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1 2010

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Properties of sandwich metals joined by explosive cladding method

Čížek L., Ostroushko D., Szulc Z., Molak R., Praźmowski M.

Archives of Materials Science and Engineering

2010

Vol. 43, nr 1

21-29

Purpose: Paper presents results of investigations with two layers explosively formed sandwich composite consisting of different composition joint which requires very often knowledge of structure and mechanical properties. These properties are connected with microstructure that is influenced by technological factors under cladding. Design/methodology/approach: The sample bars were prepared from explosively formed sandwich composite near the join area. The methods of the light microscopy and the hardness and tensile test for evaluation of quality of joined sandwich metals were used. Investigations by a new fatigue method in the case sandwich composite steel CrNi(18/10) + Ti were completed. Findings: Measurement of micro-hardness in the zone of the joint a deformation of materials shows an increase value of that. Detailed metallographic observation detected in proximity of the joints an occurrence of structural non-homogeneities. Steel and titanium interface surfaces are corrugated. New fatigue method in the case sandwich composite steel CrNi(18/10) + Ti were verified. Research limitations/implications: Knowledge of microstructure characteristics will be extended by the method of SEM, including micro-analysis of individual structural components and surface analysis. Influence of experiment conditions on results of fatigue test must be more elaborated in future. Practical implications: The results may be utilized for a relation between structure and properties of the investigated materials in process of manufacturing. Originality/value: These results contribute to complex evaluation of properties explosively formed sandwich composite namely for explanation of structure developed new sandwich composites. The results of this paper are determined for research workers deal by development new exploitations of new sandwich composites.