Influence of edge and corner cracks on the impact and bending behavior of spring steel. (2021)

• Record Type: Journal Article
• Authors: Manjula, S.; Arun, K.V.
• Is Part Of: Materials today. Volume 42:Part 2(2021)
• Page Start: 1251
• Page End: 1257
• Publication Date: 2021
• Subjects: Corner cracks -- Edge cracks -- Spring steel -- Impact loads -- Bending loads -- Fractured facets -- SEM; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2020.12.880
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: During the course of production of the spring steels, depending on the production process, the ductility drop and decrease in strength will lead to crack formation in the spring steel. Also some of the strength enhancing heat treatment process directly influences the service performance of spring steel by the emanating edge and corner cracks, which is an important scientific issue. The present experimental investigation focuses of the impact and bending behavior of spring steel with varied edge and corner crack configurations. The behavior of the material has also been investigated to ascertain its satisfactory service temperature. The specimen preparation and the experimentations have been carried out according to the ASTM standards. The results have revealed that the corner cracked spring steel can give effective service till 100 °C, beyond which it will decrease drastically. It is also determined that the double corner cracked samples have highest impact energy and lowest is noted for triple corner notched samples. In case bending loads the, the double edge notched sample loaded in the thickness direction has shown maximum strength and the lowest in noted for the triple sided notched samples. Finally it can be stated that the presence of edge and corner cracks in the spring steel will reduce the strength, service life and will lead to the most dangerous catastrophic failure.