High temperature rheological behavior and constitutive model of 316LN austenitic stainless steel

doi:10.13251/j.issn.0254-6051.2021.11.002

Abstract

Abstract: Isothermal compression test was carried out by Gleeble-3500 thermal simulation testing machine with strain rate of 0.001-1 s^-1, deformation temperature of 1223-1523 K and compression deformation of 65% to study the high temperature rheological behavior of forged 316LN stainless steel. The rheological stress constitutive model was established and applied to Deform-3D software platform. The thermal simulation test results were simulated in equal size by importing new material data and considering interface friction. The results show that the compressive stress of 316LN austenitic stainless steel decreases with the increase of deformation temperature at the same strain rate. At the same deformation temperature, the compressive stress increases with the increase of strain rate. In the true stress-true strain curves, the compressive stress gradually reaches a stable value with the increase of strain. Considering the interface friction coefficient, the deformation simulation is carried out by using Arrhenius constitutive model, which shows the effectiveness and reliability of the constitutive equation and simulation model, and can provide research basis and theoretical basis for the engineering application of 316LN stainless steel.

Key words: 316LN austenitic stainless steel, thermal deformation, constitutive model, Deform software, friction coefficient

CLC Number:

TG316

Zhu Xiaoning, Pan Qing, Li Yibo, Jiang Xuepeng. High temperature rheological behavior and constitutive model of 316LN austenitic stainless steel[J]. Heat Treatment of Metals, 2021, 46(11): 9-16.

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