Stages and Irregularities of Plastic Strain in Austenitic Stainless Steel within a Temperature Range of 143 < t < 420 k

This work aims at investigating the stages and irregularity of plastic strain in austenitic stainless steel 12Kh18N9T within a temperature range of 143 < T < 420 K. The localized plastic strain fronts at different stages of strain hardening have been visualized and monitored via digital speckle photography (DSP). This method consists in the high-accuracy recording of the displacement field via tracking any material surface changes and the subsequent comparison of speckle images acquired under uniaxial tension. The stress-strain diagrams were found to strongly vary with a decrease in temperature due to strain-induced-phase transition. The analysis of localized strain distributions revealed the emergence of a mobile system of equidistant strain localization foci at the strain hardening stage. The temperature dependence of plastic strain localization parameters at the linear strain hardening stage was established as well.

[1]  L. Zuev,et al.  Temperature Dependence of Autowave Characteristics of Localized Plasticity , 2021 .

[2]  L. Zuev,et al.  Autowave Physics of Material Plasticity , 2019, Crystals.

[3]  E. Aifantis,et al.  Kinematics of formation and cessation of type B deformation bands during the Portevin-Le Chatelier effect in an AlMg alloy , 2019, Results in Physics.

[4]  L. Zuev,et al.  The Features of Localized Plasticity Autowaves in Solids , 2019, Materials Research.

[5]  S. Ghosh,et al.  Effect of cryogenic deformation on microstructure and mechanical properties of 304 austenitic stainless steel , 2017 .

[6]  Yunzhang Fang,et al.  Using the Hollomon Model to Predict Strain-Hardening in Metals , 2017 .

[7]  M. Lebyodkin,et al.  Role of Self-Organization of Dislocations in the Onset and Kinetics of Macroscopic Plastic Instability , 2017, Metallurgical and Materials Transactions A.

[8]  V. Wildemann,et al.  Study of the spatial-time inhomogeneity of inelastic deformation and failure in bodies with concentrators by using the digital image correlation and infrared analysis , 2017 .

[9]  A. Shibkov,et al.  Intermittent plasticity associated with the spatio-temporal dynamics of deformation bands during creep tests in an AlMg polycrystal , 2016 .

[10]  C. Fressengeas,et al.  Effects of grain-to-grain interactions on shear strain localization in Al–Cu–Li rolled sheets , 2016 .

[11]  A. Müller,et al.  The Portevin–Le Châtelier Effect in a Metastable Austenitic Stainless Steel , 2015, Metallurgical and Materials Transactions A.

[12]  L. Krüger,et al.  Deformation Mechanisms in Austenitic TRIP/TWIP Steel as a Function of Temperature , 2014, Metallurgical and Materials Transactions A.

[13]  D. Eifler,et al.  Influence of Mechanical Loading, Temperature and Chemical Composition on the Deformation Induced Martensite Formation in Metastable Austenitic Steels , 2013 .

[14]  Lev B. Zuev,et al.  Elaboration of speckle photography techniques for plastic flow analyses , 2010 .

[15]  H. Sehitoglu,et al.  Strain hardening and heterogeneous deformation during twinning in Hadfield steel , 2010 .

[16]  N. Saintier,et al.  Elastic-plastic transition in iron: Structural and thermodynamic features , 2009 .

[17]  M. Tanzi,et al.  Mechanical Properties of Materials , 2018, Foundations of Biomaterials Engineering.

[18]  J. D. Embury,et al.  The Formation of Strain-induced Martensite in Stainless Steels , 2004 .

[19]  Y. Chang,et al.  Kinetics of deformation induced martensitic transformation in a 304 stainless steel , 2001 .

[20]  Mertens,et al.  Portevin-Le chatelier effect , 2000, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[21]  P. Hähner.  Theory of solitary plastic waves , 1994 .

[22]  Gregory B Olson,et al.  Kinetics of strain-induced martensitic nucleation , 1975 .