year - 2019
Publication title -
materiały wysokoenergetyczne
Language(s) - English
Resource type - Journals
ISSN - 2083-0165
DOI - 10.22211/matwys/0066e
Subject(s) - materials science , explosive material , hardening (computing) , scanning electron microscope , intermetallic , indentation hardness , composite material , nitriding , composite number , hardness , energy dispersive x ray spectroscopy , metal , layer (electronics) , metallurgy , microstructure , chemistry , organic chemistry , alloy
The paper describes methods for the explosive hardening of metals which were performed with a view to increasing the hardness of previously obtained composites, as well as treatment of their surface layers to increase the efficiency of further thermochemical treatment. Typical systems for explosive hardening of metals and the construction of current systems, are discussed. The resulting effects of explosive hardening are illustrated with before and after diagrams of microhardness distributions in cross-sections of the processed composites hardening. In a further processing stage, the tested composite samples were subjected to ion nitriding. As a result of this process, in addition to the typical increase in hardness of the individual layers, an intermediate phase with a distinctly higher hardness was observed in the junction zone. Preliminary analysis of the photographs and the results from a scanning electron microscope (SEM) with an energy dispersive spectroscopy (EDS) attachment suggests that the particularly beneficial properties of the composites are attributed to the presence of the intermetallic layer.