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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.

The use of hat-shaped specimens for dynamic shear testing

Peirs J., Verleysen P., Degrieck J.

Foundations of Civil and Environmental Engineering

2008

No. 11

97-111

In recent decades, specimens with hat-shaped geometry have been used to study materials with respect to their shear behavior including strain localization and adiabatic shear banding (ASB). However, the interpretation of the experimental results is still not straightforward because of the complex stress distribution in the shear region of the specimen. More comprehensive use of the hat-shaped specimen is possible when a better description of the distribution and evolution of the stress state in the specimen is available. This paper presents the results of dynamic and static experiments on Ti-6Al-4V and numerical simulations in ABAQUS/Explicit. The stress, strain and temperature distribution and evolution is examined for specimens with varying dimensions. The aim is to identify the important factors that affect the experimental results.