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On the formation of double zones of necking during hot tensile tests
Author(s) -
Kaluba Wlodzimierz J.,
Cau Laurent,
Mesmacque Gerard
Publication year - 1993
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199301028
Subject(s) - necking , ultimate tensile strength , materials science , tensile testing , composite material , microstructure , austenite , metallurgy , die (integrated circuit) , nanotechnology
The phenomenon of double necking during hot tensile tests is discussed in this work. The investigation was carried out on high‐carbon steel using a tensile testing machine equipped with an integral heating system. Tensile tests were performed in a large temperature range to obtain the mechanical characteristic of the material. Microstructure evolution was observed by light microscopy and hardness measurements to determine the position of double zones of necking. A significant increase in flow stress of as‐transformed austenite was found to be at the origin of the double necking behaviour.