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Resistance of bimetallic plates on the dynamic cracking

Rydz D., Stradomski G., Wierzba A.

Journal of Achievements in Materials and Manufacturing Engineering

2014

Vol. 62, nr 1

19--24

Purpose: In this paper was set the aim to determine energy breaking during the impact test. As part of the work, the strength of the bimetallic plates exposed to cracking as a result of dynamic bending forces from the two layers as well as across the connection area of bimetallic plate was analyzed. Design/methodology/approach: To determine the technological properties of this group of materials are specially intended standards but none of them do not determine how to test the impact energy of such group of materials. In this paper are presented results of such test, with macro and microscopic analysis of fracture and merging area. Findings: Based on the results of laboratory tests can be concluded that the most exposed, X6CrNiMoTi17-12-2 - PN355NH bimetallic material, to the dynamic breaking are samples arranged according to variant a3 (i.e.. across the height of the bimetal layers merging zone). Research limitations/implications: This work aimed to highlight the problem of the bimetallic material resistance to cracking according to different initialization direction. Originality/value: The study attempts to identify how the material must be placed in the finished product to reduce as far as possible its exposure to crack. An important element in the correct determination of the impact of the material according to PN-EN ISO 148-1:2010 is the appropriate cutting of notch. For this purpose, a single-pass cutter guarantying to obtain uniform parameters of fracture initiation was developed.

Shear deformation and failure of explosive welded Inconel-microalloyed steels bimetals

Kwiecień M., Majta J., Dziedzic D.

Archives of Civil and Mechanical Engineering

2014

Vol. 14, no. 1

32--39

In the following study, the forced shear specimens were investigated to obtain mechanical characterization of Inconel-microalloyed steels bimetals achieved through explosive bonding process. The chrome–molybdenum steel (16Mo3) and high strength microalloyed steel (X70) plates were joined and compared as base materials in the bimetals. Tests were performed quasi-statically and dynamically to examine the influence of strain rate on the shear strength of the metallurgical bond between two steel components. The joined area was also analyzed using microhardness measurements and by light microscopy. (Wave bonding interface and plastic deformation was present in both bimetals). Melted zones, especially In the case of 16Mo3 steel, were observed. The qualitative and quantitative assessments of the mechanical state-using computer simulations as well as microhardness distributions and microstructure development in the forced shear specimens showed that bimetal Inconel 601/X70 was superior to Inconel 601/16Mo3.

Wpływ zwilżalności wyżej topliwego podłoża na jakość warstw miedzianych wytwarzanych metodą pośredniego grzania oporowego przy obniżonym ciśnieniu

Komorowski J., Binienda M., Pokrzywa M., Just P., Wołowiec E., Praska-Jaros A., Kula P.

Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska

2012

nr 4b

32-37

W artykule prezentowane są zagadnienia związane z badaniem wpływu zwilżalności wysokotopliwego podłoża na jakość warstw miedzianych wytwarzanych metodą pośredniego grzania oporowego przy obniżonym ciśnieniu. W pracy przedstawiono wyniki badań przetapiania sproszkowanej miedzi na podłożach metalowych o wyższej temperaturze topnienia niż sam surowiec. Metoda ta może znaleźć zastosowanie przy tworzeniu różnego rodzaju bimetali lub może posłużyć także do kierunkowego oczyszczania przetapianego surowca.

The article presents issues related to examination of the impact of wettability of high fusible substrate on a quality of the copper produced by indirect resistance heating at reduced pressure. This paper presents the results of remelting of powdered copper on metal substrates with melting points higher than those for the raw material. This method can be used to create different types of bimetals and may be used also for directional cleaning of remelted material.