The Study for Fracture Toughness of Steels and Metals

Dear Colleagues,

The material property governing fracture resistance due to the propagation of a crack is called fracture toughness. Since most manufactured parts contain defects or microcracks, induced during forming or inherent to material production, fracture toughness is a relevant property to assess their performance. It can be readily measured following well-established standard procedures, which is straightforward for brittle and low ductile materials but can be more challenging for metals and alloys with marked elastoplastic behavior. The measure of fracture toughness is also challenging for ‘thin’ sheets or plates, because the stress/strain conditions affect the property values, and thickness should be considered when characterizing thin-walled structures. New experimental approaches to measure fracture toughness are welcomed to better understand the fracture resistance of engineering materials.

Interest in fracture toughness is growing in new industrial sectors, such as automotive and lightweight construction, where the increasing use of very high-strength alloys is bringing new problems associated with the higher cracking sensitivity of such high-strength materials compared to the former more ductile material solutions. Proper measure of fracture toughness of high strength materials will also allow the development of new alloys with enhanced fracture resistance.

This Special Issue is devoted to papers addressing new approaches to measure fracture toughness in metals and alloys, and their application to understand material behavior during forming or the use of fracture toughness to predict part performance.

Prof. Daniel Casellas
Prof. Dr. Pär Jonsén
Guest Editors

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• fracture resistance
• microstructure
• testing
• forming cracks
• edge cracking