High-temperature deformation behavior and thermal properties of an Ni30Co17Fe53 alloy

• Published in: International journal of materials research Vol. 103; no. 7; pp. 821 - 827
• Main Authors: Lee, Kwang Seok, Yoon, Dong Hyun, Jung, Joong Eun, Chang, Young Won, Lee, Jung Hwan
• Format: Journal Article
• Language: English
• Published: Munich De Gruyter 01.07.2012; Hanser
• Subjects: Applied sciences; Construction materials; Deformation; Deformation behavior; Exact sciences and technology; Hot forging; Mathematical models; Metals. Metallurgy; Ni30Co17Fe53 alloy; Power dissipation; Strain rate; Thermal conductivity; Thermal expansion; Thermal expansion coefficient; Thermal properties; Temperature; Deformation; Forgings; High temperature; Thermal properties; Thermal expansion; Forging; Ni30Co17Fe53 alloy; Deformation behavior; Thermal expansion coefficient; Hot forming; Expansion; Hot forging
• DOI: 10.3139/146.110695
• ISSN: 1862-5282

High temperature deformation behavior of a Ni30Co17Fe53 alloy has been investigated by carrying out hot compression tests at temperatures ranging from 600°C to 1150°C under strain rates between 10 and 1 s . Both the temperature and strain-rate dependence of the flow stress were found to be described by a hyperbolic sine function. Hot formability of this alloy was also estimated by constructing an empirical processing map based on a dynamic materials model, from which the region with high power dissipation efficiency was exhibited as a feasible combination of processing condition at around 1150°C and 10 s . Three different thermo-mechanical treatment processes were adopted for hot-forging to investigate its influence on microstructure and subsequent thermal expansion and thermal conductivity.