The high-strength steel and its weld under impact. (2022)

• Record Type: Journal Article
• Authors: Szymczak, Tadeusz; Kowalewski, Zbigniew L.
• Is Part Of: Materials today. Volume 62:Part 5(2022)
• Page Start: 2554
• Page End: 2559
• Publication Date: 2022
• Subjects: High-strength steel -- S700MC -- Weld -- Impact -- Fracture -- Degradation; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2022.03.369
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: The paper presents the results of Charpy impact tests conducted on the S700MC steel and its weld under the range of impact energy amounts from 50 J to 300 J. The material responses in the form of accumulated energy, force, projectile velocity, and deflection versus time are determined and discussed in detail. Fracture zones were analyzed by means of the macro-photography technique giving their features such as a shape of cracks and type of damage (brittle or ductile). In case of the parent material and weld an influence of the impact energy amount on their properties was well visible. A significant change of the fracture zone features with the increase of the energy amount was observed during an examination of the steel. The weld fracture was less sensitive on the energy amount. Physical magnitudes for the steel and the weld expressed a 30% reduction of the accumulated energy in comparison of that for the joint observed. In the case of weld the values of projectile velocity exceeded those for the parent material obtained. Deflection courses of the parent material and weld tested were the same at the initial phase of the experiment, however, finally they were higher for the weld material. The data captured during this research enabled a technical quality examination of the welding joint tested.