Experimental and Numerical Investigations on Hot Deformation Behavior and Processing Maps for ASS 304 and ASS 316

• Main Authors: Kotkunde Nitin, Krishnamurthy Hansoge Nitin, Singh Swadesh Kumar, Jella Gangadhar
• Format: Article
• Language: English
• Published: De Gruyter 2018-10-01
• Series: High Temperature Materials and Processes
• Subjects: austenitic stainless steels; deformation behavior; constitutive modeling; processing maps; deep drawing process
• Online Access: https://doi.org/10.1515/htmp-2017-0047
• ISSN: 0334-6455; 2191-0324

A thorough understanding of hot deformation behavior plays a vital role in determining process parameters of hot working processes. Firstly, uniaxial tensile tests have been performed in the temperature ranges of 150 °C–600 °C and strain rate ranges of 0.0001–0.01s−1 for analyzing the deformation behavior of ASS 304 and ASS 316. The phenomenological-based constitutive models namely modified Fields–Backofen (m-FB) and Khan–Huang–Liang (KHL) have been developed. The prediction capability of these models has been verified with experimental data using various statistical measures. Analysis of statistical measures revealed KHL model has good agreement with experimental flow stress data. Through the flow stresses behavior, the processing maps are established and analyzed according to the dynamic materials model (DMM). In the processing map, the variation of the efficiency of the power dissipation is plotted as a function of temperature and strain rate. The processing maps results have been validated with experimental data.